Definition of Dam is as an obstruction constructed across a stream or river. At the back of this barrier water is collected forming a pool. The side on which water is collected is called upstream side and the other side of the barrier is called downstream side. The pool of water which is formed upstream is called a Reservoir.
Dams can be classified in various ways depending upon the purpose of classification, Classification by Material, Use and Hydraulic Design
Following are the types of Dams Earth Dams, Rock fill Dams, Solid Masonry Gravity Dams, Steel Dams, Timber Dams, Arch Dams, Storage Dams. Earth Dams are constructed of soil pounded and compacted into solid mass. These are constructed in areas where the foundation
Various factors which must be thoroughly considered before selecting one particular type of dam are, Topography,Geology and Foundation, Conditions, Availability of materials, Spillway size and location,Earthquake zone, Height of the Dam
The selection of Dam site for constructing a dam should b governed by the following factors. Suitable foundation must be available. For economy, the length of the dam should be as small as possible