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Catchment areas may be established for the provision of services. For example, a school catchment area is the geographic area from which students are eligible to attend a local school. When a facility's capacity can only service a specific volume, the catchment may be used to limit a population's ability to access services outside that area. [11]
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 internal endorheic basins.
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.
Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, [3] [4] and impluvium. [ 5 ] [ 6 ] [ 7 ] In North America, they are commonly called a watershed , though in other English-speaking places, "watershed" is used only in its original sense, that of the drainage divide line.
Catchment zone in Nattai, Australia containing drinking water. Catchment hydrology is the study of hydrology in drainage basins. Catchments are areas of land where runoff collects to a specific zone. This movement is caused by water moving from areas of high energy to low energy due to the influence of gravity.
Major drainage divides (yellow and red ridgelines [1]) and drainage basins (green regions) in Europe. A drainage divide, water divide, ridgeline, [1] watershed, water parting or height of land is elevated terrain that separates neighboring drainage basins.
The most prominent rivers in the catchment area are Dnieper with a length of 2,201 kilometres (1,368 mi) and Desna, with a length of 1,130 kilometres (700 mi). [5]Many small direct tributaries also exist, such as, in the Kyiv area, the Syrets (right bank) in the north of the city, the historically significant Lybid (right bank) passing west of the centre, and the Borshahivka (right bank) to ...
Klepáč – one of six places in Europe where three watersheds meet Rhine–Danube watershed marker near Weitnau, Germany European watershed marker (Lviv Oblast, 2009). The divide continues northwards along the Albula Alps to Julier Pass, Albula Pass and Flüela Pass south of Davos, between the catchment area of the Rhine, which empties into the North Sea via the Netherlands, and the Danube ...