Definition
A river is a natural flow of freshwater that flows on or through land towards another body of water downhill. This flow can be into a See more

Models
River Continuum Concept
The ecosystem of a river includes the life that lives in its water, on its banks, and in the surrounding land. … See more

Infrastructure
Modern river engineering involves a large-scale collection of independent river engineering structures that have the goal of See more

• Rivers portal
• Environment portal
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• Lists of rivers
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In hydrology, a stream order is a positive integer used to describe the level of river branching in a drainage basin. Several systems of stream order exist, one of which is the Strahler number. In this system, the first tributaries of a river are 1st order rivers. … See more

Freshwater fish make up 40% of the world's fish species, but 20% of these species are known to have gone extinct in recent years. Human uses of rivers make these species … See more