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Canals or artificial waterways are waterways or
engineered Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specializ ...
channel Channel, channels, channeling, etc., may refer to: Geography * Channel (geography), in physical geography, a landform consisting of the outline (banks) of the path of a narrow body of water. Australia * Channel Country, region of outback Austral ...
s built for drainage management (e.g. flood control and irrigation) or for conveyancing
water transport Maritime transport (or ocean transport) and hydraulic effluvial transport, or more generally waterborne transport, is the transport of people (passengers) or goods (cargo) via waterways. Freight transport by sea has been widely used throu ...
vehicles (e.g. water taxi). They carry free, calm surface flow under atmospheric pressure, and can be thought of as artificial rivers. In most cases, a canal has a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as ''slack water levels'', often just called ''levels''. A canal can be called a ''navigation canal'' when it parallels a natural river and shares part of the latter's
discharge Discharge may refer to Expel or let go * Discharge, the act of firing a gun * Discharge, or termination of employment, the end of an employee's duration with an employer * Military discharge, the release of a member of the armed forces from serv ...
s and drainage basin, and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley. A canal can cut across a
drainage divide A drainage divide, water divide, ridgeline, watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins. On rugged land, the divide lies along topographical ridges, and may be in the form of a singl ...
atop a
ridge A ridge or a mountain ridge is a geographical feature consisting of a chain of mountains or hills that form a continuous elevated crest for an extended distance. The sides of the ridge slope away from the narrow top on either side. The line ...
, generally requiring an external water source above the highest elevation. The best-known example of such a canal is the Panama Canal. Many canals have been built at elevations, above valleys and other waterways. Canals with sources of water at a higher level can deliver water to a destination such as a city where water is needed. The Roman Empire's aqueducts were such water supply canals.


Types of artificial waterways

A ''navigation'' is a series of channels that run roughly parallel to the valley and
stream bed A stream bed or streambed is the bottom of a stream or river (bathymetry) or the physical confine of the normal water flow (Channel (geography), channel). The lateral confines or channel margins are known as the stream Bank (geography), banks ...
of an unimproved river. A navigation always shares the drainage basin of the river. A vessel uses the calm parts of the river itself as well as improvements, traversing the same changes in height. A true ''canal'' is a channel that cuts across a
drainage divide A drainage divide, water divide, ridgeline, watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins. On rugged land, the divide lies along topographical ridges, and may be in the form of a singl ...
, making a navigable channel connecting two different drainage basins. In gardening and landscaping, especially historically, a canal is an artificial piece of water, typically long, thin, and straight-sided, fed by a stream that is diverted and dammed. They are typical of the
French formal garden The French formal garden, also called the (), is a style of garden based on symmetry and the principle of imposing order on nature. Its epitome is generally considered to be the Gardens of Versailles designed during the 17th century by the ...
style of the 17th century, and the Dutch garden variant which was influential in England. The example in the restored Westbury Court Garden, of c. 1700, is long. Most commercially important canals of the first half of the 19th century were a little of each, using rivers in long stretches, and divide crossing canals in others. This is true for many canals still in use. Canals are an efficient way of traveling as it was easier for people to get to areas faster than horse wagons.


Structures used in artificial waterways

Both navigations and canals use
engineered Engineering is the use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings. The discipline of engineering encompasses a broad range of more specializ ...
structures to improve navigation: * weirs and dams to raise river water levels to usable depths; * looping descents to create a longer and gentler channel around a stretch of rapids or falls; * locks to allow ships and barges to ascend/descend. Since they cut across drainage divides, canals are more difficult to construct and often need additional improvements, like
viaduct A viaduct is a specific type of bridge that consists of a series of arches, piers or columns supporting a long elevated railway or road. Typically a viaduct connects two points of roughly equal elevation, allowing direct overpass across a wide v ...
s and aqueducts to bridge waters over streams and roads, and ways to keep water in the channel.


Types of canals

There are two broad types of canal: * Waterways: canals and navigations used for carrying vessels transporting goods and people. These can be subdivided into two kinds: :* Those connecting existing lakes, rivers, other canals or seas and oceans. :* Those connected in a city network: such as the ''
Canal Grande The Grand Canal ( it, Canal Grande ; vec, Canal Grando, anciently ''Canałasso'' ) is a channel in Venice, Italy. It forms one of the major water-traffic corridors in the city. One end of the canal leads into the lagoon near the Santa Lucia ...
'' and others of
Venice Venice ( ; it, Venezia ; vec, Venesia or ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 small islands that are separated by canals and linked by over 400  ...
; the ''
gracht ''Gracht'' (; plural: ''grachten'') is a Dutch word for a canal within a city. ''Grachten'' often have a round shape, and form a circle around the city cores in the Netherlands, Belgium, and northern Germany. Outside the Netherlands, the word '' ...
en'' of Amsterdam or Utrecht, and the waterways of Bangkok. * Aqueducts: water supply canals that are used for the conveyance and delivery of potable water, municipal uses, hydro power canals and agriculture irrigation.


Importance

Historically canals were of immense importance to commerce and the development, growth and vitality of a civilization. In 1855 the
Lehigh Canal The Lehigh Canal, or the Lehigh Navigation Canal, is a navigable canal that begins at the mouth of Nesquehoning Creek on the Lehigh River in eastern Pennsylvania. It was built in two sections over a span of twenty years, beginning in 1818. The low ...
carried over 1.2 million tons of anthracite coal; by the 1930s the company which built and operated it over a century pulled the plug. The few canals still in operation in our modern age are a fraction of the numbers that once fueled and enabled economic growth, indeed were practically a prerequisite to further urbanization and industrialization. For the movement of bulk raw materials such as coal and ores are difficult and marginally affordable without water transport. Such raw materials fueled the industrial developments and new
metallurgy Metallurgy is a domain of materials science and engineering that studies the physical and chemical behavior of metallic elements, their inter-metallic compounds, and their mixtures, which are known as alloys. Metallurgy encompasses both the sc ...
resulting of the spiral of increasing mechanization during 17th–20th century, leading to new research disciplines, new industries and economies of scale, raising the standard of living for any industrialized society.


The surviving canals

Most ship canals today primarily service bulk cargo and large ship transportation industries, whereas the once critical smaller inland waterways conceived and engineered as boat and barge canals have largely been supplanted and filled in, abandoned and left to deteriorate, or kept in service and staffed by state employees, where dams and locks are maintained for flood control or pleasure boating. Their replacement was gradual, beginning first in the United States in the mid-1850s where canal shipping was first augmented by, then began being replaced by using ''much faster'', less geographically constrained & limited, and generally cheaper to maintain railways. By the early 1880s, canals which had little ability to economically compete with rail transport, were off the map. In the next couple of decades, coal was increasingly diminished as the heating fuel of choice by oil, and growth of coal shipments leveled off. Later, after World War I when motor-trucks came into their own, the last small U.S. barge canals saw a steady decline in cargo ton-miles alongside many railways, the flexibility and steep slope climbing capability of lorries taking over cargo hauling increasingly as road networks were improved, and which also had the freedom to make deliveries well away from rail lined road beds or ditches in the dirt which couldn't operate in the winter. The longest extant canal today, the Grand Canal in northern China, still remains in heavy use, especially the portion south of the Yellow River. It stretches from Beijing to Hangzhou at 1,794 kilometres (1,115 miles).


