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The Chesapeake Bay ( ) is the largest
estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...
in the United States. The Bay is located in the Mid-Atlantic region and is primarily separated from the Atlantic Ocean by the Delmarva Peninsula (including the parts: the Eastern Shore of Maryland / Eastern Shore of Virginia and the state of
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent ...
) with its mouth of the Bay at the south end located between Cape Henry and Cape Charles. With its northern portion in Maryland and the southern part in Virginia, the Chesapeake Bay is a very important feature for the ecology and economy of those two states, as well as others surrounding within its watershed. More than 150 major rivers and streams flow into the Bay's drainage basin, which covers parts of six states (New York,
Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, ...
,
Delaware Delaware ( ) is a state in the Mid-Atlantic region of the United States, bordering Maryland to its south and west; Pennsylvania to its north; and New Jersey and the Atlantic Ocean to its east. The state takes its name from the adjacent ...
, Maryland, Virginia and
West Virginia West Virginia is a state in the Appalachian, Mid-Atlantic and Southeastern regions of the United States.The Census Bureau and the Association of American Geographers classify West Virginia as part of the Southern United States while the ...
) and all of District of Columbia. The Bay is approximately long from its northern headwaters in the
Susquehanna River The Susquehanna River (; Lenape: Siskëwahane) is a major river located in the Mid-Atlantic region of the United States, overlapping between the lower Northeast and the Upland South. At long, it is the longest river on the East Coast of the ...
to its outlet in the Atlantic Ocean. It is wide at its narrowest (between Kent County's Plum Point near Newtown in the east and the
Harford County Harford County is located in the U.S. state of Maryland. As of the 2020 census, the population was 260,924. Its county seat is Bel Air. Harford County is included in the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area, which is al ...
western shore near Romney Creek) and at its widest (just south of the mouth of the Potomac River which divides Maryland from Virginia). Total shoreline including tributaries is , circumnavigating a surface area of . Average depth is , reaching a maximum of . The Bay is spanned twice, in Maryland by the Chesapeake Bay Bridge from Sandy Point (near Annapolis) to Kent Island and in Virginia by the Chesapeake Bay Bridge–Tunnel connecting
Virginia Beach Virginia Beach is an independent city located on the southeastern coast of the Commonwealth of Virginia in the United States. The population was 459,470 at the 2020 census. Although mostly suburban in character, it is the most populous ci ...
to Cape Charles. Known for both its beauty and bounty, the Bay has become "emptier", with fewer crabs, oysters and watermen (fishermen) since the mid-20th century. Nutrient pollution and urban runoff have been identified as major components of impaired water quality in the bay stressing ecosystems and compounding the decline of shellfish due to overharvesting. Restoration efforts that began in the 1990s have continued into the 21st century and show potential for growth of the native oyster population. The health of the Chesapeake Bay improved in 2015, marking three years of gains over a four-year period, according to a 2016 report by the
University of Maryland The University of Maryland, College Park (University of Maryland, UMD, or simply Maryland) is a public land-grant research university in College Park, Maryland. Founded in 1856, UMD is the flagship institution of the University System of ...
. The bay is experiencing other environmental concerns, including climate change which is causing
sea level rise Globally, sea levels are rising due to human-caused climate change. Between 1901 and 2018, the globally averaged sea level rose by , or 1–2 mm per year on average.IPCC, 2019Summary for Policymakers InIPCC Special Report on the Ocean and Cr ...
that erodes coastal areas and infrastructure and changes to the marine ecosystem. These changes have already changed the coastline eroding islands like
Holland Island Holland Island was a marshy, rapidly eroding island in the Chesapeake Bay, in Dorchester County, Maryland, west of Salisbury. The island was once inhabited by watermen and farmers but has since been abandoned as sinking of the land's surface ...
or
Long Island Long Island is a densely populated island in the southeastern region of the U.S. state of New York, part of the New York metropolitan area. With over 8 million people, Long Island is the most populous island in the United States and the 18 ...
and threatening local infrastructure and economies.


Etymology

The word is an Algonquian word referring to a village 'at a big river'. It is the seventh-oldest surviving English place-name in the United States, first applied as ''Chesepiook'' by explorers heading north from the Roanoke Colony into a Chesapeake tributary in 1585 or 1586. The name may also refer to the Chesapeake people or the Chesepian, a Native American tribe who inhabited the area now known as South Hampton Roads in the U.S. state of Virginia. They occupied an area that is now the Norfolk, Portsmouth, Chesapeake, and Virginia Beach areas. In 2005, Algonquian linguist Blair Rudes "helped to dispel one of the area's most widely held beliefs: that 'Chesapeake' means something like 'great shellfish bay'. It does not, Rudes said. The name might have actually meant something like 'great water', or it might have just referred to a village location at the Bay's mouth."


Physical geography


Geology and formation

The Chesapeake Bay is an
estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environm ...
to the North Atlantic, lying between the Delmarva Peninsula to the east and the North American mainland to the west. It is the '' ria'', or drowned valley, of the
Susquehanna River The Susquehanna River (; Lenape: Siskëwahane) is a major river located in the Mid-Atlantic region of the United States, overlapping between the lower Northeast and the Upland South. At long, it is the longest river on the East Coast of the ...
, meaning that it was the alluvial plain where the river flowed when the sea level was lower. It is not a ''
fjord In physical geography, a fjord or fiord () is a long, narrow inlet with steep sides or cliffs, created by a glacier. Fjords exist on the coasts of Alaska, Antarctica, British Columbia, Chile, Denmark, Germany, Greenland, the Faroe Islands, Icel ...
'', because the Laurentide Ice Sheet never reached as far south as the northernmost point on the Bay. North of
Baltimore Baltimore ( , locally: or ) is the most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic, and the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was ...
, the western shore borders the hilly
Piedmont it, Piemontese , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = , demographics1_footnotes = , demographics1_title1 = , demographics1_info1 = , demographics1_title2 ...
region of Maryland; south of the city the Bay lies within the state's low-lying coastal plain, with sedimentary cliffs to the west, and flat islands, winding creeks and marshes to the east. The large rivers entering the Bay from the west have broad mouths and are extensions of the main ria for miles up the course of each river. The Bay's geology, its present form, and its very location were created by a bolide impact event at the end of the
Eocene The Eocene ( ) Epoch is a geological epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''ēṓs'', ...
(about 35.5 million years ago), forming the Chesapeake Bay impact crater and much later the Susquehanna River valley. The Bay was formed starting about 10,000 years ago when rising sea levels at the end of the last ice age flooded the Susquehanna River valley. Parts of the Bay, especially the Calvert County, Maryland, coastline, are lined by cliffs composed of deposits from receding waters millions of years ago. These cliffs, generally known as Calvert Cliffs, are famous for their
fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...
s, especially fossilized shark teeth, which are commonly found washed up on the beaches next to the cliffs.
Scientists' Cliffs Scientists' Cliffs is an unincorporated community in Calvert County, Maryland, United States. Other names used for the community include Annes Aggravation, Flippos Folly, Pathologists Quagmire. The private community was first established in 19 ...
is a beach community in Calvert County named for the desire to create a retreat for scientists when the community was founded in 1935.


