kuch bhi nai hain relief or drainage fatures:):D
the water flowing from rivers
the watershed is the divide line between neighbouring drainage basins precipitation landing on a particular side of the watershed will stay in that drainage basin until it is evaporated or reaches...
To protect the structure from bearing to much weight as a cubic ft of water weights over 62 LBS
A drainage net consists of all of the rivers that flow through a reigon.