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[7] The sediment yield of a river is the quantity of sand per unit area within a watershed that is removed over a period of time. [11] The monitoring of the sediment yield of a river is important for ecologists to understand the health of its ecosystems, the rate of erosion of the river's environment, and the effects of human activity. [11]
Water pollution occurs when water bodies, such as rivers, lakes and oceans are contaminated with harmful substances. These substances degrade the water quality and are toxic to humans as consumers and to the environment. [7] The contamination in a river can come from a point source or non-point source pollution. [8]
Important physical processes within the water cycle include (in alphabetical order): Advection: The movement of water through the atmosphere. [6] Without advection, water that evaporated over the oceans could not precipitate over land. Atmospheric rivers that move large volumes of water vapor over long distances are an example of advection. [7]
Rivers get their alluvium from erosion, which carves rock into canyons and valleys. Rivers have sustained human and animal life for millennia, including the first human civilizations. The organisms that live around or in a river such as fish, aquatic plants, and insects have different roles, including processing organic matter and predation.
A river valley civilization is an agricultural nation or civilization situated beside and drawing sustenance from a river. A river gives the inhabitants a reliable source of water for drinking and agriculture. Some other possible benefits for the inhabitants are fishing, fertile soil due to annual flooding, and ease of transportation.
The Deccan rivers system consists of rivers in Peninsular India, that drain into the Bay of Bengal and the Arabian Sea. There are numerous short coastal rivers, predominantly on the West coast. There are few inland rivers, which do not drain into sea. [2] [3] Most of the rivers in India originate from the four major watersheds in India.
The Peninsular Rivers are mostly fed by the rainfall. During the summer, their discharge is significantly less. Some of their confluents indeed get dehydrated, purely to be regenerated in the monsoon. The catchment region of the Godavari River in the peninsula is the biggest in India, covering a territory of around 10% of the whole country.
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.