Hydrology

Much of the Bay is shallow. At the point where the Susquehanna River flows into the Bay, the average depth is , although this soon diminishes to an average of southeast of the city of Havre de Grace, Maryland, to about just north of Annapolis. On average, the depth of the Bay is , including tributaries; over 24 percent of the Bay is less than deep. Because the Bay is an estuary, it has fresh water, salt water and
brackish Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estua ...
water. Brackish water has three salinity zones: oligohaline, mesohaline, and
polyhaline Polyhaline is a salinity category term applied to brackish estuaries An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries fo ...
. The freshwater zone runs from the mouth of the Susquehanna River to north
Baltimore Baltimore ( , locally: or ) is the most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic, and the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was ...
. The oligohaline zone has very little salt. Salinity varies from 0.5  ppt (parts per thousand) to 10 ppt, and freshwater species can survive there. The north end of the oligohaline zone is north Baltimore and the south end is the Chesapeake Bay Bridge. The mesohaline zone has a medium amount of salt and runs from the Bay Bridge to the mouth of the Rappahannock River. Salinity there ranges from 1.07% to 1.8%. The polyhaline zone is the saltiest zone, and some of the water can be as salty as sea water. It runs from the mouth of the Rappahannock River to the mouth of the Bay. The salinity ranges from 1.87% to 3.6%. (3.6% is as salty as the ocean.) The climate of the area surrounding the Bay is primarily humid subtropical, with hot, very humid summers and cold to mild winters. Only the area around the mouth of the Susquehanna River is continental in nature, and the mouth of the Susquehanna River and the Susquehanna
flats Flat or flats may refer to: Architecture * Flat (housing), an apartment in the United Kingdom, Ireland, Australia and other Commonwealth countries Arts and entertainment * Flat (music), a symbol () which denotes a lower pitch * Flat (soldier), ...
often freeze in winter. It is rare for the surface of the Bay to freeze in winter, something that happened most recently in the winter of 1976–77. The Chesapeake Bay is the end point of over 150 rivers and streams. The largest rivers flowing directly into the Bay, in order of discharge, are: *
Susquehanna River The Susquehanna River (; Lenape: Siskëwahane) is a major river located in the Mid-Atlantic region of the United States, overlapping between the lower Northeast and the Upland South. At long, it is the longest river on the East Coast of the ...
* Potomac River * James River * Rappahannock River * York River * Patuxent River *
Choptank River The Choptank River is a major tributary of the Chesapeake Bay and the largest river on the Delmarva Peninsula. Running for ,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed April 1, 20 ...
For more information on Chesapeake Bay rivers, see the
List of Chesapeake Bay rivers This list of Chesapeake Bay rivers includes the main rivers draining into the Chesapeake Bay estuarine complex on the mid-Atlantic eastern coast of the United States, North America. The three largest rivers in order of both discharge and watershe ...
.


Flora and fauna

The Chesapeake Bay is home to numerous fauna that either migrate to the Bay at some point during the year or live there year-round. There are over 300 species of fish and numerous shellfish and crab species. Some of these include the Atlantic menhaden, striped bass,
American eel The American eel (''Anguilla rostrata'') is a facultative catadromous fish found on the eastern coast of North America. Freshwater eels are fish belonging to the elopomorph superorder, a group of phylogenetically ancient teleosts. The Amer ...
, eastern oyster, Atlantic horseshoe crab, and the blue crab. Birds include
osprey The osprey (''Pandion haliaetus''), , also called sea hawk, river hawk, and fish hawk, is a diurnal, fish-eating bird of prey with a cosmopolitan range. It is a large raptor reaching more than in length and across the wings. It is brown o ...
s, great blue herons, bald eagles, and peregrine falcons, the last two of which were threatened by DDT; their numbers plummeted but have risen in recent years. The piping plover is a
near threatened A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify fo ...
species that inhabits the wetlands. Larger fish such as
Atlantic sturgeon The Atlantic sturgeon (''Acipenser oxyrinchus oxyrinchus'') is a member of the family Acipenseridae and along with other sturgeon it is sometimes considered a living fossil. The Atlantic sturgeon is one of two subspecies of '' A. oxyrinchus'', ...
, varieties of sharks, and stingrays visit the Chesapeake Bay. The waters of the Chesapeake Bay have been regarded as one of the most important nursery areas for sharks along the east coast.The National Aquarium
Sharks Among Us: Chesapeake Bay Species
. Retrieved on December 22. 2014
Megafaunas such as bull sharks, tiger sharks, scalloped hammerhead sharks, and basking sharks and manta rays are also known to visit. Smaller species of sharks and stingrays that are known to be regular to occasional residents in the bay include the
smooth dogfish The dusky smooth-hound (''Mustelus canis''), also called the smooth dogfish or the dog shark, is a species of houndshark in the family Triakidae. This shark is an olive grey or brown in color, and may have shades of yellow or grayish white. Femal ...
, spiny dogfish, cownose ray, and
bonnethead The bonnethead (''Sphyrna tiburo''), also called a bonnet shark or shovelhead, is a small member of the hammerhead shark genus '' Sphyrna'', and part of the family Sphyrnidae. It is an abundant species in the littoral zone of the North Atlantic ...
. Bottlenose dolphins are known to live seasonally/yearly in the Bay. There have been unconfirmed sightings of
humpback whale The humpback whale (''Megaptera novaeangliae'') is a species of baleen whale. It is a rorqual (a member of the family Balaenopteridae) and is the only species in the genus ''Megaptera''. Adults range in length from and weigh up to . The hu ...
s in recent years. Endangered North Atlantic right whale and fin, and minke and sei whales have also been sighted within and in the vicinity of the Bay. A male manatee visited the Bay several times between 1994 and 2011, even though the area is north of the species' normal range. The manatee, recognizable due to distinct markings on its body, was nicknamed "Chessie" after a legendary sea monster that was allegedly sighted in the Bay during the 20th century. The same manatee has been spotted as far north as
Rhode Island Rhode Island (, like ''road'') is a U.S. state, state in the New England region of the Northeastern United States. It is the List of U.S. states by area, smallest U.S. state by area and the List of states and territories of the United States ...
, and was the first manatee known to travel so far north. Other manatees are occasionally seen in the Bay and its tributaries, which contain sea grasses that are part of the manatee's diet. Loggerhead turtles are known to visit the Bay. The Chesapeake Bay is also home to a diverse flora, both land and aquatic. Common submerged aquatic vegetation includes eelgrass and
widgeon grass ''Ruppia'', also known as the widgeonweeds, ditch grasses or widgeon grass, is the only extant genus in the family Ruppiaceae, with eight known species. These are aquatic plants widespread over much of the world. The genus name honours Heinrich ...
. A report in 2011 suggested that information on underwater grasses would be released, because "submerged grasses provide food and habitat for a number of species, adding oxygen to the water and improving water clarity." Other vegetation that makes its home in other parts of the Bay are wild rice, various trees like the red maple, loblolly pine and bald cypress, and spartina grass and
phragmites ''Phragmites'' () is a genus of four species of large perennial reed grasses found in wetlands throughout temperate and tropical regions of the world. Taxonomy The World Checklist of Selected Plant Families, maintained by Kew Garden in L ...
. Invasive plants have taken a significant foothold in the Bay; plants such as Brazilian waterweed, native to South America, have spread to most continents with the help of aquarium owners, who often dump the contents of their aquariums into nearby lakes and streams. It is highly invasive, and has the potential to flourish in the low-salinity tidal waters of the Chesapeake Bay. Dense stands of Brazilian waterweed can restrict water movement, trap sediment and affect water quality. Various local K-12 schools in the Maryland and Virginia region often have programs that cultivate native bay grasses and plant them in the Bay.


History


Pre Columbian

The Chesapeake Bay has had a human presence for over 11,500 years. "Paleoindians," or the first humans in the Chesapeake Bay region, lived off the land by hunting game and living off the earth in small nomadic groups. Archeologists have also noted the presence of “foreign” stones in projectile points that came via trade from other parts of North America. For thousands of years, Native American societies lived in villages of wooden longhouses close to water bodies where they fished and farmed the land. Agricultural products included beans, corn, tobacco, and squash. Villages often lasted between 10 and 20 years before being abandoned due to local resources such as firewood running out or soil depleting. To produce enough food, labor was divided with men hunting while the women supervised the village's farming. All village members took part in the harvesting of fish and shellfish from the local bodies of water. As time went on, communities around Chesapeake Bay formed confederations such as the Powhatan, the Piscataway, and the Nanticoke. Each of these confederations consisted of a collections of smaller tribes falling under the leadership of a central chief.


