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Seventy One
Seventy One (also known as Garner Run) is a tributary of Elk Creek in Elk County, Pennsylvania, in the United States. It is approximately long and flows through St Marys. The watershed of the stream has an area of . The amounts of aluminum and iron in the stream are too small to be detectable. However, there are detectable amounts of manganese, acidity, and alkalinity in the stream. A portion of the stream's watershed is part of a greenway. A coal bed also is found near it. Course Seventy One begins at the top of a hill in St Marys. It flows southeast for a short distance before turning south-southwest for several tenths of a mile. It then receives an unnamed tributary from the right and then turns south-southwest for several tenths of a mile, entering a valley. The stream then receives another unnamed tributary and turns south for more than a mile. At the end of its valley, it crosses a railroad line and reaches its confluence with Elk Creek. Seventy One joins Elk Run upstrea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clarion River
The Clarion River is a tributary of the Allegheny River, approximately 110 mi (177 km) long, in west central Pennsylvania in the United States. It drains a rugged area of the Allegheny Plateau in the Ohio River watershed, flowing through narrow serpentine valleys and hardwood forests. Course The river is formed at Johnsonburg in central Elk County by the confluence of its East and West Branches. The East Branch, approximately 15 mi (24 km) long, rises in northeastern Elk County and flows southwest through East Branch Clarion River Lake to join the West Branch. The river flows generally west-southwest across western Pennsylvania in a tight meandering course past Ridgway and Clarion. It joins the Allegheny from the east in western Clarion County approximately 5 mi (8 km) south of Emlenton. The Clarion is a designated part of the National Wild and Scenic River program. Discharges History Before 1817, the Clarion River was more commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Maximum Daily Load
A total maximum daily load (TMDL) is a regulatory term in the U.S. Clean Water Act, describing a plan for restoring impaired waters that identifies the maximum amount of a pollutant that a body of water can receive while still meeting water quality standards. State and federal agency responsibilities The Clean Water Act requires that state environmental agencies complete TMDLs for impaired waters and that the United States Environmental Protection Agency (EPA) review and approve / disapprove those TMDLs. Because both state and federal governments are involved in completing TMDLs, the TMDL program is an example of cooperative federalism. If a state doesn't take action to develop TMDLs, or if EPA disapproves state-developed TMDLs, the EPA is responsible for issuing TMDLs. EPA published regulations in 1992 establishing TMDL procedures. Application of TMDLs has broadened significantly in the last decade to include many watershed-scale efforts, including the Chesapeake Bay TMDL. TM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of Elk County, Pennsylvania
A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague. Rivers are part of the water cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Rivers Of Pennsylvania
This is a list of streams and rivers in the U.S. state of Pennsylvania. By drainage basin This list is arranged by drainage basin, with respective tributaries indented under each larger stream's name. Delaware Bay Chesapeake Bay *''Elk River (MD)'' **Big Elk Creek ** Little Elk Creek *''North East River (MD) ** North East Creek * Gunpowder River Susquehanna River *Susquehanna River ** Deer Creek ** Octoraro Creek ***West Branch Octoraro Creek **** Stewart Run ***East Branch Octoraro Creek **** Muddy Run ** Conowingo Creek ** Fishing Creek (Lancaster County) ** Muddy Creek (Susquehanna River tributary) *** North Branch Muddy Creek ***South Branch Muddy Creek **Tucquan Creek ** Otter Creek ** Pequea Creek ***Big Beaver Creek *** Little Beaver Creek ** Conestoga River *** Little Conestoga Creek *** Mill Creek ***Lititz Run *** Cocalico Creek **** Hammer Creek **** Middle Creek **** Indian Run **** Little Cocalico Creek *** Muddy Creek (Conestoga River tributary) **** ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greenway (landscape)
A greenway is usually a shared-use path along a strip of undeveloped land, in an urban or rural area, set aside for recreational use or environmental protection. Greenways are frequently created out of disused railways, canal towpaths, utility or similar rights of way, or derelict industrial land. Greenways also can also be linear parks, and can serve as wildlife corridors. The path's surface may be paved and often serves multiple users: walkers, runners, bicyclists, skaters and hikers. A characteristic of greenways, as defined by the European Greenways Association, is "ease of passage": that is that they have "either low or zero gradient", so that they can be used by all "types of users, including mobility impaired people". In Southern England, the term also refers to ancient trackways or green lanes, especially those found on chalk downlands, like the Ridgeway. Definition Greenways are vegetated, linear, and multi-purpose. They incorporate a footpath and/or bikewa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Albert Ashburner
Charles Albert Ashburner (February 9, 1854 – December 24, 1889) was an American geologist. Formative years Charles Albert Ashburner was born on February 9, 1854, in Philadelphia. He graduated from the University of Pennsylvania in 1874. During the summer of 1872 he was engaged on the survey of the Delaware River. Career Following his graduation from the University of Pennsylvania, Ashburner accepted a position with the lighthouse survey service. In 1874, the geological survey of Pennsylvania was reorganized with the appointment of Professor J. P. Lesley as state geologist; Ashburner subsequently resigned from the service to become an assistant on the survey. Ashburner was employed during the latter part of 1874 in the surveys of Mifflin and Juniata counties. In 1875, he was appointed assistant geologist, and placed in charge of the surveys in McKean, Elk, Forest, and Cameron counties. In 1880, he was appointed geologist in charge of the survey of the anthracite Ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coal Bed
Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. Vast deposits of coal originate in former wetlands called coal forests that covered much of the Earth's tropical land areas during the late Carboniferous ( Pennsylvanian) and Permian times. Many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras. Coal is used primarily as a fuel. While coal has been known and used for thousands of years, its usage was limited until the Industrial Revolution. With the invention of the steam engine, coal consumption increased. In 2020, coal supplied about a quarter of the world's primary energy and over a third of its electricity. Some iron a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Source
The headwaters of a river or stream is the farthest place in that river or stream from its estuary or downstream confluence with another river, as measured along the course of the river. It is also known as a river's source. Definition The United States Geological Survey (USGS) states that a river's "length may be considered to be the distance from the mouth to the most distant headwater source (irrespective of stream name), or from the mouth to the headwaters of the stream commonly known as the source stream". As an example of the second definition above, the USGS at times considers the Missouri River as a tributary of the Mississippi River. But it also follows the first definition above (along with virtually all other geographic authorities and publications) in using the combined Missouri—lower Mississippi length figure in lists of lengths of rivers around the world. Most rivers have numerous tributaries and change names often; it is customary to regard the longes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Level
Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardised geodetic datum A geodetic datum or geodetic system (also: geodetic reference datum, geodetic reference system, or geodetic reference frame) is a global datum reference or reference frame for precisely representing the position of locations on Earth or other p ...that is used, for example, as a chart datum in cartography and Navigation, marine navigation, or, in aviation, as the standard sea level at which atmospheric pressure is measured to Calibration, calibrate altitude and, consequently, aircraft flight levels. A common and relatively straightforward mean sea-level standard is instead the midpoint between a Tide, mean low and mean high tide at a particular location. Sea levels can be affected by many factors and are known to hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Mouth
A river mouth is where a river flows into a larger body of water, such as another river, a lake/reservoir, a bay/ gulf, a sea, or an ocean. At the river mouth, sediments are often deposited due to the slowing of the current reducing the carrying capacity of the water. The water from a river can enter the receiving body in a variety of different ways. The motion of a river is influenced by the relative density of the river compared to the receiving water, the rotation of the earth, and any ambient motion in the receiving water, such as tides or seiches. If the river water has a higher density than the surface of the receiving water, the river water will plunge below the surface. The river water will then either form an underflow or an interflow within the lake. However, if the river water is lighter than the receiving water, as is typically the case when fresh river water flows into the sea, the river water will float along the surface of the receiving water as an overflow. Al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discharge (hydrology)
In hydrology, discharge is the volumetric flow rate of water that is transported through a given cross-sectional area. It includes any suspended solids (e.g. sediment), dissolved chemicals (e.g. CaCO3(aq)), or biologic material (e.g. diatoms) in addition to the water itself. Terms may vary between disciplines. For example, a fluvial hydrologist studying natural river systems may define discharge as streamflow, whereas an engineer operating a reservoir system may equate it with outflow, contrasted with inflow. Theory and calculation A discharge is a measure of the quantity of any fluid flow over unit time. The quantity may be either volume or mass. Thus the water discharge of a tap (faucet) can be measured with a measuring jug and a stopwatch. Here the discharge might be 1 litre per 15 seconds, equivalent to 67 ml/second or 4 litres/minute. This is an average measure. For measuring the discharge of a river we need a different method and the most common is the 'area-velocity' method. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvania Department Of Environmental Protection
The Pennsylvania Department of Environmental Protection (DEP) is the agency in the U.S. state of Pennsylvania responsible for protecting and preserving the land, air, water, and public health through enforcement of the state's environmental laws. It was created by Act 18 of 1995, which split the Department of Environmental Resources into the Department of Environmental Protection and the Department of Conservation and Natural Resources. Its current acting secretary is Ramez Ziadeh. The Department of Environmental Resources was created by Act 275 of 1970, which abolished the Department of Forest and Waters. The Department of Forest and Waters was created by the General Assembly in 1901. The Department of Environmental Protection is charged with the responsibility for development of a balanced ecological system incorporating social, cultural, and economic needs of the commonwealth through development and protection. The department is responsible for the state's land, air, and water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