Construction

Canals are built in one of three ways, or a combination of the three, depending on available water and available path: ;Human made streams * A canal can be created where no stream presently exists. Either the body of the canal is dug or the sides of the canal are created by making dykes or levees by piling dirt, stone, concrete or other building materials. The finished shape of the canal as seen in cross section is known as the ''canal prism''. The water for the canal must be provided from an external source, like streams or reservoirs. Where the new waterway must change elevation engineering works like locks, lifts or elevators are constructed to raise and lower vessels. Examples include canals that connect valleys over a higher body of land, like
Canal du Midi The Canal du Midi (; ) is a long canal in Southern France (french: le Midi). Originally named the ''Canal royal en Languedoc'' (Royal Canal in Languedoc) and renamed by French revolutionaries to ''Canal du Midi'' in 1789, the canal is considere ...
,
Canal de Briare The Briare Canal (french: Canal de Briare, ) is one of the oldest canals in France. Its construction started in 1604. It was the first summit level canal in Europe that was built using pound locks, connecting the Rhone-Saône and Seine valleys. ...
and the Panama Canal. * A canal can be constructed by dredging a channel in the bottom of an existing lake. When the channel is complete, the lake is drained and the channel becomes a new canal, serving both drainage of the surrounding
polder A polder () is a low-lying tract of land that forms an artificial hydrological entity, enclosed by embankments known as dikes. The three types of polder are: # Land reclaimed from a body of water, such as a lake or the seabed # Flood plains s ...
and providing transport there. Examples include the . One can also build two parallel dikes in an existing lake, forming the new canal in between, and then drain the remaining parts of the lake. The eastern and central parts of the North Sea Canal were constructed in this way. In both cases pumping stations are required to keep the land surrounding the canal dry, either pumping water from the canal into surrounding waters, or pumping it from the land into the canal. ;Canalization and navigations * A stream can be ''
canalized River engineering is a discipline of civil engineering which studies human intervention in the course, characteristics, or flow of a river with the intention of producing some defined benefit. People have intervened in the natural course and b ...
'' to make its navigable path more predictable and easier to maneuver. Canalization modifies the stream to carry traffic more safely by controlling the flow of the stream by dredging, damming and modifying its path. This frequently includes the incorporation of locks and spillways, that make the river a navigation. Examples include the
Lehigh Canal The Lehigh Canal, or the Lehigh Navigation Canal, is a navigable canal that begins at the mouth of Nesquehoning Creek on the Lehigh River in eastern Pennsylvania. It was built in two sections over a span of twenty years, beginning in 1818. The low ...
in Northeastern Pennsylvania's
coal Region The Coal Region is a region of Northeastern Pennsylvania. It is known for being home to the largest known deposits of anthracite, anthracite coal in the world with an estimated reserve of seven billion short tons. The region is typically define ...
,
Basse Saône Basse may refer to: Places * Basse (Gambia), The Gambia * Basse Santa Su, The Gambia * Basse, Netherlands * Bassé, Burkina Faso People * Éliane Basse (1899–1985), French paleontologist * Hans-Dieter von Basse (1916–1945), Oberstleutnant i ...
,
Canal de Mines de Fer de la Moselle The Canal des mines de fer de la Moselle ( en, Canal of the Iron Mines of Moselle) is a canal in north eastern France linking Metz and Thionville. It is a canalized section of the river Moselle. The canal may also be called CAMIFEMO as concocted ...
, and Aisne River. Riparian zone restoration may be required. ;Lateral canals * When a stream is too difficult to modify with ''canalization'', a second stream can be created next to or at least near the existing stream. This is called a '' lateral canal'', and may meander in a large horseshoe bend or series of curves some distance from the source waters stream bed lengthening the effective length in order to lower the ratio of rise over run (slope or pitch). The existing stream usually acts as the water source and the landscape around its banks provide a path for the new body. Examples include the Chesapeake and Ohio Canal, Canal latéral à la Loire,
Garonne Lateral Canal The Garonne (, also , ; Occitan, Catalan, Basque, and es, Garona, ; la, Garumna or ) is a river of southwest France and northern Spain. It flows from the central Spanish Pyrenees to the Gironde estuary at the French port of Bordeaux – a le ...
, Welland Canal and
Juliana Canal The Juliana Canal (Dutch and Limburgish: , , ), named after Queen Juliana of the Netherlands, is a 36 km long canal in the southern Netherlands, providing a bypass of an unnavigable section of the river Meuse between Maastricht and Maasbra ...
. Smaller transportation canals can carry barges or
narrowboat A narrowboat is a particular type of canal boat, built to fit the narrow locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution, but with the advent of the railways, commerc ...
s, while ship canals allow seagoing ships to travel to an inland port (e.g.,
Manchester Ship Canal The Manchester Ship Canal is a inland waterway in the North West of England linking Manchester to the Irish Sea. Starting at the Mersey Estuary at Eastham, near Ellesmere Port, Cheshire, it generally follows the original routes of the river ...
), or from one sea or ocean to another (e.g.,
Caledonian Canal The Caledonian Canal connects the Scottish east coast at Inverness with the west coast at Corpach near Fort William in Scotland. The canal was constructed in the early nineteenth century by Scottish engineer Thomas Telford. Route The canal r ...
, Panama Canal).


Features

At their simplest, canals consist of a trench filled with water. Depending on the
stratum In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
the canal passes through, it may be necessary to
line Line most often refers to: * Line (geometry), object with zero thickness and curvature that stretches to infinity * Telephone line, a single-user circuit on a telephone communication system Line, lines, The Line, or LINE may also refer to: Arts ...
the cut with some form of watertight material such as clay or concrete. When this is done with clay, it is known as
puddling A puddle is a small accumulation of liquid on a surface. Puddle or Puddles may also refer to: * Puddle, Cornwall, hamlet in England * ''Puddle'' (video game) * Puddle (M. C. Escher), a woodcut by M. C. Escher * Weld puddle, a crucial part of the ...
. Canals need to be level, and while small irregularities in the lie of the land can be dealt with through cuttings and embankments, for larger deviations other approaches have been adopted. The most common is the pound lock, which consists of a chamber within which the water level can be raised or lowered connecting either two pieces of canal at a different level or the canal with a river or the sea. When there is a hill to be climbed, flights of many locks in short succession may be used. Prior to the development of the pound lock in 984 AD in China by Chhaio Wei-Yo and later in Europe in the 15th century, either flash locks consisting of a single gate were used or ramps, sometimes equipped with rollers, were used to change the level. Flash locks were only practical where there was plenty of water available. Locks use a lot of water, so builders have adopted other approaches for situations where little water is available. These include boat lifts, such as the Falkirk Wheel, which use a caisson of water in which boats float while being moved between two levels; and inclined planes where a caisson is hauled up a steep railway. To cross a stream, road or valley (where the delay caused by a flight of locks at either side would be unacceptable) the valley can be spanned by a navigable aqueduct – a famous example in Wales is the Pontcysyllte Aqueduct (now a UNESCO World Heritage Site) across the valley of the River Dee. Another option for dealing with hills is to tunnel through them. An example of this approach is the Harecastle Tunnel on the
Trent and Mersey Canal The Trent and Mersey Canal is a canal in Derbyshire, Staffordshire and Cheshire in north-central England. It is a "narrow canal" for the vast majority of its length, but at the extremities to the east of Burton upon Trent and north of Middle ...
. Tunnels are only practical for smaller canals. Some canals attempted to keep changes in level down to a minimum. These canals known as
contour canal A contour canal is an artificially-dug navigable canal which closely follows the contour line of the land it traverses in order to avoid costly engineering works such as boring a tunnel through higher ground, building an embankment over lower ground ...
s would take longer, winding routes, along which the land was a uniform altitude. Other, generally later, canals took more direct routes requiring the use of various methods to deal with the change in level. Canals have various features to tackle the problem of water supply. In cases, like the Suez Canal, the canal is open to the sea. Where the canal is not at sea level, a number of approaches have been adopted. Taking water from existing rivers or springs was an option in some cases, sometimes supplemented by other methods to deal with seasonal variations in flow. Where such sources were unavailable, reservoirs – either separate from the canal or built into its course – and
back pumping The human back, also called the dorsum, is the large posterior area of the human body, rising from the top of the buttocks to the back of the neck. It is the surface of the body opposite from the chest and the abdomen. The vertebral column ru ...
were used to provide the required water. In other cases, water pumped from mines was used to feed the canal. In certain cases, extensive "feeder canals" were built to bring water from sources located far from the canal. Where large amounts of goods are loaded or unloaded such as at the end of a canal, a canal basin may be built. This would normally be a section of water wider than the general canal. In some cases, the canal basins contain wharfs and cranes to assist with movement of goods. When a section of the canal needs to be sealed off so it can be drained for maintenance
stop planks Stop may refer to: Places *Stop, Kentucky, an unincorporated community in the United States * Stop (Rogatica), a village in Rogatica, Republika Srpska, Bosnia and Herzegovina Facilities * Bus stop * Truck stop, a type of rest stop for truck dri ...
are frequently used. These consist of planks of wood placed across the canal to form a dam. They are generally placed in pre-existing grooves in the canal bank. On more modern canals, "guard locks" or gates were sometimes placed to allow a section of the canal to be quickly closed off, either for maintenance, or to prevent a major loss of water due to a canal breach. File:caen.hill.locks.in.devizes.arp.jpg, alt=A series of approximately 20 black lock gates with white ends to the paddle arms and wooden railings, each slightly higher than the one below. On the right is a path and on both side's grass and vegetation., The flight of 16 consecutive locks at
Caen Hill Caen Hill Locks () are a flight of 29 Canal lock, locks on the Kennet and Avon Canal, between Rowde and Devizes in Wiltshire, England. Description The 29 locks have a rise of 237 feet in 2 miles ( in ) or a 1 in 44 gradient. The locks come ...
on the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...
, Wiltshire. File:pontcysyllte aqueduct arp.jpg, A canal boat traverses the longest and highest aqueduct in the UK, at Pontcysyllte in Denbighshire, Wales. File:Canal of korinth greece.jpg, The Corinth Canal seen from the air. File:Miami and Erie Canal Lock photographs - DPLA - a4f6bf1bdcffd61c72c1a077104f91ed (page 1).jpg, Miami and Erie Canal Lock in Ohio, United States