European exploration and settlement

In 1524, Italian explorer Giovanni da Verrazzano, (1485–1528), in service of the French crown, (famous for sailing through and thereafter naming the entrance to New York Bay as the " Verrazzano Narrows", including now in the 20th century, a suspension bridge also named for him) sailed past the Chesapeake, but did not enter the Bay. Spanish explorer
Lucas Vásquez de Ayllón Lucas or LUCAS may refer to: People * Lucas (surname) * Lucas (given name) Arts and entertainment * Luca Family Singers, also known as "lucas ligner en torsk" * ''Lucas'' (album) (2007), an album by Skeletons and the Kings of All Cities * ''Lu ...
sent an expedition out from Hispaniola in 1525 that reached the mouths of the Chesapeake and Delaware Bays. It may have been the first European expedition to explore parts of the Chesapeake Bay, which the Spaniards called "Bahía de Santa María" ("Bay of St. Mary") or "Bahía de Madre de Dios."("Bay of the Mother of God") De Ayllón established a short-lived Spanish mission settlement, San Miguel de Gualdape, in 1526 along the Atlantic coast. Many scholars doubt the assertion that it was as far north as the Chesapeake; most place it in present-day Georgia's
Sapelo Island Sapelo Island is a state-protected barrier island located in McIntosh County, Georgia. The island is accessible only by aircraft or boat; the primary ferry comes from the Sapelo Island Visitors Center in McIntosh County, Georgia, a seven-mil ...
. In 1573, Pedro Menéndez de Márquez, the governor of Spanish Florida, conducted further exploration of the Chesapeake. In 1570, Spanish
Jesuits , image = Ihs-logo.svg , image_size = 175px , caption = ChristogramOfficial seal of the Jesuits , abbreviation = SJ , nickname = Jesuits , formation = , founders = ...
established the short-lived Ajacan Mission on one of the Chesapeake tributaries in present-day Virginia. The arrival of English colonists under Sir Walter Raleigh and Humphrey Gilbert in the late 16th century to found a colony, later settled at Roanoke Island (off the present-day coast of
North Carolina North Carolina () is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. The state is the List of U.S. states and territories by area, 28th largest and List of states and territories of the United ...
) for the Virginia Company, marked the first time that the English approached the gates to the Chesapeake Bay between the capes of Cape Charles and Cape Henry. Three decades later, in 1607, Europeans again entered the Bay. Captain John Smith of
England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe ...
explored and mapped the Bay between 1607 and 1609, resulting in the publication in 1612 back in the
British Isles The British Isles are a group of islands in the North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner and Outer Hebrides, the Northern Isl ...
of ''"A Map of Virginia"''. Smith wrote in his journal: "Heaven and earth have never agreed better to frame a place for man's habitation." The new laying out of the " Captain John Smith Chesapeake National Historic Trail", the United States' first designated "all-water" National Historic Trail, was created in July 2006, by the
National Park Service The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational properti ...
of the U.S. Department of the Interior following the route of Smith's historic 17th-century voyage. Because of economic hardships and civil strife in the "Mother Land", there was a mass migration of southern English Cavaliers and their servants to the Chesapeake Bay region between 1640 and 1675, to both of the new colonies of the
Province of Virginia The Colony of Virginia, chartered in 1606 and settled in 1607, was the first enduring English colony in North America, following failed attempts at settlement on Newfoundland by Sir Humphrey GilbertGilbert (Saunders Family), Sir Humphrey" (hist ...
and the Province of Maryland.


American Revolution to the present

The Chesapeake Bay was the site of the Battle of the Chesapeake (also known as the "Battle of the Capes", Cape Charles and Cape Henry) in 1781, during which the French fleet defeated the
Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against Fr ...
in the decisive naval battle of the
American Revolutionary War The American Revolutionary War (April 19, 1775 – September 3, 1783), also known as the Revolutionary War or American War of Independence, was a major war of the American Revolution. Widely considered as the war that secured the independence of t ...
. The British defeat enabled General George Washington and his
French French (french: français(e), link=no) may refer to: * Something of, from, or related to France ** French language, which originated in France, and its various dialects and accents ** French people, a nation and ethnic group identified with Franc ...
allied armies under
Comte de Rochambeau Marshal Jean-Baptiste Donatien de Vimeur, comte de Rochambeau, 1 July 1725 – 10 May 1807, was a French nobleman and general whose army played the decisive role in helping the United States defeat the British army at Yorktown in 1781 during the ...
to march down from New York and bottle up the rampaging southern
British Army The British Army is the principal land warfare force of the United Kingdom, a part of the British Armed Forces along with the Royal Navy and the Royal Air Force. , the British Army comprises 79,380 regular full-time personnel, 4,090 Gurkha ...
of Lord Cornwallis from the
North North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north ...
and South Carolinas at the siege of
Battle of Yorktown The Siege of Yorktown, also known as the Battle of Yorktown, the surrender at Yorktown, or the German battle (from the presence of Germans in all three armies), beginning on September 28, 1781, and ending on October 19, 1781, at Yorktown, Virgi ...
in Yorktown, Virginia. Their marching route from Newport, Rhode Island through Connecticut, New York State, Pennsylvania, New Jersey and Delaware to the "Head of Elk" by the
Susquehanna River The Susquehanna River (; Lenape: Siskëwahane) is a major river located in the Mid-Atlantic region of the United States, overlapping between the lower Northeast and the Upland South. At long, it is the longest river on the East Coast of the ...
along the shores and also partially sailing down the Bay to
Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth are ...
. It is also the subject of a designated National Historic Trail under the
National Park Service The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational properti ...
as the Washington–Rochambeau Revolutionary Route. The Bay would again see conflict during
War of 1812 The War of 1812 (18 June 1812 – 17 February 1815) was fought by the United States of America and its indigenous allies against the United Kingdom and its allies in British North America, with limited participation by Spain in Florida. It be ...
. During the year of 1813, from their base on Tangier Island, British naval forces under the command of Admiral George Cockburn raided several towns on the shores of the Chesapeake, treating the Bay as if it were a "British Lake". The
Chesapeake Bay Flotilla The Chesapeake Bay Flotilla was a motley collection of barges and gunboats that the United States assembled under the command of Joshua Barney, an 1812 privateer captain, to stall British attacks in the Chesapeake Bay which came to be known as ...
, a fleet of shallow-draft armed barges under the command of U.S. Navy Commodore
Joshua Barney Joshua Barney (6 July 1759 – 1 December 1818) was an American Navy officer who served in the Continental Navy during the Revolutionary War and as a captain in the French Navy during the French Revolutionary Wars. He later achieved the rank ...
, was assembled to stall British shore raids and attacks. After months of harassment by Barney, the British landed on the west side of the Patuxent at
Benedict, Maryland Benedict is an unincorporated town and census-designated place in Charles County, Maryland, United States, located on the Patuxent River in southern Maryland. As of the 2010 census, it had a population of 261. Demographics History Originally a ...
, the Chesapeake Flotilla was scuttled, and the British trekked overland to rout the U.S. Army at Bladensburg and burn the U.S. Capitol in August 1814. A few days later in a "pincer attack", they also sailed up the Potomac River to attack Fort Washington below the National Capital and raided the nearby port town of
Alexandria, Virginia Alexandria is an independent city in the northern region of the Commonwealth of Virginia, United States. It lies on the western bank of the Potomac River approximately south of downtown Washington, D.C. In 2020, the population was 159,467. ...
. There were so-called " Oyster Wars" in the late 19th and early 20th centuries. Until the mid-20th century, oyster harvesting rivaled the crab industry among Chesapeake watermen, a dwindling breed whose skipjacks and other workboats were supplanted by recreational craft in the latter part of the century. In the 1960s, the
Calvert Cliffs Nuclear Power Plant The Calvert Cliffs Nuclear Power Plant (CCNPP) is a nuclear power plant located on the western shore of the Chesapeake Bay near Lusby, Calvert County, Maryland in the Mid-Atlantic United States. It is the only nuclear power plant in the state ...
on the historic Calvert Cliffs in
Calvert County Calvert County is located in the U.S. state of Maryland. As of the 2020 census, the population was 92,783. Its county seat is Prince Frederick. The county's name is derived from the family name of the Barons of Baltimore, the proprietors of ...
on the Western Shore of Maryland began using water from the Bay to cool its reactor.


