A sluice ( // SLOOS) is a water channel controlled at its head by a gate. A mill race, leet, flume, penstock or lade is a sluice channelling water toward a water mill. The terms sluice, sluice gate, knife gate, and slide gate are used interchangeably in the water and wastewater control industry.
A sluice gate is traditionally a wood or metal barrier sliding in grooves that are set in the sides of the waterway. Sluice gates commonly control water levels and flow rates in rivers and canals. They are also used in wastewater treatment plants and to recover minerals in mining operations, and in watermills.
"Sluice gate" refers to a movable gate allowing water to flow under it. When a sluice is lowered, water may spill over the top, in which case the gate operates as a weir. Usually, a mechanism drives the sluice up or down. This may be a simple, hand-operated, chain pulled/lowered, worm drive or rack-and-pinion drive, or it may be electrically or hydraulically powered.
In the mountains of the United States, sluices transported logs from steep hillsides to downslope sawmill ponds or yarding areas. Nineteenth-century logging was traditionally a winter activity for men who spent summers working on farms. Where there were freezing nights, water might be applied to logging sluices every night so a fresh coating of slippery ice would reduce friction of logs placed in the sluice the following morning.
Sluice boxes are often used in the recovery of black sands, gold, and other minerals from placer deposits during placer mining operations. They may be small-scale, as used in prospecting, or much larger, as in commercial operations, where the material is first screened using a trommel or screening plant. Typical sluices have transverse riffles over a carpet, which trap the heavy minerals, gemstones, and other valuable minerals. The result is a concentrate.
In the Somerset Levels, sluice gates are known as clyseor clyce.
Most of the inhabitants of Guyana refer to sluices as kokers.[ citation needed ]
Sinhala people in Sri Lanka who had an ancient civilization based on harvested rain water, refer to sluices as Horovuwa.
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.
Hellevoetsluis is a small city and municipality in the western Netherlands. It is located in Voorne-Putten, South Holland. The municipality covers an area of 61.20 km2 (23.63 sq mi) of which 20.10 km2 (7.76 sq mi) is water and it includes the population centres Nieuw-Helvoet, Nieuwenhoorn, and Oude en Nieuwe Struiten, all former municipalities.
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 Oosterscheldekering, between the islands Schouwen-Duiveland and Noord-Beveland, is the largest of the thirteen ambitious Delta Works series of dams and storm surge barriers, designed to protect the Netherlands from flooding from the North Sea. The construction of the Delta Works was a response to the widespread damage and loss of life in the North Sea flood of 1953.
King's Sedgemoor Drain is an artificial drainage channel which diverts the River Cary in Somerset, England along the southern flank of the Polden Hills, to discharge into the River Parrett at Dunball near Bridgwater. As the name suggests, the channel is used to help drain the peat moors of King's Sedgemoor. There was opposition to drainage schemes from the local inhabitants, who feared that they would lose their common grazing rights. However, the main channel was constructed between 1791 and 1795, and despite some defects, brought some relief from flooding to the area.
The caisson lock is a type of canal lock in which a narrowboat is floated into a sealed watertight box and raised or lowered between two different canal water levels. It was invented in the late 18th century as a solution to the problem posed by the excessive demand for water when conventional locks were used to raise and lower canal boats through large height differences. Such locks, each of which would only raise and lower boats through small height differences of a few feet, would not suffice when large height differences had to be tackled nor when water was in short supply. The caisson was thought to be one solution, although it transpired that the technology of the day was not capable of achieving this type of construction economically.
The Noordhollandsch Kanaal is a canal originally meant for ocean-going ships. It is located in North Holland, Netherlands. The canal was of great significance in Dutch history.
Corneli(u)s Rudolphus Theodorus, Baron Krayenhoff was a physicist, artist, general, hydraulic engineer, cartographer and – against his will and for only a short time – Dutch Minister of War.
The Hoogheemraadschap van Rijnland is the oldest water board of the Netherlands, having received its first commission to protect the land from flooding back in 1248 from William II of Holland. It conducts water control activities in the general area known as Rijnland. The Netherlands has 21 Waterboards or Waterschappen acting independently from the National government administration to manage the continuing Dutch struggle against water.
The Mechelen-Zuid water tower is a 143-metre-high (469 ft), combined water and telecommunications tower constructed in 1978. Since 1979, it has supplied the water to the city of Mechelen, Belgium, while also hosting television and telecommunications aerials. The concrete spire passes through a wide disc holding water fifty metres above the ground. Higher up, a smaller disc supports telecommunications equipment. Topped by a decorative stainless steel tube, it is claimed to be the highest water tower in the world.
Two Watermills and an Open Sluice near Singraven is an oil on canvas painting by the Dutch landscape painter Jacob van Ruisdael. It is an example of Dutch Golden Age painting and is now in the collection of the National Gallery.
The Marneslenk (Dutch), or Marneslinke (Frisian), or Marne estuary, was a former estuary in western Friesland south of Harlingen, now reclaimed to be farmland. It formed around the year 300 AD, when rising sea levels also enlarged the Almere lake to the southwest, and formed the Middelzee to the east. The Marneslenk had its mouth on the Vlie and stretched southeasterly to the area of Tirns and then headed east to the Middelzee. Between 1100 and 1300 AD the watercourse was reclaimed and turned into fields by the construction of dykes. One such dyke is the Pingjumer Gulden Halsband. The Bedelaarsvaart (Bidlersfeart) and Harnzerfeartis are what remains of this watercourse nowadays.
The siege of Oldenzaal took place in the Spanish held town of Oldenzaal in the Twente region from July 23 to August 1, 1626 during the Eighty Years' War and the Anglo–Spanish War. After an eight-day siege led by Ernest Casimir the city surrendered.
Sluis 0 is a lock in the Zuid-Willemsvaart, in 's-Hertogenbosch, Netherlands. It is a large lock that will be made much smaller in the 2020s.
The Drongelens Canal is a drainage canal that runs from 's-Hertogenbosch to Drongelen in North Brabant. The colloquial Dutch name, and the name used on street signs is Drongelens Kanaal. The official Dutch name is Afwateringskanaal van 's-Hertogenbosch naar Drongelen.
Hellevoetsluis Dry Dock is a historic double dry dock in Hellevoetsluis, Netherlands. It was constructed between 1798 and 1822 under the direction of Jan Blanken, and was part of the former Rijkswerf Hellevoetsluis. The dock is one of the rare surviving double dry docks. It is a national monument, and is in operation as part of the maritime attraction 'Dry Dock Jan Blanken',.
Willemsoord Dry Dock I is a historic dry dock in Willemsoord, Den Helder, Netherlands. It was constructed from 1813 till 1822, under the direction of Jan Blanken, and was part of the former Rijkswerf Willemsoord.
Willem I Lock is a monumental lock in Amsterdam-Noord.
Koopvaarders Lock in Den Helder, Netherlands connects the Noordhollandsch Kanaal to the Nieuwediep. There were 4 locks at Nieuwediep carrying this name.
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