History

The transport capacity of pack animals and
cart A cart or dray (Australia and New Zealand) is a vehicle designed for transport, using two wheels and normally pulled by one or a pair of draught animals. A handcart is pulled or pushed by one or more people. It is different from the flatbed tr ...
s is limited. A mule can carry an eighth-ton [] maximum load over a journey measured in days and weeks, though much more for shorter distances and periods with appropriate rest. Besides, carts need roads. Transport over water is much more efficient and cost-effective for large cargoes.


Ancient canals

The oldest known canals were irrigation canals, built in Mesopotamia circa 4000 BC, in what is now Iraq. The
Indus Valley civilization The Indus Valley Civilisation (IVC), also known as the Indus Civilisation was a Bronze Age civilisation in the northwestern regions of South Asia, lasting from 3300 BCE to 1300 BCE, and in its mature form 2600 BCE to 1900&n ...
of ancient India (circa 3000 BC) had sophisticated irrigation and storage systems developed, including the reservoirs built at Girnar in 3000 BC. This is the first time that such planned civil project had taken place in the ancient world. In Egypt, canals date back at least to the time of Pepi I Meryre (reigned 2332–2283 BC), who ordered a canal built to bypass the cataract on the Nile near Aswan. In
ancient China The earliest known written records of the history of China date from as early as 1250 BC, from the Shang dynasty (c. 1600–1046 BC), during the reign of king Wu Ding. Ancient historical texts such as the '' Book of Documents'' (early chapte ...
, large canals for river transport were established as far back as the
Spring and Autumn Period The Spring and Autumn period was a period in Chinese history from approximately 770 to 476 BC (or according to some authorities until 403 BC) which corresponds roughly to the first half of the Eastern Zhou period. The period's name derives fr ...
(8th–5th centuries BC), the longest one of that period being the Hong Gou (Canal of the Wild Geese), which according to the ancient historian
Sima Qian Sima Qian (; ; ) was a Chinese historian of the early Han dynasty (206AD220). He is considered the father of Chinese historiography for his ''Records of the Grand Historian'', a general history of China covering more than two thousand years b ...
connected the old states of Song, Zhang, Chen, Cai, Cao, and Wei. The
Caoyun System The history of canals in China connecting its major rivers and centers of agriculture and population extends from the legendary exploits of Yu the Great in his attempts control the flooding of the Yellow River to the present infrastructure project ...
of canals was essential for imperial taxation, which was largely assessed in kind and involved enormous shipments of rice and other grains. By far the longest canal was the Grand Canal of China, still the longest canal in the world today and the oldest extant one. It is long and was built to carry the Emperor Yang Guang between Zhuodu ( Beijing) and Yuhang ( Hangzhou). The project began in 605 and was completed in 609, although much of the work combined older canals, the oldest section of the canal existing since at least 486 BC. Even in its narrowest urban sections it is rarely less than wide. Greek engineers were also among the first to use canal locks, by which they regulated the water flow in the
Ancient Suez Canal The Canal of the Pharaohs, also called the Ancient Suez Canal or Necho's Canal, is the forerunner of the Suez Canal, constructed in ancient times and kept in use, with intermissions, until being closed for good in 767 AD for strategic reasons d ...
as early as the 3rd century BC.Froriep, Siegfried (1986): "Ein Wasserweg in Bithynien. Bemühungen der Römer, Byzantiner und Osmanen", ''Antike Welt'', 2nd Special Edition, pp. 39–50 (46)
There was little experience moving bulk loads by carts, while a pack-horse would .e. 'could'carry only an eighth of a ton. On a soft road a horse might be able to draw 5/8ths of a ton. But if the load were carried by a barge on a waterway, then up to 30 tons could be drawn by the same horse.
— technology historian
Ronald W. Clark William Ronald Clark, known as Ronald William Clark (2 November 1916 – 9 March 1987) was a British author of biography, fiction and non-fiction. Early life and education Clark was born in London as William Ronald Clark, the only child of bank c ...
referring to transport realities before the industrial revolution and the Canal age.''"Works of Man"'',
Ronald W. Clark William Ronald Clark, known as Ronald William Clark (2 November 1916 – 9 March 1987) was a British author of biography, fiction and non-fiction. Early life and education Clark was born in London as William Ronald Clark, the only child of bank c ...
, (1985) 352 pages, Viking Penguin, Inc, New York,
quotation p. 87: "There was little experience moving bulk loads by carts, while a packhorse would ic, meaning 'could' or 'can only'carry only an eighth of a ton. On a soft road a horse might be able to draw 5/8ths of a ton. But if the load were carried by a barge on a waterway, then up to 30 tons could be drawn by the same horse.
Hohokam Hohokam () was a culture in the North American Southwest in what is now part of Arizona, United States, and Sonora, Mexico. It existed between 300 and 1500 AD, with cultural precursors possibly as early as 300 BC. Archaeologists disagree about ...
was a society in the North American Southwest in what is now part of Arizona, United States, and
Sonora Sonora (), officially Estado Libre y Soberano de Sonora ( en, Free and Sovereign State of Sonora), is one of the 31 states which, along with Mexico City, comprise the Administrative divisions of Mexico, Federal Entities of Mexico. The state is d ...
, Mexico. Their irrigation systems supported the largest population in the Southwest by 1300 CE. Archaeologists working at a major archaeological dig in the 1990s in the Tucson Basin, along the Santa Cruz River, identified a culture and people that may have been the ancestors of the Hohokam. This prehistoric group occupied southern Arizona as early as 2000 BCE, and in the Early Agricultural Period grew corn, lived year-round in sedentary villages, and developed sophisticated irrigation canals. The large-scale Hohokam irrigation network in the Phoenix metropolitan area was the most complex in ancient North America. A portion of the ancient canals has been renovated for the
Salt River Project The Salt River Project (SRP) is the umbrella name for two separate entities: the Salt River Project Agricultural Improvement and Power District, an agency of the state of Arizona that serves as an electrical utility for the Phoenix metropolitan a ...
and now helps to supply the city's water.