Navigation

The Chesapeake Bay forms a link in the Intracoastal Waterway, of the bays, sounds and inlets between the off-shore barrier islands and the coastal mainland along the Atlantic coast connecting the Chesapeake and Delaware Canal (linking the Bay to the north and the Delaware River) with the
Albemarle and Chesapeake Canal The Albemarle and Chesapeake Canal was built by a corporation in 1856-1860 to afford inland navigation between the Chesapeake Bay and the Albemarle Sound. It is really two canals, thirty miles (50 km) apart, one eight and one-half miles (13. ...
(linking the Bay, to the south, via the Elizabeth River, by the cities of
Norfolk Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the Nor ...
and
Portsmouth Portsmouth ( ) is a port and city in the ceremonial county of Hampshire in southern England. The city of Portsmouth has been a unitary authority since 1 April 1997 and is administered by Portsmouth City Council. Portsmouth is the most d ...
to the Albemarle Sound and Pamlico Sound in
North Carolina North Carolina () is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. The state is the List of U.S. states and territories by area, 28th largest and List of states and territories of the United ...
and further to the Sea Islands of Georgia). A busy shipping channel (dredged by the
U.S. Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...
since the 1850s) runs the length of the Bay, is an important transit route for large vessels entering or leaving the Port of Baltimore, and further north through the Chesapeake and Delaware Canal to the ports of Wilmington and
Philadelphia Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City. Since ...
on the Delaware River. During the later half of the 19th century and the first half of the 20th century, the Bay was plied by passenger steamships and packet boat lines connecting the various cities on it, notably the Baltimore Steam Packet Company ("Old Bay Line"). In the later 20th century, a series of road crossings were built. One, the Chesapeake Bay Bridge (also known as the Governor William Preston Lane, Jr. Memorial Bridge) between the state capital of Annapolis, Maryland and Matapeake on the Eastern Shore, crossing Kent Island, was constructed 1949–1952. A second, parallel, span was added in 1973. The Chesapeake Bay Bridge–Tunnel, connecting
Virginia's Eastern Shore The Virginia's Eastern Shore AVA is an American Viticultural Area that includes a length of Virginia's Eastern Shore and consists of the counties of Accomack and Northampton. The topography in this AVA is mostly level and ranges from sea ...
with its mainland (at the metropolitan areas of
Virginia Beach Virginia Beach is an independent city located on the southeastern coast of the Commonwealth of Virginia in the United States. The population was 459,470 at the 2020 census. Although mostly suburban in character, it is the most populous ci ...
,
Norfolk Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the Nor ...
,
Portsmouth Portsmouth ( ) is a port and city in the ceremonial county of Hampshire in southern England. The city of Portsmouth has been a unitary authority since 1 April 1997 and is administered by Portsmouth City Council. Portsmouth is the most d ...
, and
Chesapeake Chesapeake often refers to: *Chesapeake people, a Native American tribe also known as the Chesepian * The Chesapeake, a.k.a. Chesapeake Bay *Delmarva Peninsula, also known as the Chesapeake Peninsula Chesapeake may also refer to: Populated plac ...
), is approximately long; it has trestle bridges as well as two stretches of tunnels that allow unimpeded shipping; the bridge is supported by four man-made islands. The Chesapeake Bay Bridge Tunnel was opened for two lanes in 1964 and four lanes in 1999.


Tides

Tides in the Chesapeake Bay exhibit an interesting and unique behavior due to the nature of the topography (both horizontal and vertical shape), wind-driven circulation, and how the Bay interacts with oceanic tides. Research into the peculiar behavior of tides both at the northern and southern extents of the Bay began in the late 1970s. One study noted sea level fluctuations at periods of 5 days, driven by sea level changes at the Bay's mouth on the Atlantic coast and local lateral winds, and 2.5 days, caused by resonant oscillations driven by local longitudinal winds, while another study later found that the geometry of the Bay permits for a resonant period of 1.46 days. A good example of how the different Chesapeake Bay sites experience different tides can be seen in the tidal predictions published by the National Oceanographic and Atmospheric Administration (NOAA) (see figure at right). At the Chesapeake Bay Bridge–Tunnel (CBBT) site, which lies at the southernmost point of the Bay where it meets the Atlantic Ocean near Norfolk, Virginia, and the capes of Charles and Henry, there is a distinct semi-diurnal tide throughout the lunar month, with small amplitude modulations during spring (new/full moon) vs. neap (one/three quarter moon) tidal periods. The main forcing of the CBBT tides are typical, semi-diurnal ocean tides that the East Coast of the United States experiences. Baltimore, in the northern portion of the Bay, experiences a noticeable modulation to form its mixed tidal nature during spring vs. neap tides. Spring tides, when the sun-earth-moon system forms a line, cause the largest tidal amplitudes during lunar monthly tidal variations. In contrast, neap tides, when the sun-earth-moon system forms a right angle, are muted, and in a semi-diurnal tidal system (such as that seen at the CBBT site) this can be seen as a lowest intertidal range. Two interesting points that arise from comparing these two sites at opposite ends of the Bay are their tidal characteristics - semi-diurnal tide for CBBT and mixed tide for Baltimore (due to resonance in the Bay) - and the differences in amplitude (due to dissipation in the Bay).


Economy


Fishing industry

The Bay is well-known for its seafood, especially
blue crabs Blue crab may refer to: * Blue Crab 11, an American sailboat design * ''Callinectes sapidus'' – Chesapeake or Atlantic blue crab of the West Atlantic, introduced elsewhere * '' Cardisoma guanhumi'' – blue land crab of the West Atlantic * ''Disc ...
, clams, and oysters. In the middle of the 20th century, the Bay supported 9,000 full-time watermen, according to one account. Today, the body of water is less productive than it used to be because of
runoff Runoff, run-off or RUNOFF may refer to: * RUNOFF, the first computer text-formatting program * Runoff or run-off, another name for bleed, printing that lies beyond the edges to which a printed sheet is trimmed * Runoff or run-off, a stock marke ...
from urban areas (mostly on the Western Shore) and farms (especially on the Eastern Shore and in the Susquehanna River watershed), over-harvesting, and invasion of foreign species. The plentiful oyster harvests led to the development of the skipjack, the state boat of Maryland, which is the only remaining working boat type in the United States still under sail power. Other characteristic bay-area workboats include sail-powered boats such as the log canoe, the pungy, the bugeye, and the motorized Chesapeake Bay deadrise, the state boat of Virginia. In addition to harvesting wild oysters, oyster farming is a growing industry in the Bay. Oyster aquaculture is passive in that the Bay provides all the natural oyster food needed, making it an environmentally-friendly practice in contrast to other kinds of fish farming. Oyster farms provide jobs as well as a natural effort for filtering excess nutrients from the water in an effort to reduce the effects of
eutrophication Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phyt ...
pollution Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, th ...
(too much algae). The Chesapeake Bay Program promotes oyster restoration projects to reduce the amount of nitrogen compounds entering the Chesapeake Bay. There are numerous ways to cook and eat oysters, as well as recipes and sauces to accompany oyster dishes. One account: The Bay is famous for its rockfish, a regional name for striped bass. Once on the verge of extinction, rockfish have made a significant comeback because of legislative action that put a moratorium on rockfishing, which allowed the species to re-populate. Rockfish can now be fished in strictly controlled and limited quantities. Other popular recreational fisheries in the Chesapeake Bay include shad, cobia, croaker, and redfish, winter flounder, and summer flounder. Recently, non-native blue catfish have proliferated in tributaries like the James River and may be moving to other areas of the Bay. A commercial fishery exists for menhaden, too oily for human consumption but instead used for bait, fish oil, and livestock feed.


Tourism and recreation

The Chesapeake Bay is a main feature for tourists who visit Maryland and Virginia each year. Fishing, crabbing, swimming, boating, kayaking, and sailing are extremely popular activities enjoyed on the waters of the Chesapeake Bay. As a result, tourism has a notable impact on Maryland's economy. One report suggested that Annapolis was an appealing spot for families, water sports and boating. Commentator Terry Smith spoke about the Bay's beauty: One account suggested how the Chesapeake attracts people: The Chesapeake Bay plays an important role in Maryland, Virginia, and Pennsylvania's economies, in addition to the ecosystem. The nature-based recreation of wildlife, boating, and ecotourism are dependent on the Clean Water Act (CWA), that was enacted in order to maintain a polluted-free Bay. In 2006, "roughly eight million wildlife watchers spent $636 million, $960 million, and $1.4 billion in Maryland, Virginia, and Pennsylvania." -Carrie Grisham, Chesapeake Bay Foundation, 2009


Cuisine

In colonial times, simple cooking techniques were used to create one pot meals like ham and potato casserole, clam chowder, or stews with common ingredients like oysters, chicken or venison. When John Smith landed in Chesapeake in 1608 he wrote: "The fish were so thick, we attempted to catch them with frying pans". Common regional ingredients in the local cuisine of Chesapeake included terrapins, smoked hams, blue crab, shellfish, local fish, game meats and various species of waterfowl. Blue crab continues to be an especially popular regional specialty.


