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Tilting Weir
A tilting weir or tilting gate is a movable weir that is used for raising and lowering a Hydraulic head, head of water by controlling the flow of water to a lower catchment area or drainage basin. Typically the plate or paddle of the tilting weir moves up and down in a narrow duct by titling, pivoting, or rotating on its bottom horizontal axis, which opens or closes the tilting weir, thus controlling the flow of water out of the higher drainage basin. Construction There are beamed tilting weirs and beamless tilting weirs. Beamed tilting weirs have a strut, bar, or beam across the top of the tilting weir. Beamless tilting weirs are used where the watercourse could be subject to a significant volume of debris. Small boats and canoes are able to cross a beamless weir. Tilting weirs are manufactured from Galvanization, galvanized Carbon steel#Mild steel, mild steel, painted Carbon steel#Mild steel, mild steel, stainless steel, or High-density polyethylene, HDPE, and are set in Channe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilting Weir, Louth Canal
Tilting may refer to: * Tilt (camera), a cinematographic technique * Tilting at windmills, an English idiom * Tilting theory, an algebra theory * Exponential tilting, a probability distribution shifting technique * Tilting three-wheeler, a vehicle which leans when cornering while keeping all of its three wheels on the ground * Tilting train, a train with a mechanism enabling increased speed on regular railroad tracks * Tilting, Newfoundland and Labrador, a town on Fogo Island, Canada * Tilting, a synonym for jousting {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh
In ecology, a marsh is a wetland that is dominated by herbaceous plants rather than by woody plants.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p More in general, the word can be used for any low-lying and seasonally waterlogged terrain. In Europe and in agricultural literature low-lying meadows that require draining and embanked polderlands are also referred to as marshes or marshland. Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat. Marshes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrought Iron
Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%), or 0.25 for low carbon "mild" steel. Wrought iron is manufactured by heating and melting high carbon cast iron in an open charcoal or coke hearth or furnace in a process known as puddling. The high temperatures cause the excess carbon to oxidise, the iron being stirred or puddled during the process in order to achieve this. As the carbon content reduces, the melting point of the iron increases, ultimately to a level which is higher than can be achieved by the hearth, hence the wrought iron is never fully molten and many impurities remain. The primary advantage of wrought iron over cast iron is its malleability - where cast iron is too brittle to bend or shape without breaking, wrought iron is highly malleable, and much easier to bend. Wrought iron is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marne (river)
The Marne (; ) is a river in France, an eastern tributary of the Seine in the area east and southeast of Paris. It is long. The river gave its name to the departments of France, departments of Haute-Marne, Marne (department), Marne, Seine-et-Marne, and Val-de-Marne. The Marne starts in the Langres plateau, runs generally north then bends west between Saint-Dizier and Châlons-en-Champagne, joining the Seine at Charenton-le-Pont, Charenton just upstream from Paris. Its main tributaries are the Rognon (Marne), Rognon, the Blaise (Marne), Blaise, the Saulx (river), Saulx, the Ourcq, the Petit Morin and the Grand Morin. Near the town of Saint-Dizier, part of the flow is diverted through the artificial Lake Der-Chantecoq. This ensures both flood prevention and the maintenance of minimum river flows in periods of drought. The Marne is famous as the site of two eponymous battles during World War I. The First Battle of the Marne, first battle was a turning point of the war, fought in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Generator
In electricity generation, a generator, also called an ''electric generator'', ''electrical generator'', and ''electromagnetic generator'' is an electromechanical device that converts mechanical energy to electrical energy for use in an external circuit. In most generators which are rotating machines, a source of kinetic power rotates the generator's shaft, and the generator produces an electric current at its output terminals which flows through an external circuit, powering electrical loads. Sources of mechanical energy used to drive generators include steam turbines, gas turbines, water turbines, internal combustion engines, wind turbines and even hand cranks. Generators produce nearly all of the electric power for worldwide electric power grids. The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday. The reverse conversion of electrical energy into mechanical energy is done by an electric motor, and motors and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lanark Hydro Electric Scheme