Middle Ages

In the Middle Ages, water transport was several times cheaper and faster than transport overland. Overland transport by animal drawn conveyances was used around settled areas, but unimproved roads required pack animal trains, usually of
mule The mule is a domestic equine hybrid between a donkey and a horse. It is the offspring of a male donkey (a jack) and a female horse (a mare). The horse and the donkey are different species, with different numbers of chromosomes; of the two pos ...
s to carry any degree of mass, and while a mule could carry an eighth ton, it also needed teamsters to tend it and one man could only tend perhaps five mules, meaning overland bulk transport was also expensive, as men expect compensation in the form of wages, room and board. This was because long-haul roads were unpaved, more often than not too narrow for carts, much less wagons, and in poor condition, wending their way through forests, marshy or muddy quagmires as often as unimproved but dry footing. In that era, as today, greater cargoes, especially bulk goods and
raw material A raw material, also known as a feedstock, unprocessed material, or primary commodity, is a basic material that is used to produce goods, finished goods, energy, or intermediate materials that are feedstock for future finished products. As feedst ...
s, could be transported by ship far more economically than by land; in the pre-railroad days of the industrial revolution, water transport was the gold standard of fast transportation. The first artificial canal in Western Europe was the Fossa Carolina built at the end of the 8th century under personal supervision of Charlemagne. In Britain, the '' Glastonbury Canal '' is believed to be the first post-Roman canal and was built in the middle of the 10th century to link the River Brue at Northover with Glastonbury Abbey, a distance of about . Its initial purpose is believed to be the transport of building stone for the abbey, but later it was used for delivering produce, including grain, wine and fish, from the abbey's outlying properties. It remained in use until at least the 14th century, but possibly as late as the mid-16th century.
More lasting and of more economic impact were canals like the
Naviglio Grande The Naviglio Grande is a canal in Lombardy, northern Italy, connecting the Ticino river near Tornavento ( south of Sesto Calende) to the Porta Ticinese dock, also known as the ''Darsena'', in Milan. It drops over . It varies in width from from ...
built between 1127 and 1257 to connect Milan with the Ticino River. The Naviglio Grande is the most important of the lombard "
navigli The navigli (; lmo, Navili ) are a system of interconnected canals in and around Milan, in the Italian region of Lombardy, dating back as far as the Middle Ages. The system consists of five canals: Naviglio Grande, Naviglio Pavese, Naviglio Mart ...
" and the oldest functioning canal in Europe.
Later, canals were built in the Netherlands and Flanders to drain the
polder A polder () is a low-lying tract of land that forms an artificial hydrological entity, enclosed by embankments known as dikes. The three types of polder are: # Land reclaimed from a body of water, such as a lake or the seabed # Flood plains s ...
s and assist transportation of goods and people. Canal building was revived in this age because of commercial expansion from the 12th century. River navigations were improved progressively by the use of single, or
flash lock A flash lock is a type of lock for river or canal transport. Early locks were designed with a single gate, known as a flash lock or staunch lock. The earliest European references to what were clearly flash locks were in Roman times. Developme ...
s. Taking boats through these used large amounts of water leading to conflicts with watermill owners and to correct this, the
pound Pound or Pounds may refer to: Units * Pound (currency), a unit of currency * Pound sterling, the official currency of the United Kingdom * Pound (mass), a unit of mass * Pound (force), a unit of force * Rail pound, in rail profile Symbols * Po ...
or chamber lock first appeared, in the 10th century in China and in Europe in 1373 in Vreeswijk, Netherlands. Another important development was the
mitre gate A lock is a device used for raising and lowering boats, ships and other watercraft between stretches of water of different levels on river and canal waterways. The distinguishing feature of a lock is a fixed chamber in which the water lev ...
, which was, it is presumed, introduced in Italy by Bertola da Novate in the 16th century. This allowed wider gates and also removed the height restriction of
guillotine lock A guillotine lock is a type of canal lock. The lock itself operates on the same principle as any normal pound lock, but is unusual in that each gate is a single piece, usually of steel, that slides vertically upwards when opened to allow a boat ...
s. To break out of the limitations caused by river valleys, the first summit level canals were developed with the Grand Canal of China in 581–617 AD whilst in Europe the first, also using single locks, was the Stecknitz Canal in Germany in 1398.


Africa

In the
Songhai Empire The Songhai Empire (also transliterated as Songhay) was a state that dominated the western Sahel/Sudan in the 15th and 16th century. At its peak, it was one of the largest states in African history. The state is known by its historiographical ...
of West Africa, several canals were constructed under
Sunni Ali Sunni Ali, also known as Si Ali, Sunni Ali Ber (Ber meaning "the Great"), was born in Ali Kolon. He reigned from about 1464 to 1492. Sunni Ali was the first king of the Songhai Empire, located in Africa and the 15th ruler of the Sunni dynasty. U ...
and
Askia Muhammad Askia Muhammad (March, 1945 – February 17, 2022) born Charles K. Moreland at Yazoo, Mississippi was an American poet, journalist, radio producer, commentator, and photojournalist. He was awarded multiple times by the National Association of Blac ...
between Kabara and Timbuktu in the 15th century. These were used primarily for irrigation and transport. Sunni Ali also attempted to construct a canal from the Niger River to
Walata , settlement_type = Commune and town , image_skyline = Oualata 03.jpg , imagesize = 300px , image_caption = View of the town looking in a southeasterly direction , image ...
to facilitate conquest of the city but his progress was halted when he went to war with the Mossi Kingdoms.


Early modern period

Around 1500–1800 the first summit level canal to use pound locks in Europe was the
Briare Canal The Briare Canal (french: Canal de Briare, ) is one of the oldest canals in France. Its construction started in 1604. It was the first summit level canal in Europe that was built using pound locks, connecting the Rhone-Saône and Seine valleys. ...
connecting the Loire and
Seine ) , mouth_location = Le Havre/Honfleur , mouth_coordinates = , mouth_elevation = , progression = , river_system = Seine basin , basin_size = , tributaries_left = Yonne, Loing, Eure, Risle , tributarie ...
(1642), followed by the more ambitious
Canal du Midi The Canal du Midi (; ) is a long canal in Southern France (french: le Midi). Originally named the ''Canal royal en Languedoc'' (Royal Canal in Languedoc) and renamed by French revolutionaries to ''Canal du Midi'' in 1789, the canal is considere ...
(1683) connecting the Atlantic to the Mediterranean. This included a staircase of 8 locks at
Béziers Béziers (; oc, Besièrs) is a Subprefectures in France, subprefecture of the Hérault Departments of France, department in the Occitania (administrative region), Occitanie Regions of France, region of Southern France. Every August Béziers hos ...
, a tunnel, and three major aqueducts. Canal building progressed steadily in Germany in the 17th and 18th centuries with three great rivers, the Elbe,
Oder The Oder ( , ; Czech, Lower Sorbian and ; ) is a river in Central Europe. It is Poland's second-longest river in total length and third-longest within its borders after the Vistula and Warta. The Oder rises in the Czech Republic and flows thr ...
and Weser being linked by canals. In post-Roman Britain, the first early modern period canal built appears to have been the Exeter Canal, which was surveyed in 1563, and open in 1566.Exeter history by www.exeter.gov.uk, .pdf fil
Exeter Ship Canal, The First Four Hundred Years
, accessdate=13 September 2013
The oldest canal in the European settlements of North America, technically a mill race built for industrial purposes, is Mother Brook between the Boston, Massachusetts neighbourhoods of Dedham and
Hyde Park Hyde Park may refer to: Places England * Hyde Park, London, a Royal Park in Central London * Hyde Park, Leeds, an inner-city area of north-west Leeds * Hyde Park, Sheffield, district of Sheffield * Hyde Park, in Hyde, Greater Manchester Austra ...
connecting the higher waters of the Charles River and the mouth of the Neponset River and the sea. It was constructed in 1639 to provide water power for mills. In Russia, the Volga–Baltic Waterway, a nationwide canal system connecting the Baltic Sea and Caspian Sea via the
Neva The Neva (russian: Нева́, ) is a river in northwestern Russia flowing from Lake Ladoga through the western part of Leningrad Oblast (historical region of Ingria) to the Neva Bay of the Gulf of Finland. Despite its modest length of , it ...
and Volga rivers, was opened in 1718.