Environmental issues


Pollution

In the 1970s, the Chesapeake Bay was found to contain one of the planet's first identified marine dead zones, where waters were so depleted of oxygen that they were unable to support life, resulting in massive fish kills. In 2010 the bay's dead zones were estimated to kill 75,000 tons of bottom-dwelling clams and worms each year, weakening the base of the estuary's food chain and robbing the blue crab in particular of a primary food source. Crabs are sometimes observed to amass on shore to escape pockets of oxygen-poor water, a behavior known as a "crab jubilee". Hypoxia results in part from large algal blooms, which are nourished by the runoff of residential, farm and industrial
waste Waste (or wastes) are unwanted or unusable materials. Waste is any substance discarded after primary use, or is worthless, defective and of no use. A by-product, by contrast is a joint product of relatively minor economic value. A waste pr ...
throughout the watershed. A 2010 report criticized
Amish The Amish (; pdc, Amisch; german: link=no, Amische), formally the Old Order Amish, are a group of traditionalist Anabaptist Christian church fellowships with Swiss German and Alsatian origins. They are closely related to Mennonite churc ...
farmers for having cows that "generate heaps of manure that easily washes into streams and flows onward into the Chesapeake Bay". The pollution entering the bay has multiple components that contribute to the algal bloom, principally the nutrients
phosphorus Phosphorus is a chemical element with the symbol P and atomic number 15. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Ea ...
and
nitrogen Nitrogen is the chemical element with the symbol N and atomic number 7. Nitrogen is a nonmetal and the lightest member of group 15 of the periodic table, often called the pnictogens. It is a common element in the universe, estimated at se ...
. The algae prevents sunlight from reaching the bottom of the bay while alive and deoxygenates the bay's water when it dies and rots. Soil erosion and runoff of
sediment Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand ...
into the bay, exacerbated by devegetation, construction and the prevalence of pavement in urban and suburban areas, also block vital sunlight. The resulting loss of aquatic vegetation has depleted the habitat for much of the bay's animal life. Beds of eelgrass, the dominant variety in the southern Chesapeake Bay, have shrunk by more than half there since the early 1970s. Overharvesting, pollution, sedimentation and disease have turned much of the bay's bottom into a muddy wasteland. One particularly harmful source of toxicity is ''
Pfiesteria piscicida ''Pfiesteria piscicida'' is a dinoflagellate species of the genus '' Pfiesteria'' that some researchers claim is responsible for many harmful algal blooms in the 1980s and 1990s on the coast of North Carolina and Maryland. North Carolinian media ...
'', which can affect both fish and humans. ''Pfiesteria'' caused a small regional panic in the late 1990s when a series of large blooms started killing large numbers of fish while giving swimmers mysterious rashes; nutrient runoff from chicken farms was blamed for the growth.


Depletion of oysters

While the bay's salinity is ideal for oysters and the oyster fishery was at one time the bay's most commercially viable, the population has in the last fifty years been devastated. Maryland once had roughly of oyster reefs. In 2008 there were about . It has been estimated that in pre-colonial times, oysters could filter the entirety of the bay in about 3.3 days; by 1988 this time had increased to 325 days. The harvest's gross value decreased 88% from 1982 to 2007. One report suggested the bay had fewer oysters in 2008 than 25 years earlier. The primary problem is overharvesting. Lax government regulations allow anyone with a license to remove oysters from state-owned beds, and although limits are set, they are not strongly enforced. The overharvesting of oysters has made it difficult for them to reproduce, which requires close proximity to one another. A second cause for the oyster depletion is that the drastic increase in human population caused a sharp increase in pollution flowing into the bay. The bay's oyster industry has also suffered from two diseases: MSX and Dermo. The depletion of oysters has had a particularly harmful effect on the quality of the bay. Oysters serve as natural water filters, and their decline has further reduced the water quality of the bay. Water that was once clear for meters is now so
turbid Turbidity is the cloudiness or haziness of a fluid caused by large numbers of individual particles that are generally invisible to the naked eye, similar to smoke in air. The measurement of turbidity is a key test of water quality. Fluids c ...
that a wader may lose sight of his feet while his knees are still dry.


Institutional responses to pollution problems

Concern about the increasing discoveries of bay pollution problems, and of the institutional challenges of organizing bay restoration programs over a large geographical area, led to
Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...
directing the US Environmental Protection Agency (EPA) to take a greater role in studying the scientific and technical aspects of the problems beginning in the late 1970s. The agency conducted its research over a seven-year period and published a major report in 1983. The report stated that the bay was an "ecosystem in decline" and cited numerous instances of declines in the populations of oysters, crabs, freshwater fish and other wildlife. The growing concerns about pollution also prompted the legislatures of Maryland and Virginia to establish the Chesapeake Bay Commission, an advisory body, in 1980. The commission consults with the state legislatures and executive agencies, as well as Congress, about environmental, economic and social issues related to the bay. As an initial follow-up to the EPA report, the Chesapeake Bay Commission and EPA developed the ''Chesapeake Bay Agreement'' in 1983. The agreement was signed by the by the governors of Maryland, Virginia and Pennsylvania; the Mayor of the District of Columbia; and the EPA Administrator. The parties agreed to: * creation of an "Executive Council" consisting of cabinet-level appointees from each state and Washington, D.C., and the EPA Regional Administrator * the council's creation of an implementation committee to coordinate technical issues and development management plans for bay restoration * the establishment of the Chesapeake Bay Program as a liaison office for all of the participating organizations. The program's office, based in Annapolis, is partially funded by EPA and staffed by experts from the member states, EPA and other federal agencies, and academic institutions. Concurrent with the 1983 agreement EPA began providing matching grants to the bay states for research and restoration projects. In 1987 the parties agreed to set a goal of reducing the amount of nutrients that enter the bay by 40 percent by 2000. In 1992, the bay program partners agreed to continue the 40 percent reduction goal beyond 2000 and to attack nutrients at their source: upstream, in the bay
tributaries A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drain ...
.


Restoration efforts

Efforts of federal, state and local governments, working in partnership through the Chesapeake Bay Program along with the Chesapeake Bay Foundation and other nonprofit environmental groups, to restore or at least maintain the current water quality, have had mixed results. One particular obstacle to cleaning up the bay is that much of the polluting substances are discharged far upstream in lying within states far removed from the bay: New York and Pennsylvania. Despite the State of Maryland spending over $100 million to restore the bay, conditions have continued to grow worse. In the mid-20th century, the Bay supported over 6,000 oystermen. As of 2008, there were fewer than 500. In June 2000, the Chesapeake Bay Program adopted ''Chesapeake 2000,'' an agreement adopted by the member jurisdictions, intended to guide restoration activities throughout the Chesapeake Bay watershed through 2010. One component of this agreement was a series of upgrades to
sewage treatment Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding en ...
plants throughout the watershed. In 2016 EPA stated that the upgrades "have resulted in steep reductions in nitrogen and phosphorus pollution... despite increases in human population and wastewater volume." EPA published a series of scientific documents on water quality criteria for the bay between 2004 and 2010. The criteria documents, which describe specific pollutants and their effects on aquatic species, are used by the states to develop water quality standards (WQS) for individual water bodies. Delaware, Maryland, Virginia, and the District of Columbia adopted WQS for various Chesapeake Bay tributaries in the mid-2000s, referencing the EPA criteria documents, as well as their own extensive data gathering and modeling efforts. Restoration efforts that began in the 1990s have continued into the 21st century and show potential for growth of the native oyster population. Efforts to repopulate the bay using oyster hatcheries have been carried out by a group called the Oyster Recovery Partnership, with some success. In 2011 the group placed 6 million oysters on of the Trent Hall sanctuary.Program turns pork into oysters
, Jesse Yeatman, South Maryland Newspapers Online, August 12, 2009.
Scientists from the Virginia Institute of Marine Science at the College of William & Mary claim that experimental reefs created in 2004 now house 180 million native oysters, '' Crassostrea virginica'', which is far fewer than the billions that once existed.


