Delfzijl is a city and former municipality with a population of 25,651 in the province of Groningen in the northeast of the Netherlands. Delfzijl was a sluice between the Delf and the Ems, which became fortified settlement in the 16th century. The fortifications were removed in the late 19th century. Delfzijl is the fifth largest seaport in the Netherlands, and the largest port in the North East of the country.
The River Great Ouse is a river in England, the longest of several British rivers called "Ouse". From Syresham in Northamptonshire, the Great Ouse flows through Buckinghamshire, Bedfordshire, Cambridgeshire and Norfolk to drain into the Wash and the North Sea near Kings Lynn. Authorities disagree both on the river's source and its length, with one quoting 160 mi (260 km) and another 143 mi (230 km). Mostly flowing north and east, it is the fifth longest river in the United Kingdom. The Great Ouse has been historically important for commercial navigation, and for draining the low-lying region through which it flows; its best-known tributary is the Cam, which runs through Cambridge. Its lower course passes through drained wetlands and fens and has been extensively modified, or channelised, to relieve flooding and provide a better route for barge traffic. The unmodified river would have changed course regularly after floods.
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 level can be varied; whereas in a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself that rises and falls.
The Canal du Midi is a 240 km (150 mi) long canal in Southern France. Originally named the Canal Royal en Languedoc and renamed by French revolutionaries to Canal du Midi in 1789, the canal is considered one of the greatest construction works of the 17th century.
The River Brede is an English river in East Sussex. It flows into the Rock Channel and then onto the River Rother at Rye, Sussex. It takes its name from the village of Brede, which lies between Hastings and Tenterden.
The River Rother flows for 35 miles (56 km) through the English counties of East Sussex and Kent. Its source is near Rotherfield in East Sussex, and its mouth is on Rye Bay, part of the English Channel. Prior to 1287, its mouth was further to the east at New Romney, but it changed its course after a great storm blocked its exit to the sea. It was known as the Limen until the sixteenth century. For the final 14 miles (23 km), the river bed is below the high tide level, and Scots Float Sluice is used to control levels. It prevents salt water entering the river system at high tides, and retains water in the river during the summer months to ensure the health of the surrounding marsh habitat. Below the sluice, the river is tidal for 3.7 miles (6.0 km).
The Louth Navigation was a canalisation of the River Lud. It ran for 11 miles (18 km) from Louth in Lincolnshire, England, to Tetney Haven, at the mouth of the Humber. It was authorised by act of Parliament in 1763 and completed in 1770, under the supervision of the engineer John Grundy Jr. and then by James Hoggard. Eight locks were required to overcome the difference in altitude, six of which were constructed with sides consisting of four bays.
Navigable aqueducts 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 water than most water-supply aqueducts. Roman aqueducts were used to transport water and were created in Ancient Rome. The 662-metre (2,172 ft) long steel Briare aqueduct carrying the Canal latéral à la Loire over the River Loire was built in 1896. It was ranked as the longest navigable aqueduct in the world for more than a century, until the Magdeburg Water Bridge in Germany took the title in the early 21st century.
Siphon tubes are a basic implement used in irrigation to transfer water over a barrier, using the siphon principle.
The Canal de Garonne, formerly known as Canal latéral à la Garonne, is a French canal dating from the mid-19th century that connects Toulouse to Castets-en-Dorthe. The remainder of the route to Bordeaux uses the river Garonne. It is the continuation of the Canal du Midi which connects the Mediterranean with Toulouse.
The Briare Aqueduct in central France carries the Canal latéral à la Loire over the river Loire on its journey to the Seine. It replaced a river-level crossing from the canal to meet the Briare Canal that was hazardous in times of flood. Between 1896 and 2003 it was the longest navigable aqueduct in the world, until the opening of the Magdeburg Water Bridge.
The covering of the Senne was the covering and later diverting of the main river of Brussels, Belgium, and the construction of public buildings and major boulevards in its place. Carried out between 1867 and 1871, it is one of the defining events in the history of Brussels.
Capestang is a commune in the Hérault department in southern France.
Three Mills Wall River Weir is a weir on the Bow Back Rivers, in Mill Meads in the London Borough of Newham, England, near to Three Mills. It was built in 2009, when the Bow Back Rivers were refurbished to make them a key feature of the Queen Elizabeth Olympic Park, and maintains water levels through much of the park in conjunction with the Three Mills Lock and sluice on the Prescott Channel.
There are 91 working locks on the Canal du Midi along its 240-kilometre (150 mi) course from the Bassin du Thau on the Mediterranean coast to the junction with the Canal lateral a la Garonne in Toulouse. There are a further 13 locks on the 37-kilometre (23 mi) La Nouvelle branch which runs through Narbonne to the Mediterranean at Port-la-Nouvelle. The locks are all under the management of the French navigation authority, Voies navigables de France.
Ouvrages du Libron is a structure like no other on the Canal du Midi. It allows the Libron River, near Agde in south-west France, to traverse the Canal du Midi. At the point of intersection, the Libron is more or less at the same level as the Canal du Midi so a traditional aqueduct was not an option. The problem was further exacerbated by the Libron's propensity to flash flood up to twenty times a year. The problem was originally solved by the building of a pontoon aqueduct known as the Libron Raft which utilised a flush-decked barge to protect the canal channel in times of flooding. However, this was replaced by the present structure in 1855.
Nahal Amud, also known as the Wadi al-Amud, is a stream in the Upper Galilee region of Israel that flows into the Sea of Galilee.
The North Jiangsu Main Irrigation Canal is located in the lower reaches of the Huai River, one of the major rivers in the north of Jiangsu Province, China. It originates at Gaoliangjian on Hongze Lake and runs through Hongze, Qingpu, Huai'an, Funing, Sheyang and Binghai county(or district) and joins the artificial estuary of Biandan Harbour. The canal is 168 km in length and can irrigate 1,720,000 hectares of farmland. The construction program was organized and directed by the headquarters of the Jiangsu Huai River management program between October 1951 and May 1952.
The Oranje Locks are a group of locks and other water management facilities just east of Amsterdam.
The Haute Perche Canal, despite its title, is a natural river, the Rivière de Haute-Perche, that has been slightly canalised to improve navigation between its mouth in the Bay of Bourgneuf at the port town of Pornic and the upstream settlements of Le Clion-sur-Mer, Chauvé and Arthon-en-Retz. It is located in the Pays de Retz in the Loire-Atlantique department and the Pays de la Loire region. It has also been known as the Canal de Pornic since the 16th century and was sometimes called the Étier de Haute Perche. Historically, it was called the Rouet, after the wheels of the water mills in the port.
