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A catchwater drain is a land drain, a ditch cut across the fall of the land, typically just above the level of low-lying, level ground such as The Fens of eastern England, where some land, tens of kilometres from the sea is at about sea level. Its purpose is to gather water draining from the higher, sloping ground before it reaches the flat ...
Catchwater drains may take the form of concrete canals, such as in Hong Kong, where there are many.Alternatively, they may take the form of a large concrete sheet, smothering a hill, and preventing rainfall from entering the rock strata, with a smaller channeling system for transport of the water to the storage tank - this latter system is in operation in Gibraltar.
Mound systems are an alternative to the traditional rural septic system drain field. They are used in areas where septic systems are prone to failure from extremely permeable or impermeable soils, soil with the shallow cover over porous bedrock, and terrain that features a high water table.
Sedimentation (water treatment) Septic tank; Septic tank conversion [2] Sequencing batch reactor; Sewage treatment; Skimmer (machine) Slow sand filter; Stabilization pond; Supercritical water oxidation (SCWO) Thermal hydrolysis; Treatment pond; Trickle-bed reactor; Trickling filter; Ultrafiltration; Ultraviolet disinfection; Upflow anaerobic ...
Stormwater harvesting or stormwater reuse is the collection, accumulation, treatment or purification, and storage of stormwater for its eventual reuse. While rainwater harvesting collects precipitation primarily from rooftops, stormwater harvesting deals with collection of runoff from creeks, gullies, ephemeral streams and underground conveyance.
The Act enabled the North District to build a cast iron tunnel under the Fossdyke Navigation and a new drain to convey the water to the Main Drain of the South District. Additionally, they could build a catchwater drain along the edge of the higher ground to the east, which would discharge into the Fossdyke.
Combined sewer outflow into the Anacostia River in Washington, D.C. Ratcliff Beach CSO discharges into the River Thames in London [7]. These relief structures, called "storm-water regulators" (in American English - or "combined sewer overflows" in British English) are constructed in combined sewer systems to divert flows in excess of the peak design flow of the sewage treatment plant. [6]
The River Hull has served as a navigation and a drainage channel, and has been subject to the conflicts that this usually creates, as water levels need to be raised for navigation, but lowered for efficient drainage. In 1213, the Archbishops of York laid claim to the river, and declared their right to navigate on a 24-foot (7.3 m) channel.
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