Industrial Revolution

* See also:
History of the British canal system History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...
* See also: History of turnpikes and canals in the United States The modern canal system was mainly a product of the 18th century and early 19th century. It came into being because the Industrial Revolution (which began in Britain during the mid-18th century) demanded an economic and reliable way to transport goods and commodities in large quantities. By the early 18th century, river navigations such as the Aire and Calder Navigation were becoming quite sophisticated, with pound locks and longer and longer "cuts" (some with intermediate locks) to avoid circuitous or difficult stretches of river. Eventually, the experience of building long multi-level cuts with their own locks gave rise to the idea of building a "pure" canal, a waterway designed on the basis of where goods needed to go, not where a river happened to be. The claim for the first pure canal in Great Britain is debated between "Sankey" and "Bridgewater" supporters.Burton, (1995). Chapter 3: ''Building the Canals'' The first true canal in what is now the United Kingdom was the Newry Canal in Northern Ireland constructed by
Thomas Steers Thomas Steers was thought to have been born in 1672 in Kent and died in 1750. He was England's first major civil engineer and built many canals, the world's first commercial wet dock (the Old Dock at Liverpool), St. George's Church at the site o ...
in 1741. The
Sankey Brook Navigation The Sankey Canal in North West England, initially known as the Sankey Brook Navigation and later the St Helens Canal, is a former industrial canal, which when opened in 1757 was England's first of the Industrial revolution, and the first modern ...
, which connected St Helens with the River Mersey, is often claimed as the first modern "purely artificial" canal because although originally a scheme to make the Sankey Brook navigable, it included an entirely new artificial channel that was effectively a canal along the Sankey Brook valley.Rolt, ''Inland Waterways'' However, "Bridgewater" supporters point out that the last quarter-mile of the navigation is indeed a canalized stretch of the Brook, and that it was the Bridgewater Canal (less obviously associated with an existing river) that captured the popular imagination and inspired further canals. In the mid-eighteenth century the 3rd Duke of Bridgewater, who owned a number of coal mines in northern England, wanted a reliable way to transport his coal to the rapidly industrializing city of Manchester. He commissioned the engineer James Brindley to build a canal for that purpose. Brindley's design included an aqueduct carrying the canal over the
River Irwell The River Irwell ( ) is a tributary of the River Mersey in north west England. It rises at Irwell Springs on Deerplay Moor, approximately north of Bacup and flows southwards for to meet the Mersey near Irlam. The Irwell marks the boundary be ...
. This was an engineering wonder which immediately attracted tourists. The construction of this canal was funded entirely by the Duke and was called the Bridgewater Canal. It opened in 1761 and was the first major British canal. The new canals proved highly successful. The boats on the canal were horse-drawn with a towpath alongside the canal for the horse to walk along. This horse-drawn system proved to be highly economical and became standard across the British canal network. Commercial horse-drawn canal boats could be seen on the UK's canals until as late as the 1950s, although by then diesel-powered boats, often towing a second unpowered boat, had become standard. The canal boats could carry thirty tons at a time with only one horse pulling – more than ten times the amount of cargo per horse that was possible with a cart. Because of this huge increase in supply, the Bridgewater canal reduced the price of coal in Manchester by nearly two-thirds within just a year of its opening. The Bridgewater was also a huge financial success, with it earning what had been spent on its construction within just a few years. This success proved the viability of canal transport, and soon industrialists in many other parts of the country wanted canals. After the Bridgewater canal, early canals were built by groups of private individuals with an interest in improving communications. In Staffordshire the famous potter Josiah Wedgwood saw an opportunity to bring bulky cargoes of clay to his factory doors and to transport his fragile finished goods to market in Manchester, Birmingham or further away, by water, minimizing breakages. Within just a few years of the Bridgewater's opening, an embryonic national canal network came into being, with the construction of canals such as the Oxford Canal and the
Trent & Mersey Canal The Trent and Mersey Canal is a canal in Derbyshire, Staffordshire and Cheshire in north-central England. It is a "narrow canal" for the vast majority of its length, but at the extremities to the east of Burton upon Trent and north of Middle ...
. The new canal system was both cause and effect of the rapid industrialization of The Midlands and the north. The period between the 1770s and the 1830s is often referred to as the "Golden Age" of British canals. For each canal, an Act of Parliament was necessary to authorize construction, and as people saw the high incomes achieved from canal tolls, canal proposals came to be put forward by investors interested in profiting from dividends, at least as much as by people whose businesses would profit from cheaper transport of raw materials and finished goods. In a further development, there was often out-and-out speculation, where people would try to buy shares in a newly floated company to sell them on for an immediate profit, regardless of whether the canal was ever profitable, or even built. During this period of " canal mania", huge sums were invested in canal building, and although many schemes came to nothing, the canal system rapidly expanded to nearly 4,000 miles (over 6,400 kilometres) in length. Many rival canal companies were formed and competition was rampant. Perhaps the best example was
Worcester Bar Worcester may refer to: Places United Kingdom * Worcester, England, a city and the county town of Worcestershire in England ** Worcester (UK Parliament constituency), an area represented by a Member of Parliament * Worcester Park, London, Englan ...
in Birmingham, a point where the
Worcester and Birmingham Canal The Worcester and Birmingham Canal is a canal linking Birmingham and Worcester in England. It starts in Worcester, as an 'offshoot' of the River Severn (just after the river lock) and ends in Gas Street Basin in Birmingham. It is long. There ar ...
and the Birmingham Canal Navigations Main Line were only seven feet apart. For many years, a dispute about tolls meant that goods travelling through Birmingham had to be portaged from boats in one canal to boats in the other. Canal companies were initially chartered by individual states in the United States. These early canals were constructed, owned, and operated by private joint-stock companies. Four were completed when the War of 1812 broke out; these were the
South Hadley Canal The South Hadley Canal was a canal along the Connecticut River in South Hadley, Massachusetts. It was the earliest navigable canal in the United States, with operation commencing in 1795. * It has been listed on the National Register of Historic ...
(opened 1795) in Massachusetts,
Santee Canal The Santee Canal was one of the earliest canals built in the United States. It was built to provide a direct water route between Charleston, South Carolina, Charleston and Columbia, South Carolina, Columbia, the new South Carolina state capital. It ...
(opened 1800) in South Carolina, the Middlesex Canal (opened 1802) also in Massachusetts, and the
Dismal Swamp Canal The Dismal Swamp Canal is a canal located along the eastern edge of the Great Dismal Swamp in Virginia and North Carolina in the United States. Opened in 1805, it is the oldest continually operating man-made canal in the United States. It is par ...
(opened 1805) in Virginia. The Erie Canal (opened 1825) was chartered and owned by the state of
New York New York most commonly refers to: * New York City, the most populous city in the United States, located in the state of New York * New York (state), a state in the northeastern United States New York may also refer to: Film and television * '' ...
and financed by bonds bought by private investors. The Erie canal runs about from Albany, New York, on the Hudson River to Buffalo, New York, at Lake Erie. The Hudson River connects Albany to the Atlantic port of New York City and the Erie Canal completed a navigable water route from the Atlantic Ocean to the Great Lakes. The canal contains 36 locks and encompasses a total elevation differential of around 565 ft. (169 m). The Erie Canal with its easy connections to most of the U.S. mid-west and New York City soon quickly paid back all its invested capital (US$7 million) and started turning a profit. By cutting transportation costs in half or more it became a large profit center for Albany and New York City as it allowed the cheap transportation of many of the agricultural products grown in the mid west of the United States to the rest of the world. From New York City these agricultural products could easily be shipped to other U.S. states or overseas. Assured of a market for their farm products the settlement of the U.S. mid-west was greatly accelerated by the Erie Canal. The profits generated by the Erie Canal project started a canal building boom in the United States that lasted until about 1850 when railroads started becoming seriously competitive in price and convenience. The
Blackstone Canal The Blackstone Canal was a waterway linking Worcester, Massachusetts, to Providence, Rhode Island (and Narragansett Bay) through the Blackstone Valley via a series of locks and canals during the early 19th century. History The initiative for th ...
(finished in 1828) in Massachusetts and Rhode Island fulfilled a similar role in the early industrial revolution between 1828 and 1848. The Blackstone Valley was a major contributor of the American Industrial Revolution where Samuel Slater built his first textile mill.


Power canals

* See also:
Power canal A Power canal refers to a canal used for hydraulic power generation, rather than for transport of watercraft. The power canal was a major factor in the Industrial revolution in New England in the 19th century. Most early power canals were mill ...
A power canal refers to a canal used for hydraulic power generation, rather than for transport. Nowadays power canals are built almost exclusively as parts of hydroelectric power stations. Parts of the United States, particularly in the
Northeast The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...
, had enough fast-flowing rivers that water power was the primary means of powering factories (usually textile mills) until after the American Civil War. For example, Lowell, Massachusetts, considered to be "The Cradle of the American Industrial Revolution," has of canals, built from around 1790 to 1850, that provided water power and a means of transportation for the city. The output of the system is estimated at 10,000 horsepower. Other cities with extensive power canal systems include
Lawrence, Massachusetts Lawrence is a city located in Essex County, Massachusetts, United States, on the Merrimack River. At the 2020 census, the city had a population of 89,143. Surrounding communities include Methuen to the north, Andover to the southwest, and Nort ...
,
Holyoke, Massachusetts Holyoke is a city in Hampden County, Massachusetts, United States, that lies between the western bank of the Connecticut River and the Mount Tom Range. As of the 2020 census, the city had a population of 38,238. Located north of Springfield ...
, Manchester, New Hampshire, and Augusta, Georgia. The most notable power canal was built in 1862 for the Niagara Falls Hydraulic Power and Manufacturing Company.


