<P> Rivers are often managed or controlled to make them more useful, or less disruptive, to human activity . </P> <Ul> <Li> Dams or weirs may be built to control the flow, store water, or extract energy . </Li> <Li> Levees, known as dikes in Europe, may be built to prevent river water from flowing on floodplains or floodways . </Li> <Li> Canals connect rivers to one another for water transfer or navigation . </Li> <Li> River courses may be modified to improve navigation, or straightened to increase the flow rate . </Li> </Ul> <Li> Dams or weirs may be built to control the flow, store water, or extract energy . </Li> <Li> Levees, known as dikes in Europe, may be built to prevent river water from flowing on floodplains or floodways . </Li>

Essay on autobiography of a river in english