Regulatory actions

In 2009 the Chesapeake Bay Foundation (CBF) filed suit against EPA for its failure to finalize a total maximum daily load (TMDL) ruling for the bay, pursuant to the Clean Water Act. The TMDL would restrict
water pollution Water pollution (or aquatic pollution) is the contamination of water bodies, usually as a result of human activities, so that it negatively affects its uses. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. ...
from farms, land development, power plants and sewage treatment plants. EPA, which had been working with the states on various components of the TMDL since the 1980s (e.g. water quality criteria, standards for individual tributaries, improvements in data gathering and modeling techniques), agreed to settle the lawsuit and issued its TMDL for nitrogen, phosphorus and sediment pollution on December 29, 2010. This was the largest, most complex TMDL document that EPA had issued to date. The TMDL was challenged in litigation by the agriculture and construction industries, but EPA's document was upheld by the courts. In 2020 the CBF filed another lawsuit against EPA for its failure to require the states of New York and Pennsylvania to comply with their TMDL goals and reduce pollution in the bay. EPA's 2010 TMDL document requires all states in the bay watershed region to develop detailed implementation plans for pollutant reduction. The states have been developing their plans for years, in many cases building upon restoration projects that they had initiated before EPA's TMDL was finalized. These plans are long and complex, involving regular consultation with many stakeholders (i.e. governments, industry, agriculture, citizen groups). The plans include multiple milestone goals for project initiation or continued progress in water quality, through the use of pollution control upgrades (such as at sewage treatment plants) and more widespread utilization of various
best management practices Best or The Best may refer to: People * Best (surname), people with the surname Best * Best (footballer, born 1968), retired Portuguese footballer Companies and organizations * Best & Co., an 1879–1971 clothing chain * Best Lock Corporation, ...
(BMPs). The BMPs are designed for specific sites to control pollution from nonpoint sources, principally agriculture, land development and urban runoff. For example, a farmer may install vegetated stream buffers along a stream bank to reduce runoff of sediment, nutrients and other pollutants. A land developer may install stormwater management facilities such as infiltration basins or constructed wetlands during the construction of housing or commercial buildings. Installation of stormwater management facilities is already a requirement for most new construction projects in the bay region, under various state and local government requirements. These facilities reduce erosion and keep sediment and other pollutants from entering tributaries and the bay. However retrofitting such facilities into existing developed areas is often expensive due to high land costs, or difficult to install among existing structures. As a result the extent of such retrofit projects in the bay region has been limited.


Water quality improvements

In 2010 bay health improved slightly in terms of the overall health of its ecosystem, earning a rating of 31 out of 100, up from a 28 rating in 2008. An estimate in 2006 from a "blue ribbon panel" said cleanup costs would be $15 billion. Compounding the problem is that 100,000 new residents move to the area each year. A 2008 ''Washington Post'' report suggested that government administrators had overstated progress on cleanup efforts as a way to "preserve the flow of federal and state money to the project." In January 2011, there were reports that millions of fish had died, but officials suggested it was probably the result of extremely cold weather. The health of the Chesapeake Bay improved in 2015, marking three years of gains over a four-year period, according to a 2016 report by the
University of Maryland Center for Environmental Science With 1925 origins as a research station on Solomons Island, the University of Maryland Center for Environmental Science (UMCES) is the only scientific research center within the University System of Maryland. In 1973 it became the Center for Envi ...
(UMCES). In 2021 scientists at the UMCES reported slight improvements in bay water quality compared to levels measured in 2020. The greatest improvements were seen in the lower bay areas, while the Patapsco River and Back River (Maryland) regions showed minimal improvement. Positive indicators included decreased nitrogen levels and increases in dissolved oxygen.


Climate change

The Chesapeake Bay is already experiencing the effects of climate change. Key among these is sea level rise: water levels in the bay have already risen one foot, with a predicted increase of 1.3 to 5.2 feet in the next 100 years. This has related environmental effects, causing changes in marine ecosystems, destruction of coastal marshes and wetlands, and intrusion of saltwater into otherwise brackish parts of the bay. Sea level rise also compounds the effects of
extreme weather Extreme weather or extreme climate events includes unexpected, unusual, severe, or unseasonal weather; weather at the extremes of the historical distribution—the range that has been seen in the past. Often, extreme events are based on a locat ...
on the bay, making coastal flooding as part of the events more extreme and increasing runoff from upstream in the watershed. With increases in flooding events and sea level rise, the 11,600 miles of coastline, which include significant historic buildings and modern infrastructure, will be at risk of erosion. Already islands like
Holland Island Holland Island was a marshy, rapidly eroding island in the Chesapeake Bay, in Dorchester County, Maryland, west of Salisbury. The island was once inhabited by watermen and farmers but has since been abandoned as sinking of the land's surface ...
have disappeared due to the rising sea levels. Beyond sea level rise, other changes in the marine ecosystem due to climate change, such as ocean acidification and temperature increases, will put increasing pressure on marine life. Projected effects include decreasing dissolved oxygen, more acidic waters making it harder for shellfish to maintain shells, and changing the seasonal cycles important for breeding and other lifecycle activities. Seasonal shifts and warmer temperatures also mean that there is a greater likelihood of pathogens to stay active in the ecosystem. Climate change may worsen hypoxia. However, compared to the current effects of nutrient pollution and algal blooms, climate change’s effect to increase hypoxia is relatively small. Warmer waters can hold less dissolved oxygen. Therefore, as the Bay warms, there may be a longer duration of hypoxia each summer season in the deep central channel of the Bay. However, comparing the effects of climate change and nutrient pollution, reduced nutrient pollution would increase oxygen concentrations more dramatically than if climate change were to level out. Climate change adaptation and mitigation programs in
Maryland Maryland ( ) is a state in the Mid-Atlantic region of the United States. It shares borders with Virginia, West Virginia, and the District of Columbia to its south and west; Pennsylvania to its north; and Delaware and the Atlantic Ocean t ...
and
Virginia Virginia, officially the Commonwealth of Virginia, is a state in the Mid-Atlantic and Southeastern regions of the United States, between the Atlantic Coast and the Appalachian Mountains. The geography and climate of the Commonwealth are ...
often include significant programs to address the communities in the Chesapeake Bay. Key infrastructure in Virginia, such as the port of
Norfolk Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the Nor ...
, and major agriculture and fishing industries of the Eastern Shore of Maryland will be directly impacted by the changes in the Bay.


Scientific research

Researchers work in the Chesapeake Bay to collect information about water quality, plant and animal abundances, shoreline erosion, tides, waves, and harmful algal blooms. For example, the Virginia Institute of Marine Science monitors the abundance of submerged aquatic vegetation in the shallow areas of the Chesapeake Bay each summer. Many organizations run continuous monitoring programs. Monitoring programs set out instruments at fixed stations on
buoys A buoy () is a floating device that can have many purposes. It can be anchored (stationary) or allowed to drift with ocean currents. Types Navigational buoys * Race course marker buoys are used for buoy racing, the most prevalent form of yac ...
, moorings, and docks throughout the Bay to record things like temperature, salinity, chlorophyll-a concentration, dissolved oxygen, and turbidity over time. Organizations actively collecting data in the Chesapeake Bay include, but are not limited to: * Chesapeake Bay National Estuarine Research Reserve in Maryland * Chesapeake Bay National Estuarine Research Reserve in Virginia * Chesapeake Bay Program *Hampton Roads Sanitation District * Maryland Department of Natural Resources * NASA GSFC Ocean Biology group *NASA GSFC Applied Sciences group (Water Resources and Human Health areas) * NOAA Chesapeake Bay Office * Old Dominion University’s Earth and Ocean Sciences Department * Smithsonian Environmental Research Center *
United States Geological Survey The United States Geological Survey (USGS), formerly simply known as the Geological Survey, is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, ...
*
University of Maryland Center for Environmental Science With 1925 origins as a research station on Solomons Island, the University of Maryland Center for Environmental Science (UMCES) is the only scientific research center within the University System of Maryland. In 1973 it became the Center for Envi ...
*Virginia Department of Environmental Quality * Virginia Department of Health * Virginia Institute of Marine Science *
Virginia Marine Resources Commission The Virginia Marine Resources Commission is a state agency charged with overseeing Virginia's marine and aquatic resources, and its tidal waters and homelands. One of the primary functions of the Commission is to zone water areas for outdoor sw ...