19th century

Competition, from railways from the 1830s and roads in the 20th century, made the smaller canals obsolete for most commercial transport, and many of the British canals fell into decay. Only the
Manchester Ship Canal The Manchester Ship Canal is a inland waterway in the North West of England linking Manchester to the Irish Sea. Starting at the Mersey Estuary at Eastham, near Ellesmere Port, Cheshire, it generally follows the original routes of the river ...
and the
Aire and Calder Canal The Aire and Calder Navigation is the canalised section of the Rivers Aire and Calder in West Yorkshire, England. The first improvements to the rivers above Knottingley were completed in 1704 when the Aire was made navigable to Leeds and the ...
bucked this trend. Yet in other countries canals grew in size as construction techniques improved. During the 19th century in the US, the length of canals grew from to over 4,000, with a complex network making the Great Lakes navigable, in conjunction with Canada, although some canals were later drained and used as railroad
rights-of-way Right of way is the legal right, established by grant from a landowner or long usage (i.e. by prescription), to pass along a specific route through property belonging to another. A similar ''right of access'' also exists on land held by a gov ...
. In the United States, navigable canals reached into isolated areas and brought them in touch with the world beyond. By 1825 the Erie Canal, long with 36 locks, opened up a connection from the populated Northeast to the Great Lakes. Settlers flooded into regions serviced by such canals, since access to markets was available. The Erie Canal (as well as other canals) was instrumental in lowering the differences in commodity prices between these various markets across America. The canals caused price convergence between different regions because of their reduction in transportation costs, which allowed Americans to ship and buy goods from farther distances much cheaper. Ohio built many miles of canal, Indiana had working canals for a few decades, and the Illinois and Michigan Canal connected the Great Lakes to the Mississippi River system until replaced by a channelized river waterway. Three major canals with very different purposes were built in what is now Canada. The first Welland Canal, which opened in 1829 between Lake Ontario and Lake Erie, bypassing Niagara Falls and the Lachine Canal (1825), which allowed ships to skirt the nearly impassable rapids on the St. Lawrence River at Montreal, were built for commerce. The
Rideau Canal The Rideau Canal, also known unofficially as the Rideau Waterway, connects Canada's capital city of Ottawa, Ontario, to Lake Ontario and the Saint Lawrence River at Kingston. It is 202 kilometres long. The name ''Rideau'', French for "curtain", ...
, completed in 1832, connects
Ottawa Ottawa (, ; Canadian French: ) is the capital city of Canada. It is located at the confluence of the Ottawa River and the Rideau River in the southern portion of the province of Ontario. Ottawa borders Gatineau, Quebec, and forms the core ...
on the
Ottawa River The Ottawa River (french: Rivière des Outaouais, Algonquin: ''Kichi-Sìbì/Kitchissippi'') is a river in the Canadian provinces of Ontario and Quebec. It is named after the Algonquin word 'to trade', as it was the major trade route of Eastern ...
to Kingston, Ontario on Lake Ontario. The Rideau Canal was built as a result of the War of 1812 to provide military transportation between the British colonies of Upper Canada and Lower Canada as an alternative to part of the St. Lawrence River, which was susceptible to blockade by the United States. In France, a steady linking of all the river systems – Rhine, Rhône, Saône and Seine – and the North Sea was boosted in 1879 by the establishment of the
Freycinet gauge The Freycinet gauge (french: gabarit Freycinet) is a standard governing the dimensions of the locks of some canals, put in place as a result of a law passed during the tenure of Charles de Freycinet as minister of public works of France, dating fr ...
, which specified the minimum size of locks. Canal traffic doubled in the first decades of the 20th century. Many notable sea canals were completed in this period, starting with the
Suez Canal The Suez Canal ( arz, قَنَاةُ ٱلسُّوَيْسِ, ') is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia. The long canal is a popular ...
(1869) – which carries tonnage many times that of most other canals – and the Kiel Canal (1897), though the Panama Canal was not opened until 1914. In the 19th century, a number of canals were built in Japan including the
Biwako canal is a historic waterway in Japan connecting Lake Biwa to the nearby City of Kyoto. Constructed during the Meiji Period the canal was originally designed for the transportation of lake water for drinking, irrigation and industrial purposes, but ...
and the Tone canal. These canals were partially built with the help of engineers from the Netherlands and other countries. A major question was how to connect the Atlantic and the Pacific with a canal through narrow Central America. (The Panama Railroad opened in 1855.) The original proposal was for a sea-level canal through what is today Nicaragua, taking advantage of the relatively large Lake Nicaragua. This canal has never been built in part because of political instability, which scared off potential investors. It remains an active project (the geography hasn't changed), and in the 2010s Chinese involvement was developing. The second choice for a Central American canal was a Panama canal. The De Lessups company, which ran the
Suez Canal The Suez Canal ( arz, قَنَاةُ ٱلسُّوَيْسِ, ') is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia. The long canal is a popular ...
, first attempted to build a Panama Canal in the 1880s. The difficulty of the terrain and weather (rain) encountered caused the company to go bankrupt. High worker mortality from disease also discouraged further investment in the project. DeLessup's abandoned
excavating equipment Excavation may refer to: * Excavation (archaeology) * Excavation (medicine) * ''Excavation'' (The Haxan Cloak album), 2013 * ''Excavation'' (Ben Monder album), 2000 * ''Excavation'' (novel), a 2000 novel by James Rollins * '' Excavation: A Memo ...
sits, isolated decaying machines, today tourist attractions. Twenty years later, an expansionist United States, that just acquired colonies after defeating Spain in the 1898 Spanish–American War, and whose Navy became more important, decided to reactivate the project. The United States and Colombia did not reach agreement on the terms of a canal treaty (see Hay–Herrán Treaty). Panama, which did not have (and still does not have) a land connection with the rest of Colombia, was already thinking of independence. In 1903 the United States, with support from Panamanians who expected the canal to provide substantial wages, revenues, and markets for local goods and services. transform the country, took Panama province away from Colombia, and set up a puppet republic ( Panama). Its currency, the Balboa – a name that suggests the country began as a way to get from one hemisphere to the other – was a replica of the US dollar. The US dollar was and remains legal tender (used as currency). A U.S. military zone, the Canal Zone, wide, with U.S. military stationed there ( bases, 2 TV stations, channels 8 and 10, Pxs, a U.S.-style high school), split Panama in half. The Canal – a major engineering project – was built. The U.S. did not feel that conditions were stable enough to withdraw until 1979. The withdrawal from Panama contributed to President Jimmy Carter's defeat in 1980.


Modern uses

Large-scale ship canals such as the Panama Canal and Suez Canal continue to operate for cargo transportation, as do European barge canals. Due to globalization, they are becoming increasingly important, resulting in expansion projects such as the
Panama Canal expansion project The Panama Canal expansion project ( es, ampliación del Canal de Panamá), also called the Third Set of Locks Project, doubled the capacity of the Panama Canal by adding a new lane of traffic allowing for a larger number of ships, and increasin ...
. The expanded canal began commercial operation on 26 June 2016. The new set of locks allow transit of larger, Post-Panamax and
New Panamax Panamax and New Panamax (or Neopanamax) are terms for the size limits for ships travelling through the Panama Canal. The limits and requirements are published by the Panama Canal Authority (ACP) in a publication titled "Vessel Requirements". ...
ships. The narrow early industrial canals, however, have ceased to carry significant amounts of trade and many have been abandoned to navigation, but may still be used as a system for transportation of untreated water. In some cases railways have been built along the canal route, an example being the Croydon Canal. A movement that began in Britain and France to use the early industrial canals for pleasure boats, such as hotel barges, has spurred rehabilitation of stretches of historic canals. In some cases, abandoned canals such as the
Kennet and Avon Canal The Kennet and Avon Canal is a waterway in southern England with an overall length of , made up of two lengths of navigable river linked by a canal. The name is used to refer to the entire length of the navigation rather than solely to the cent ...
have been restored and are now used by pleasure boaters. In Britain, canalside housing has also proven popular in recent years. The
Seine–Nord Europe Canal The Seine–Nord Europe Canal is a planned high-capacity (''grand gabarit'') canal in France that would link the Oise River at Compiègne with the Dunkirk-Scheldt Canal, east of Arleux. It is the French part of a proposed Seine-Scheldt canal that ...
is being developed into a major transportation waterway, linking France with Belgium, Germany, and the Netherlands. Canals have found another use in the 21st century, as easements for the installation of
fibre optic An optical fiber, or optical fibre in Commonwealth English, is a flexible, transparent fiber made by drawing glass (silica) or plastic to a diameter slightly thicker than that of a human hair. Optical fibers are used most often as a means to ...
telecommunications network cabling, avoiding having them buried in roadways while facilitating access and reducing the hazard of being damaged from digging equipment. Canals are still used to provide water for agriculture. An extensive canal system exists within the Imperial Valley in the Southern California desert to provide irrigation to agriculture within the area.