The Lanark Hydro Electric Scheme consists of two hydroelectric plants in the Clydesdale (district), Clydesdale area of South Lanarkshire, Scotland. They are run-of-the-river power stations, using water from the River Clyde near to the Falls of Clyde (waterfalls), Falls of Clyde. Bonnington Power Station gets its water supply from just above Corra Linn in New Lanark, while Stonebyres Power Station takes water from above Stonebyres Linn near Kirkfieldbank. Bonnington is the larger of the two stations, which between them can produce 17 MW. The Lanark Hydro Electric Scheme was the first large-scale scheme in the United Kingdom to produce clean renewable energy for public supply, using water from the Falls of Clyde to power homes and meet the growing demand for electricity after World War I. The scheme does not use dams for water storage, relying instead on there being sufficient water in the river and flowing down the waterfalls to enable the power stations to operate for most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Aire
The River Aire is a major river in Yorkshire, England, in length. Part of the river below Leeds is canalised, and is known as the Aire and Calder Navigation. The ''Handbook for Leeds and Airedale'' (1890) notes that the distance from Malham to Howden is direct, but the river's meanderings extend that to . Between Malham Tarn and Airmyn, the river drops . Course The Aire starts at Malham Tarn and becomes a subterranean stream at 'Water Sinks' about one mile (1.6 km) before the top of Malham Cove, it then flows underground to Aire Head, just below Malham, in North Yorkshire, and then flows through Gargrave and Skipton. After Cononley, the river enters West Yorkshire where it passes through the former industrial areas of Keighley, Bingley, Saltaire and Shipley. It then passes through Leeds and on to Swillington and Woodlesford. At Castleford is the confluence of the Aire and Calder; just downstream of the confluence was the ford where the ancient British road, us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Treatment
Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment. Water treatment removes contaminants and undesirable components, or reduces their concentration so that the water becomes fit for its desired end-use. This treatment is crucial to human health and allows humans to benefit from both drinking and irrigation use. Types Drinking water treatment Water contamination is primarily caused by the discharge of untreated wastewater from enterprises. The effluent from various enterprises, which contains varying levels of contaminants, is dumped into rivers or other water resources. The wastewater may have a high proportion of organic and inorganic contaminants at the initial discharge. Industries generate wastewater as a result of fabrica ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stream Gauge
A stream gauge, streamgage or stream gauging station is a location used by hydrologists or environmental scientists to monitor and test terrestrial bodies of water. Hydrometric measurements of water level surface elevation (" stage") and/or volumetric discharge (flow) are generally taken and observations of biota and water quality may also be made. The locations of gauging stations are often found on topographical maps. Some gauging stations are highly automated and may include telemetry capability transmitted to a central data logging facility. Measurement equipment Automated direct measurement of stream discharge is difficult at present. Mathematically, measuring stream discharge is estimating the volumetric flow rate, which is in general a flux integral and thus requires many cross-sectional velocity measurements. In place of the direct measurement of stream discharge, one or more surrogate measurements can be used as proxy variables to produce discharge values. I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lock (water Navigation)
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 chamber in a permanently fixed position in which the water level can be varied. (In a caisson lock, a boat lift, or on a canal inclined plane, it is the chamber itself (usually then called a caisson (engineering), caisson) that rises and falls.) Locks are used to make a river more easily navigable, or to allow a canal to cross land that is not level. Over time, more and larger locks have been used in canals to allow a more direct route to be taken. History Ancient Egypt In Ancient Egypt, the river-locks was probably part of the Canal of the Pharaohs: Ptolemy II is credited by some for being the first to solve the problem of keeping the Nile free of salt water when his engineers invented the lock around 274/273 BC. Ancient China During 960–1279 CE, the natural extension o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canal
Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport 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 discharges 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 atop a ridge, generally requiring an external water source above the highest elevation. The best-known example of such a canal is the Panama Can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Louth Navigation
The Louth Navigation was a canalisation of the River Lud. It ran for 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. The act did not provide the normal provisions for raising capital for the construction, as finance could only be obtained by leasing of the tolls. When completed, the commissioners leased the tolls to Charles Chaplin, who held ten shares and was also a commissioner, for an initial period of seven years. When the lease was due for renewal, no other takers were found, and Chaplin was granted a 99-year lease, despite the fact that the act did not authorise such an action. He collected the tolls but failed to maintain the navigation. When complaint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