Underwater archaeology

Underwater archaeology is a subfield of archaeology that focuses on the exploration of submerged archaeological sites in seas, rivers, and other bodies of water. In 1988, the Maryland Maritime Archeology Program (MMAP) was established with the goal to manage and explore the various underwater archaeological sites that line the Chesapeake Bay. This was in response to the National Abandoned Shipwreck Act passed in 1987, which gave ownership of historically significant shipwrecks to those states with proper management programs. Water makes up 25% of the State of Maryland and there are over 550 submerged archaeological sites that have been located across the Chesapeake Bay and its surrounding watersheds. Ranging from 12,000-year-old, precolonial native settlements to shipwrecks from as recent as World War II, the MMAP researches thousands of years worth of history in these archaeological sites. Susan Langley has been Maryland's State Underwater Archaeologist, one of only nine state-appointed underwater archaeologists in the United States, since assuming the role in 1995. Before Langley was hired, only 1% of the underwater archaeological sites in the bay area had been examined. Over the next 10 years, Langley made significant improvements to the MMAP's marine technology, allowing her and her team to explore 34% of the underwater archaeological sites by 2004.


Location and research processes

The Chesapeake Bay watershed has been heavily impacted by natural forces such as erosion, tides, and a history of hurricanes and other storms. Along with environmental factors, the bay has been negatively impacted by humans since being settled in the 17th century, bringing with them problems like pollution, construction, and destruction of the environment. All of these circumstances have made it increasingly difficult for the MMAP to identify potential underwater archaeological sites. As sea levels rise and historically significant areas are sunk and covered in sediment, the MMAP relies on various pieces of equipment to locate these man-made anomalies but also ensure that the material being examined is kept intact. Using marine magnetometers(detects iron/absent space),
side-scan sonar Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the se ...
,(detects objects on sea floor), along with precise global positioning systems, Langley and the MMAP have been much more successful in locating submerged archaeological sites. After locating the site, Langley and her team have a strict process in order to preserve the site and its contents, allowing more accurate and thorough research to be conducted. The remains of nearly every site have been submerged in saltwater for sometimes centuries, the integrity of shipwrecks and other materials are fragile and careful precaution must be used when working with them. Taking photos and videos, creating maps, and constructing models are all a part of the process of preserving remains. Susan Langley notes herself, “If you have only ten percent of a ship’s hull, you can reconstruct the ship. Construction techniques can tell us about the people who built the vessels, artifacts can tell us about the people who profited from the ship’s trade, and eco-facts—evidence of insect infestation and organic remains, such as seeds, that are preserved in anaerobic, muddy environments—can tell us about the climate and season when a ship sank." Still, the MMAP makes it a point to publish their data and information once a site is officially identified; however, the details of the location are left out to sway would-be looters, who have plagued marine archaeologists for decades.


Significant sites

Altogether there are more than 1,800 ship and boat wrecks that scatter the bottom of the Chesapeake Bay and its surrounding waterways. Dozens of precolonial era canoes and artifacts have been extracted from the bay, helping to portray a better picture of the lives of Native Americans (e.g., Powhatan, Pamunkey, Nansemond) In 2014, underwater archaeologists identified the skull of a prehistoric
mastodon A mastodon ( 'breast' + 'tooth') is any proboscidean belonging to the extinct genus ''Mammut'' (family Mammutidae). Mastodons inhabited North and Central America during the late Miocene or late Pliocene up to their extinction at the end of the ...
, which through carbon dating was found to be 22,000 years old. Along with the skull, a carved blade was also discovered in the same area. Unable to accurately carbon date the stone tool, archaeologists looked at similar styles of blade carving in order to gauge when it was made. The technique was similar to the Solutrean tools that were crafted in Europe between 22,000 and 17,000 years ago and it was noted that the stone tool must be at least 14,000 years old. The Solutrean hypothesis challenges the previous theory regarding the first inhabitants of North America, whereas it is commonly accepted amongst anthropologists that the Clovis people were the first to settle the region somewhere around 13,000 years ago. There is some controversy surrounding these findings; many anthropologists have disputed this, claiming that the environment and setting make properly identifying the origins of these artifacts nearly impossible. The
Chesapeake Bay Flotilla The Chesapeake Bay Flotilla was a motley collection of barges and gunboats that the United States assembled under the command of Joshua Barney, an 1812 privateer captain, to stall British attacks in the Chesapeake Bay which came to be known as ...
, which was constructed using shallow barges and ships to provide a blockade to the British during the
War of 1812 The War of 1812 (18 June 1812 – 17 February 1815) was fought by the United States of America and its indigenous allies against the United Kingdom and its allies in British North America, with limited participation by Spain in Florida. It be ...
. After holding strong for some months, the British eventually dispersed the flotilla and dozens of these vessels were burnt and sunk. Starting in 1978, there were numerous expeditions launched in hopes of successfully discovering what was left of the Chesapeake Bay Flotilla. Since then, hundreds of artifacts and remains have been extracted from the submerged ships such as weapons, personal items, and many other objects. Underwater archaeologists have also been successful in constructing accurate models and maps of the wreckage amongst the sea floor. In October 1774, a British merchant ship arrived at the port of Annapolis loaded with tea disguised as linens and garments. The tea was hidden by the British to avoid conflict with the colonists as the recently imposed tea tax had created hostility and uncertainty among the colonies. Named '' Peggy Stewart,'' the British vessel arrived and attempted to tax the colonists for the purchased tea. The colonists refused to pay the tax and after a few days of public meetings, the colonists decided to burn ''Peggy Stewart'' and the contents of it. The British ship was sunk in what became known as the 'Annapolis Tea Party' and has since become an important site for underwater archaeologists in the Chesapeake Bay. In 1949, after the Nazi's defeat in World War 2, the United States seized a German U-1105 built with sonar-evading rubber sheathing for study purposes. It was sunk the same year in the Potomac River off of the Chesapeake Bay following a high explosives test hosted by the U.S. Navy and has since been a popular site for underwater archaeologists. Maryland has controlled the majority of underwater archaeology research around the Chesapeake Bay; however, Virginia's Department of Historic Resources has had a State Underwater Archaeologist since the 1970s. In 1982, the Virginia Department of Historic Resources along with the first State Underwater Archaeologist, John Broadwater, led an expedition to explore and research a sunken fleet of Revolution-era battleships. In September 1781, during the Revolutionary War, the British intentionally sunk more than a dozen ships in the York River, near the mouth of the Chesapeake Bay. Led by Lord Charles Cornwallis, a fleet of British ships was pushed back towards the rivers of the Chesapeake, in a desperate attempt to avoid surrendering, Cornwallis began burning and sinking his own vessels with the hopes of stalling the incoming French and American ships. Cornwallis was eventually forced to surrender on October 19 and the ships along with its contents were at the bottom of the York River. One of the British ships, called Betsy, has been explored more than any other and over 5,000 relics were removed from Betsy on their original expedition in 1982, including weapons, personal objects, and some valuable metals. Broadwater and his team were awarded a 20-page article in the magazine '' National Geographic'' for their findings. Virginia has recently been granted funding for further research of these sunken vessels and expeditions are currently underway with the goal to fully explore this destroyed fleet of British ships. Unfortunately, following the publicity of these sunken ships, many divers have taken it upon themselves to explore the wreckage for 'treasure'.


Publications

There are several magazines and publications that cover topics directly related to the Chesapeake Bay and life and tourism within the Bay region. *The ''Bay Journal'' provides environmental news for the Chesapeake Bay watershed region. *''Bay Weekly'' is the Chesapeake Bay region's independent newspaper. *'' The Capital'', a newspaper based in Annapolis, reports about news pertaining to the Western Shore of Maryland and the Annapolis area. *'' Chesapeake Bay Magazine'' and ''PropTalk'' focus on powerboating in the Bay, and ''SpinSheet'' focuses on sailing. *''What's Up'' Magazine is a free monthly publication with special issues focused on Annapolis and the Eastern Shore.