Cities on water

Canals are so deeply identified with
Venice Venice ( ; it, Venezia ; vec, Venesia or ) is a city in northeastern Italy and the capital of the Veneto Regions of Italy, region. It is built on a group of 118 small islands that are separated by canals and linked by over 400  ...
that many canal cities have been nicknamed ''"the Venice of…"''. The city is built on marshy islands, with wooden piles supporting the buildings, so that the land is man-made rather than the waterways. The islands have a long history of settlement; by the 12th century, Venice was a powerful city state. Amsterdam was built in a similar way, with buildings on wooden piles. It became a city around 1300. Many Amsterdam canals were built as part of fortifications. They became ''
gracht ''Gracht'' (; plural: ''grachten'') is a Dutch word for a canal within a city. ''Grachten'' often have a round shape, and form a circle around the city cores in the Netherlands, Belgium, and northern Germany. Outside the Netherlands, the word '' ...
en'' when the city was enlarged and houses were built alongside the water. Its nickname as the "Venice of the North" is shared with Hamburg of Germany, St. Petersburg of Russia and Bruges of Belgium.
Suzhou Suzhou (; ; Suzhounese: ''sou¹ tseu¹'' , Mandarin: ), alternately romanized as Soochow, is a major city in southern Jiangsu province, East China. Suzhou is the largest city in Jiangsu, and a major economic center and focal point of trade ...
was dubbed the "Venice of the East" by Marco Polo during his travels there in the 13th century, with its modern canalside
Pingjiang Road Pingjiang Road (), historically known as Shiquan Li (Chinese:十泉里), is a street and historic district in Gusu District (formerly the Pingjiang District), northeastern Suzhou, Jiangsu, China. It is a well-preserved area and is part of the so ...
and Shantang Street becoming major tourist attractions. Other nearby cities including Nanjing, Shanghai, Wuxi, Jiaxing,
Huzhou Huzhou (, ; Huzhounese: ''ghou² cieu¹'') is a prefecture-level city in northern Zhejiang province (Hangzhou–Jiaxing–Huzhou Plain, China). Lying south of the Lake Tai, it borders Jiaxing to the east, Hangzhou to the south, and the provinc ...
, Nantong, Taizhou, Yangzhou, and Changzhou are located along the lower mouth of the Yangtze River and Lake Tai, yet another source of small rivers and creeks, which have been canalized and developed for centuries. Other cities with extensive canal networks include:
Alkmaar Alkmaar () is a city and municipality in the Netherlands, located in the province of North Holland, about 30 km north of Amsterdam. Alkmaar is well known for its traditional cheese market. For tourists, it is a popular cultural destination. The ...
, Amersfoort, Bolsward, Brielle,
Delft Delft () is a List of cities in the Netherlands by province, city and Municipalities of the Netherlands, municipality in the Provinces of the Netherlands, province of South Holland, Netherlands. It is located between Rotterdam, to the southeast, ...
, Den Bosch, Dokkum, Dordrecht,
Enkhuizen Enkhuizen () is a municipality and a city in the Netherlands, in the province of North Holland and the region of West-Frisia. History Enkhuizen, like Hoorn and Amsterdam, was one of the harbor-towns of the VOC, from where overseas trade wi ...
, Franeker,
Gouda Gouda may refer to: * Gouda, South Holland, a city in the Netherlands ** Gouda (pottery), style of pottery manufactured in Gouda ** Gouda cheese, type of cheese originally made in and around Gouda ** Gouda railway station * Gouda, Western Cape, a s ...
,
Haarlem Haarlem (; predecessor of ''Harlem'' in English) is a city and municipality in the Netherlands. It is the capital of the province of North Holland. Haarlem is situated at the northern edge of the Randstad, one of the most populated metropoli ...
, Harlingen, Leeuwarden, Leiden, Sneek and Utrecht in the Netherlands; Brugge and Gent in Flanders, Belgium; Birmingham in England; Saint Petersburg in Russia;
Bydgoszcz Bydgoszcz ( , , ; german: Bromberg) is a city in northern Poland, straddling the meeting of the River Vistula with its left-bank tributary, the Brda. With a city population of 339,053 as of December 2021 and an urban agglomeration with more ...
,
Gdańsk Gdańsk ( , also ; ; csb, Gduńsk;Stefan Ramułt, ''Słownik języka pomorskiego, czyli kaszubskiego'', Kraków 1893, Gdańsk 2003, ISBN 83-87408-64-6. , Johann Georg Theodor Grässe, ''Orbis latinus oder Verzeichniss der lateinischen Benen ...
,
Szczecin Szczecin (, , german: Stettin ; sv, Stettin ; Latin: ''Sedinum'' or ''Stetinum'') is the capital and largest city of the West Pomeranian Voivodeship in northwestern Poland. Located near the Baltic Sea and the German border, it is a major s ...
and Wrocław in Poland; Aveiro in Portugal; Hamburg and Berlin in Germany; Fort Lauderdale and Cape Coral in Florida, United States, Wenzhou in China, Cần Thơ in Vietnam, Bangkok in Thailand, and Lahore in Pakistan. Liverpool Maritime Mercantile City was a UNESCO World Heritage Site near the centre of Liverpool, England, where a system of intertwining waterways and docks is now being developed for mainly residential and leisure use.
Canal estate A canal estate, canal development, waterway estate or marine suburb is a residential subdivision made up of canals and reclaimed land, such that many or all of the lots can incorporate a private mooring or boat ramp. Canal estates are typically c ...
s (sometimes known as bayous in the United States) are a form of
subdivision Subdivision may refer to: Arts and entertainment * Subdivision (metre), in music * ''Subdivision'' (film), 2009 * "Subdivision", an episode of ''Prison Break'' (season 2) * ''Subdivisions'' (EP), by Sinch, 2005 * "Subdivisions" (song), by Rus ...
popular in cities like Miami, Florida, Texas City, Texas and the
Gold Coast, Queensland The Gold Coast is a coastal city in the state of Queensland, Australia, approximately south-southeast of the centre of the state capital Brisbane. With a population over 600,000, the Gold Coast is the sixth-largest city in Australia, the nati ...
; the Gold Coast has over 890 km of residential canals.
Wetlands A wetland is a distinct ecosystem that is flooded or saturated by water, either permanently (for years or decades) or seasonally (for weeks or months). Flooding results in oxygen-free (anoxic) processes prevailing, especially in the soils. The ...
are difficult areas upon which to build housing estates, so
dredging Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing da ...
part of the wetland down to a navigable channel provides fill to build up another part of the wetland above the flood level for houses. Land is built up in a finger pattern that provides a suburban street layout of waterfront housing blocks.


Boats

Inland canals have often had boats specifically built for them. An example of this is the British
narrowboat A narrowboat is a particular type of canal boat, built to fit the narrow locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution, but with the advent of the railways, commerc ...
, which is up to long and wide and was primarily built for British Midland canals. In this case the limiting factor was the size of the locks. This is also the limiting factor on the Panama canal where
Panamax Panamax and New Panamax (or Neopanamax) are terms for the size limits for ships travelling through the Panama Canal. The limits and requirements are published by the Panama Canal Authority (ACP) in a publication titled "Vessel Requirements". ...
ships were limited to a length of and a beam of until 26 June 2016 when the opening of larger locks allowed for the passage of larger New Panamax ships. For the lockless Suez Canal the limiting factor for
Suezmax "Suezmax" is a naval architecture term for the largest ship measurements capable of transiting the Suez Canal in a laden condition, and is almost exclusively used in reference to tankers. The limiting factors are beam, draft, height (because ...
ships is generally draft, which is limited to . At the other end of the scale, tub-boat canals such as the Bude Canal were limited to boats of under 10 tons for much of their length due to the capacity of their inclined planes or boat lifts. Most canals have a limit on height imposed either by bridges or by tunnels.


