What types of dam are in …

A dam is a hydraulic structure of fairly impervious material built across a river to create a reservoir on its upstream side for impounding water for various purposes.
These purposes maybe IRRIGATION, HYDROPOWER, WATER-SUPPLY, FLOOD CONTROL, NAVIGATION, FISHING and RECREATION.
Dams may be classified into number of ways.

:STORAGE DAM=They are constructed to store water during rainy season when there is a large flow in the river.

: DIVERSION DAMS=A Diversion dam is constructed for the purpose of diverting water of the river into an off taking canal.

: DEBRIS DAMS= A debris dam is constructed to retain debris such as sand,gravel,and drift wood flowing in the river with water. The water passing after debris dam is relatively clear.

:COFFER DAMS=It is an enclosure constructed around the construction site to exclude water so that construction can be done in dry.
etc.