Normally they would build a dam over a valley with a high amount of rainfall per year, this then would collect behind the dam and gradually get bigger. The river basin will ensure new tributaries and branch off and may eventually lead into the valley (valleys are made by rivers normally from the past) so the gravity will pull it into the easier path downstream towards the dam. While building a dam the company would normallu install a hydroelectric power plant to ensure the energy is put to good use. Hope that helped. It happens in some cases.
World Commission on Dams was created in 1998.
Low-head dams are dangerous because people fail to realize that these dams are just as dangerous as larger dams. The movement of the water at the base can pull people under and trap them. These low-head dams have been nicknamed 'drowning machines.'
They can assist in controlling flooding on many rivers. Dams can by used to create hydro-electric power. The lakes created are often great recreation areas.
When trees are planted and when dams are created then it is possible for the floods to stop
resevoirs
dams
vast reservoirs created behind numerous dams for easier navigation
there are about 50 dams
Man Made dams are constructed for several reasons. One may construct a dam to balance water height or achieve agricultural irrigation.
The Tennessee Valley Authority Act created a public corporation that was authorized to build dams and electrical generating-plants.
Platypuses do not live in dams like beavers do, or dams that are artificially created for storing water. Platypuses dig their burrow in riverbanks or creek banks, usually underneath an overhang of earth or tree roots, in order to disguise the entrance.
how many dams in the river rhine11 dams whith hydropower stations .