Dictionary entry overview: What does river basin mean? New home construction, primarily on steep slopes, is increasing steadily. Other endorheic regions include the Great Basin in the United States, much of the Sahara Desert, the drainage basin of the Okavango River (Kalahari Basin), highlands near the African Great Lakes, the interiors of Australia and the Arabian Peninsula, and parts in Mexico and the Andes. In North America, this function is referred to as "watershed management". Each drainage basin is separated topographically from adjacent basins by a perimeter, the drainage divide, making up a succession of higher geographical features (such as a ridge, hill or mountains) forming a barrier. A drainage basin is any area of land where precipitation collects and drains off into a common outlet, such as into a river, bay, or other body of water. COBUILD Advanced English Dictionary.  In North America, the term watershed is commonly used to mean a drainage basin, though in other English-speaking countries, it is used only in its original sense, that of a drainage divide. Pointsource discharges are not a current major pollutant of the Hiwassee River basin. The river’s regime is now controlled by a series of dams situated on the Nile itself or on one of its various tributaries; of these, the largest is the Aswan High Dam on the main Nile. 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. See more. Mussels, crayfish, snails, salamanders, and many species of freshwater fish, such as native brook trout, are then at risk due to poor water quality and altered hydrology. Yangtze River Basinrefers to the 11 provinces (such as Qinghai Province, Tibetan, Sichuan Province, Yunnan Province and Chongqing) the mainstream and tributaries of Yangtze River flow through. There will be a continuing need to balance water releases to meet human and aquatic ecosystem needs. Exotic pathogens and parasites pose serious threats to the rare species inhabiting the Little Tennessee River basin. Highway development and construction pose significant threats to many areas of the French Broad River basin, along with poorly managed steep slope development contributing runoff and sedimentation. A river basin sends all the water that falls within it to a central river, and from there to the ocean. Measurement of the discharge of water from a basin may be made by a stream gauge located at the basin's outlet. https://www.alachuaconservationtrust.org/santa-fe-river-basin 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. Drainage basins connect into other drainage basins at lower elevations in a hierarchical pattern, with smaller sub-drainage basins, which in turn drain into another co… In addition to nonpoint source pollution, point source pollution (such as municipal waste water treatment plants, selenium ash pond discharge, industrial facilities, small package treatment plants, and urban and industrial storm-water systems) can degrade aquatic habitats. Shape will contribute to the speed with which the runoff reaches a river. Around 18% of all land drains to endorheic lakes or seas or sinks. This project uses GIS to model and map the continental United States land areas most important to surface drinking water, the role forests play in protecting these areas, and the extent to which these forests are threatened by development, insects and disease, and wildland fire. In the Thiessen polygon method, the drainage basin is divided into polygons with the rain gauge in the middle of each polygon assumed to be representative for the rainfall on the area of land included in its polygon. These basins contain the headwaters of streams and rivers that provide a critical supply of fresh water to towns and cities in and outside of the region. , carries it out to sea the waters more susceptible to runoff also emerge from the non-native... Use ( paved or roofed areas ) been historically important for determining territorial boundaries, particularly in tributaries. 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