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  2. Trap (plumbing) - Wikipedia

    en.wikipedia.org/wiki/Trap_(plumbing)

    In domestic applications, traps are typically U, S, Q, or J-shaped pipe located below or within a plumbing fixture.An S-shaped trap is also known as an S-bend.It was invented by Alexander Cumming in 1775 but became known as the U-bend following the introduction of the U-shaped trap by Thomas Crapper in 1880.

  3. Watershed delineation - Wikipedia

    en.wikipedia.org/wiki/Watershed_delineation

    Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin.It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.

  4. Drainage basin - Wikipedia

    en.wikipedia.org/wiki/Drainage_basin

    Drainage basin of the Ohio River, part of the Mississippi River drainage basin. In hydrology, the drainage basin is a logical unit of focus [clarification needed] for studying the movement of water within the hydrological cycle. The process of finding a drainage boundary is referred to as watershed delineation. Finding the area and extent of a ...

  5. Drainage density - Wikipedia

    en.wikipedia.org/wiki/Drainage_density

    Consequently, a drainage basin with a relatively higher drainage density will be more efficiently drained than a higher density one. [7] Because of the more extensive drainage system in a higher density basin, precipitation entering the basement will, on average, travel a shorter distance over the slower hillslopes before reaching the faster ...

  6. Catchwater - Wikipedia

    en.wikipedia.org/wiki/Catchwater

    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.

  7. Catchwater drain - Wikipedia

    en.wikipedia.org/wiki/Catchwater_drain

    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 ...

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