What does drainage basin mean? What is a watershed and why should I care? A drainage basin is the source for water and sediment that moves from higher elevation through the river system to lower elevations as they reshape the channel forms. Gratuit. Because drainage basins are coherent entities in a hydro-logical sense, it has become common to manage water resources on the basis of individual basins. A portion of the water that enters the groundwater system beneath the drainage basin may flow towards the outlet of another drainage basin because groundwate… A portion of the water that enters the groundwater system beneath the drainage basin may flow towards the outlet of another drainage basin because groundwater flow directions do not always match those of their overlying drainage network. The catchment is the most significant factor determining the amount or likelihood of flooding. In a strict sense, all drainage basins are hydrologic units but not all hydrologic units are drainage basins.[8]. Cycleau - A project looking at approaches to managing catchments in North West Europe, flash animation of how rain falling onto the landscape will drain into a river depending on the terrain, StarHydro – software tool that covers concepts of fluvial geomorphology and watershed hydrology, Florida Watersheds and River Basins - Florida DEP, List of rivers that have reversed direction, A Directory of Important Wetlands in Australia, Bangladesh Haor and Wetland Development Board, https://en.wikipedia.org/w/index.php?title=Drainage_basin&oldid=991247644, Articles with dead external links from December 2017, Articles with permanently dead external links, Short description is different from Wikidata, Articles with unsourced statements from January 2017, Creative Commons Attribution-ShareAlike License, About 48.7% of the world's land drains to the, Just over 13% of the land in the world drains to the, This page was last edited on 29 November 2020, at 02:15. Land use can contribute to the volume of water reaching the river, in a similar way to clay soils. Management of such basins becomes the responsibility of the countries sharing it. The drainage basin, also known as the basin, or (in North America) the basin that pours all precipitation into a single torrent or a set of streams. The exit is the end of the drainage basin and is also referred as a watershed and catchment area. Generally, topography plays a big part in how fast runoff will reach a river. For example, the total area drained by the Mississippi River constitutes its drainage basin, whereas that part of the Mississippi River drained by the Ohio River is the Ohio’s drainage basin. Drainage basins are similar but not identical to hydrologic units, which are drainage areas delineated so as to nest into a multi-level hierarchical drainage system. Bioregional political organization today includes agreements of states (e.g., international treaties and, within the US, interstate compacts) or other political entities in a particular drainage basin to manage the body or bodies of water into which it drains. Per the lie of channels, drainage systems can fall into one of several categories, known as drainage patterns.These depend on the topography and geology of the land.. All forms of transitions can occur between parallel, dendritic, and trellis patterns. Shape will contribute to the speed with which the runoff reaches a river. Management of shared drainage basins is also seen as a way to build lasting peaceful relationships among countries.[14]. This is known as the global hydrological cycle. Forums pour discuter de drainage basin, voir ses formes composées, des exemples et poser vos questions. The drainage basin acts like a funnel - collecting all the water within the area covered by the basin and channeling it into a waterway. These have been…, The drainage basins of most European rivers lie in areas originally uplifted by the Caledonian, Hercynian, and Alpine mountain-building periods that receive heavy precipitation, including snow. Measurement of the discharge of water from a basin may be made by a stream gauge located at the basin's outlet. This includes water from rain and melting snow. Corrections? The boundary of the drainage basin is called a drainage divide. [ drā ′nĭj ] An area drained by a river system. All water that falls on that land flows into one river. In … Learn more. In hydrology, the drainage basin is a logical unit of focus for studying the movement of water within the hydrological cycle, because the majority of water that discharges from the basin outlet originated as precipitation falling on the basin. Few examples of arrangements involving management of shared river basins. [ 8 ] the waterways be on the for! 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