Cultural depictions


In literature

* '' Beautiful Swimmers: Watermen, Crabs and the Chesapeake Bay'' (1976), a Pulitzer Prize-winning non-fiction book by William W. Warner about the Chesapeake Bay, blue crabs, and watermen. * ''
Chesapeake Chesapeake often refers to: *Chesapeake people, a Native American tribe also known as the Chesepian * The Chesapeake, a.k.a. Chesapeake Bay *Delmarva Peninsula, also known as the Chesapeake Peninsula Chesapeake may also refer to: Populated plac ...
'' (1978), a novel by author
James A. Michener James Albert Michener ( or ; February 3, 1907 – October 16, 1997) was an American writer. He wrote more than 40 books, most of which were long, fictional family sagas covering the lives of many generations in particular geographic locales and ...
. *''Chesapeake Requiem: A Year with the Watermen of Vanishing Tangier Island'' (2018), by Earl Swift, a New York Times bestselling nonfiction book about the crabbing community of Chesapeake Bay. * ''
Dicey's Song ''Dicey's Song'' is a novel by Cynthia Voigt. It won the Newbery Medal for excellence in United States, American children's literature in 1983. Plot Picking up where ''Homecoming (novel), Homecoming'' left off, Dicey Tillerman and her three sibli ...
'' (1983) and the rest of
Cynthia Voigt Cynthia Voigt (born February 25, 1942) is an American writer of books for young adults dealing with various topics such as adventure, mystery, racism and child abuse. Her first book in the Tillerman family series, ''Homecoming'', was nominated ...
's Tillerman series are set in Crisfield on the Chesapeake Bay.* John Barth wrote two novels featuring Chesapeake Bay * '' Jacob Have I Loved'' (1980) by Katherine Paterson, winner of the 1981 Newbery Medal. This is a novel about the relationship between two sisters in a waterman family who grow up on an island in the Bay. * '' Patriot Games'' (1987), in which protagonist Jack Ryan lives on the fictional Peregrine Cliffs overlooking the Chesapeake Bay, and '' Without Remorse'' (1993), in which protagonist John Kelly (later known as John Clark when he goes to work for the
CIA The Central Intelligence Agency (CIA ), known informally as the Agency and historically as the Company, is a civilian foreign intelligence service of the federal government of the United States, officially tasked with gathering, processing, ...
), lives on a boat and an island in the Bay, both by
Tom Clancy Thomas Leo Clancy Jr. (April 12, 1947 – October 1, 2013) was an American novelist. He is best known for his technically detailed espionage and military-science storylines set during and after the Cold War. Seventeen of his novels have b ...
. * ''
Red Kayak ''Red Kayak'' is a young adult novel by American author Priscilla Cummings. It was first published in 2004 and tells the story of a teenager who feels partially responsible for the death of a three-year-old, and the moral dilemma of whether to te ...
'' (2004) by Priscilla Cummings portrays class conflict between waterman people and wealthy newcomers. *'' Sabbatical: A Romance'' (1982) centered on a yacht race through the Bay, and '' The Tidewater Tales'' (1987) detailed a married couple telling stories to each other as they cruise the Bay, both novels by John Barth. *''The Oyster Wars of Chesapeake Bay'' (1997) by John Wennersten, on the Oyster Wars in the decades following the Civil War.


In film

* '' The Bay'', a 2012 found footage-style eco-horror movie about a pandemic due to deadly pollution from chicken factory farm run-off and mutant isopods and aquatic parasites able to infect humans. * ''Expedition Chesapeake, A Journey of Discovery'', a 2019 film starring
Jeff Corwin Jeffrey Corwin (born July 11, 1967) is an American biologist and wildlife conservationist, known for hosting Disney Channel's '' Going Wild with Jeff Corwin'', ''The Jeff Corwin Experience'' on Animal Planet, ABC's '' Ocean Mysteries with Jef ...
created by The Whitaker Center for Science and the Arts.


In TV

* In '' Chesapeake Shores'', the O'Brien family lives in a small town in the Bay, not far from Baltimore. * In ''
MeatEater ''MeatEater'' is a non-fiction outdoors hunting television series in the United States on Netflix starring Steven Rinella. The show first aired on January 1, 2012 and is produced by Zero Point Zero Production. Episodes Season 1 (2012) Sea ...
'' by Steven Rinella, Season 8, Episode 3-4 "Ghosts of the Chesapeake" features the Chesapeake Bay eastern shore.


Other media

* Singer and songwriter Tom Wisner recorded several albums, often about the Chesapeake Bay. '' The Boston Globe'' wrote that Wisner "always tried to capture the voice of the water and the sky, of the rocks and the trees, of the fish and the birds, of the gods of nature he believed still watched over it all." He was known as the ''Bard of the Chesapeake Bay.'' * The Chesapeake Bay is referenced in the hit musical
Hamilton Hamilton may refer to: People * Hamilton (name), a common British surname and occasional given name, usually of Scottish origin, including a list of persons with the surname ** The Duke of Hamilton, the premier peer of Scotland ** Lord Hamilto ...
, in the song "
Yorktown (The World Turned Upside Down) "Yorktown (The World Turned Upside Down)" is the twentieth song from Act 1 of the musical ''Hamilton'', based on the life of Alexander Hamilton, which premiered on Broadway in 2015. Lin-Manuel Miranda wrote both the music and lyrics to the song. I ...
." It describes the famous
Battle of Yorktown The Siege of Yorktown, also known as the Battle of Yorktown, the surrender at Yorktown, or the German battle (from the presence of Germans in all three armies), beginning on September 28, 1781, and ending on October 19, 1781, at Yorktown, Virgi ...
, the last battle in the Revolutionary War. When describing the US army's plan for attack, Hamilton sings: "When we finally drive the British away, Lafayette is there waiting in Chesapeake Bay!"


See also

*
Chesapeake Bay Interpretive Buoy System Chesapeake Bay Interpretive Buoy System (CBIBS) is a network of observational buoys that are deployed throughout the Chesapeake Bay to observe the estuary's changing conditions and to serve as way points along the Captain John Smith Chesapeake Nat ...
* Chesapeake Bay Retriever *
Chesapeake Climate Action Network The Chesapeake Climate Action Network (CCAN) is a grassroots nonprofit organization dedicated to fighting global warming in Maryland, Virginia, and the District of Columbia. The organization's mission is to foster a rapid societal switch to ...
*
Chesepian The Chesepian or Chesapeake were a Native American tribe who inhabited the area now known as South Hampton Roads in the U.S. state of Virginia. They occupied an area which is now the Norfolk, Portsmouth, Chesapeake, and Virginia Beach areas. To ...
* Chessie (sea monster) * Coastal and Estuarine Research Federation * Great Ireland *
List of islands in Maryland Maryland has 281 named islands within its many waters and waterways, including the Atlantic ocean; the Chesapeake bay and its many tributary tide, tidal rivers, creeks and bays; as well as within larger whitewater rivers like the upper Potomac rive ...
(with the islands in the Bay) *
National Estuarine Research Reserve The National Estuarine Research Reserve System is a network of 29 protected areas established by partnerships between the National Oceanic and Atmospheric Administration (NOAA) and coastal states. The reserves represent different biogeographic r ...
* Old Bay Seasoning


Notes


References


Further reading

* Cleaves, E.T. et al. (2006). ''Quaternary geologic map of the Chesapeake Bay 4º x 6º quadrangle, United States'' iscellaneous Investigations Series; Map I-1420 (NJ-18) Reston, VA: U.S. Department of the Interior, U.S. Geological Survey.
Crawford, S. 2012. Terrapin Bay Fishing. Chesapeake Bay Tides and Currents
* Meyers, Debra and Perrealt, Melanie (eds.) (2014). ''Order and Civility in the Early Modern Chesapeake.'' Lanham, MD: Rowman and Littlefield. * Phillips, S.W., ed. (2007). ''Synthesis of U.S. Geological Survey science for the Chesapeake Bay ecosystem and implications for environmental management'' .S. Geological Survey Circular 1316 Reston, VA: U.S. Department of the Interior, U.S. Geological Survey. * Thomas, William G., III
"The Chesapeake Bay."
''Southern Spaces'', April 16, 2004. * William W. Warner, ''Beautiful Swimmers'', about the history, ecology and anthropology of the Chesapeake Bay, published 1976


External links




Chesapeake Bay Program

University of Maryland Center for Environmental Science
Research and science application activities emphasizing Chesapeake Bay and its watershed.
Maryland Department of Natural Resources Eyes on the Bay
Real-time and historical Chesapeake Bay water quality and satellite data. {{Authority control 01 Environment of the Mid-Atlantic states Estuaries of Maryland Estuaries of Virginia Intracoastal Waterway Marine ecoregions Ramsar sites in the United States Estuaries of the United States Eutrophication