A river basin drains all of the land around a major river. Basins are divided into watersheds, or land areas that surround a small, river or lake. River basins drain all of the land that surrounds a major river. The way that people treat their natural environment including the soil, water, air, plants and animals has an effect on the efficiency of river basins. When a river travels downstream, it carries with it gravel, sand and silt.
In addition, bacteria and chemicals are transported. The main features of a river basin are the source, mouth, watershed, tributary and confluence. Subscribe to the Safeopedia newsletter to stay on top of current industry trends and up-to-date know-how from subject matter authorities.
Our comprehensive online resources are dedicated to safety professionals and decision makers like you. By: Daniel Clark. A river basin comes closer than any other defined area of land, with the exception of an isolated island, to meeting the definition of an ecosystem in which all things, living and non-living, are connected and interdependent. A watershed is simply the area of land that catches rain and snow and drains or seeps into a marsh, stream, river, lake or groundwater.
Both river basins and watersheds are areas of land that drain to a particular water body, such as a lake, stream, river or estuary. In a river basin, all the water drains to a large river. If you've found the resources on this site useful please consider making a secure donation via PayPal to support the development of the site.
What is a river basin? River basins have typical features, these include: Tributary — a smaller river or stream flowing into a larger river. A confluence — where a river joins another river. The main features of a drainage basin.
Related Topics Use the images below to explore related GeoTopics. The River Tees — landforms of erosion and deposition. The picture above shows the different river basins in Europe. It would be very tedious to determine the river basin or watershed area by tracing every drainage pathway the outlet to the topographic boundary. Fortunately, we can use some neat trick from linear algebra and graph theory to efficiently determine the area that drains through any given point.
If we divide an area into elements and assign to each element only the element into which it drains, we can readily derive global watershed properties from this local information.
All watershed software is based on these principles. A very simple example of six pixels is given to the left. Assume each circle is an area that all areas together fill part of a plane. Such a system of nodes and links or edges is called a graph. This particular type of graph is called a "tree" because, well, it looks like a tree.
For our example, this would look like:. One could say that the ones indicate which node n row is one step removed from node m column.
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