Lists of canals

*Africa ** Bahr Yussef **
El Salam Canal El Salam Canal ( ar, ترعة السلام) is a canal built as a part of the Sinai Project. It starts at the Damietta branch of the Nile and stretches southwest towards Lake Manzala Lake Manzala ( ar, بحيرة المنزلة ''baḥīrat ma ...
Egypt **
Ibrahimiya Canal The Ibrahimiyah Canal is an irrigation canal in Egypt built in 1873. It was the most important public work executed under the then newly established Ministry of Public Works. It was built during the reign of Ismail Pasha when he was Khedive of ...
Egypt **
Mahmoudiyah Canal Mahmoudia Canal ( ''Agathos Daimon'' or ''Megas potamos'') is a sub-canal from the Nile River which starts at the Nile-port of Mahmoudia and goes through Alexandria to the Mediterranean Sea. It was built to supply Alexandria with food and fresh ...
Egypt **
Suez Canal The Suez Canal ( arz, قَنَاةُ ٱلسُّوَيْسِ, ') is an artificial sea-level waterway in Egypt, connecting the Mediterranean Sea to the Red Sea through the Isthmus of Suez and dividing Africa and Asia. The long canal is a popular ...
Egypt *Asia ** see
List of canals in India This is a list of canals in India. * Agra canal * Sethusamudram Shipping Canal Project * Buckingham Canal * Handri-Neeva * K. C. Canal * Conolly Canal * Munak canal * Western Yamuna Canal * Eastern Yamuna Canal * Kutte Kol * Nallah Mar * T ...
** see
List of canals in Pakistan Pakistan has one of the largest man-made canal systems in the world providing irrigation facilities to 48 million acres. Canal network of Pakistan consists of Main Canals, Branch Canals, Link Canals, Major distributaries, Minor distributaries, and ...
** see History of canals in China * Europe **
Danube–Black Sea Canal The Danube–Black Sea Canal ( ro, Canalul Dunăre–Marea Neagră) is a navigable canal in Romania, which runs from Cernavodă on the Danube river, via two branches, to Constanța and Năvodari on the Black Sea. Administered from Agigea, it ...
( Romania) ** North Crimean Canal ( Ukraine) ** Canals of France **
Canals of Amsterdam Amsterdam, capital of the Netherlands, has more than of '' grachten'' (canals), about 90 islands and 1,500 bridges. The three main canals (Herengracht, Prinsengracht and Keizersgracht), dug in the 17th century during the Dutch Golden Age, form c ...
** Canals of Germany **
Canals of Ireland :''This article covers the whole of Ireland, that is, covering both the Republic of Ireland and Northern Ireland'' Navigable canals * Ardnacrusha Canal * Grand Canal *Jamestown Canal *Lecarrow Canal *Newry Ship Canal *Royal Canal *Shannon–Ern ...
** Canals of Russia ** Canals of the United Kingdom **
Great Bačka Canal Great Bačka Canal ( Serbian: /; hu, Ferenc-csatorna) is a canal in Serbia which runs from Bezdan (on the Danube) to Bečej (on the Tisa). The canal is long and part of the Danube-Tisa-Danube Canal system. The excavation works of Great Bač ...
( Serbia) * North America **
Canals of Canada There exists a number of canals in Canada that are used as aqueducts, diversionary channels for power stations, and for shippings. Natural canals A natural canal exists between the Magaguadavic River and Lake Utopia outside St. George, New Bru ...
** Canals of the United States


Lists of proposed canals

* Eurasia Canal *
Istanbul Canal The Istanbul Canal ( tr, Kanal İstanbul) is a project for an artificial sea-level waterway, which is planned by Turkey on East Thrace, connecting the Black Sea to the Sea of Marmara, and thus to the Aegean and Mediterranean seas. Istanbul Cana ...
* Nicaragua Canal *
Salwa Canal The Salwa Canal was a proposed shipping route and tourism project through Saudi Arabia along its border with Qatar, effectively turning the latter into an island. The project appears to be abandoned for the present. Background In June 2017, S ...
* Thai Canal *
Two Seas Canal 2 (two) is a number, numeral and digit. It is the natural number following 1 and preceding 3. It is the smallest and only even prime number. Because it forms the basis of a duality, it has religious and spiritual significance in many culture ...
*
Northern river reversal The Northern river reversal or Siberian river reversal was an ambitious project to divert the flow of the Northern rivers in the Soviet Union, which "uselessly" drain into the Arctic Ocean, southwards towards the populated agricultural areas of C ...
* Balkan Canal or Danube–Morava–Vardar–Aegean Canal *
Iranrud Iranrud (Persian: ایران‌رود) which means ''Iran River'' in Persian, was a plan to build a canal from the Caspian Sea to the Persian Gulf or the Gulf of Oman. The former Soviet Union was eager to realize this project because its only warm ...


See also

* Barges of all types *
Beaver Beavers are large, semiaquatic rodents in the genus ''Castor'' native to the temperate Northern Hemisphere. There are two extant species: the North American beaver (''Castor canadensis'') and the Eurasian beaver (''C. fiber''). Beavers ar ...
, a non-human animal also known for canal building * Canal elevator * Canal & River Trust *
Canal tunnel {{Refimprove, date=September 2009 A canal tunnel is a tunnel for a canal. The building of a canal tunnel is crucial to help a waterway that is normally used for shipping cross a difficult section of terrain. They are also constructed to reduce th ...
*
Channel Channel, channels, channeling, etc., may refer to: Geography * Channel (geography), in physical geography, a landform consisting of the outline (banks) of the path of a narrow body of water. Australia * Channel Country, region of outback Austral ...
* Ditch *
Environment Agency The Environment Agency (EA) is a non-departmental public body, established in 1996 and sponsored by the United Kingdom government's Department for Environment, Food and Rural Affairs, with responsibilities relating to the protection and enha ...
*
History of the British canal system History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...
* Horse-drawn boat *
Infrastructure Infrastructure is the set of facilities and systems that serve a country, city, or other area, and encompasses the services and facilities necessary for its economy, households and firms to function. Infrastructure is composed of public and priv ...
* Irrigation district *
Lists of canals This article is a collection of lists of natural (rivers, estuaries, and straits) and artificial (reservoirs, canals and locks) waterways. Waterways lists Natural waterways * List of estuaries in England * List of straits in the United ...
* List of navigation authorities in the United Kingdom * List of waterways *
List of waterway societies in the United Kingdom This List of waterway societies in the United Kingdom is a list of links to waterway societies, charities, trusts, associations, clubs and other non-governmental waterway organisations, concerned with the restoration, regeneration and use of t ...
* Lock * Mooring * Navigable aqueduct * Navigation authority *
Narrowboat A narrowboat is a particular type of canal boat, built to fit the narrow locks of the United Kingdom. The UK's canal system provided a nationwide transport network during the Industrial Revolution, but with the advent of the railways, commerc ...
*
Power canal A Power canal refers to a canal used for hydraulic power generation, rather than for transport of watercraft. The power canal was a major factor in the Industrial revolution in New England in the 19th century. Most early power canals were mill ...
*
Proposed canals Proposal(s) or The Proposal may refer to: * Proposal (business) * Research proposal * Proposal (marriage) * Proposition, a proposal in logic and philosophy Arts, entertainment, and media * ''The Proposal'' (album) Films * ''The Proposal' ...
* River * Ship canal * Tow path * Roman canals – ('' Torksey'') *
Volumetric flow rate In physics and engineering, in particular fluid dynamics, the volumetric flow rate (also known as volume flow rate, or volume velocity) is the volume of fluid which passes per unit time; usually it is represented by the symbol (sometimes ). I ...
*
Water bridge Navigable aqueducts (sometimes called water bridges) are bridge structures that carry navigable waterway canals over other rivers, valleys, railways or roads. They are primarily distinguished by their size, carrying a larger cross-section of wa ...
* Waterscape *
Water transportation Water transportation is the international movement of water over large distances. Methods of transportation fall into three categories: * Aqueducts, which include pipelines, canals, tunnels and bridges * Container shipment, which includes trans ...
* Waterway *
Waterway restoration Waterway restoration is the activity of restoring a canal or river, including special features such as warehouse buildings, locks, boat lifts, and boats. In the United Kingdom, Canada and the United States, the focus of waterway restoration is o ...
* Waterways in the United Kingdom * Weigh lock


References


Notes


Bibliography

* * * * * *


External links


British Waterways' leisure website – Britain's official guide to canals, rivers and lakes

Leeds Liverpool Canal Photographic Guide



Information and Boater's Guide to the New York State Canal System


* ttp://www.canals.org/ National Canal Museum (USA)
London Canal Museum (UK)

Canals in Amsterdam

Canal du Midi

Canal des Deux Mers


* {{Authority control Coastal construction Water transport infrastructure Artificial bodies of water Infrastructure