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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 ...
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.
The Basin formed on top of the Late Cretaceous Chalk Group, which is exposed on the dip slopes of the Chilterns and North Downs. Within the centre of the basin the Chalk is mainly covered by Palaeocene, Eocene and younger rocks, though the chalk is also brought to the surface by localised folds and faults, for example at Windsor Castle, Lewisham and Purfleet.
Drainage basin management – covers water-storage, in the form of reservoirs, and flood-protection. Water quality – includes the chemistry of water in rivers ...
It includes drainage basins which do not flow to the ocean (endorheic basins). It includes oceanic sea drainage basins which have hydrologically coherent areas (oceanic seas are set by IHO convention). The oceans drain approximately 83% of the land in the world. The other 17% – an area larger than the basin of the Arctic Ocean – drains to ...
Note that, in the UK, the terms "river basin" and "catchment" are used officially and far more frequently than the US term "drainage basin". See the lists of rivers of England , Scotland , Wales and Northern Ireland .
Anarâškielâ; العربية; Azərbaycanca; Башҡортса; Беларуская; Беларуская (тарашкевіца) भोजपुरी
In the Weald Basin, the Lower Greensand can usually be subdivided to formational levels with varying properties into, in ascending order, the Atherfield Clay Formation, the Hythe Formation, the Sandgate Formation, and the Folkestone Formation.