Watershed Management Concept and Principles

Watershed is not simply the hydrological unit but also socio-political-ecological
entity which plays crucial role in determining food, social, and economical
security and provides life support services to rural people. The criteria for selecting
watershed size also depend on the objectives of the development and terrain slope.
A large watershed can be managed in plain valley areas or where forest or pasture
development is the main objective. In hilly areas or where intensive agriculture
development is planned, the size of watershed relatively preferred is small.

Read more http://oar.icrisat.org/3914/1/1._Watershed_Management_Concept.pdf