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2. Trench drain - Wikipedia

   en.wikipedia.org/wiki/Trench_drain

   Attaching the drainage pipes to the suspended form; Filling the trench with concrete (surrounding the form base and sides) and finishing the concrete flush with the metal frame; And after drying, removing the wooden form, cleaning the pipe inverts and placing the grates in the frame. This installation method is by far the most labor-intensive ...

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. 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 ...

5. Plumbing drawing - Wikipedia

   en.wikipedia.org/wiki/Plumbing_drawing

   A plumbing drawing, a type of technical drawing, shows the system of piping for fresh water going into the building and waste going out, both solid and liquid. It also includes fuel gas drawings. Mainly plumbing drawing consist of water supply system drawings, drainage system drawings, irrigation system drawings, storm water system drawings.

6. Drainage system (geomorphology) - Wikipedia

   en.wikipedia.org/wiki/Drainage_system...

   Dendritic drainage: the Yarlung Tsangpo River, Tibet, seen from space: snow cover has melted in the valley system. In geomorphology, drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of land, whether a particular region is ...

7. 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 ...