Question

Define river and river system. Give a detail geological work of rivers.

Answer 1

River:- A large, natural flow of water that goes across land and into the sea is called river.
River system:- A river system  is a number of rivers which consists of one main river, which drains into a lake or into the ocean, with all its tributaries. The water always comes from high to low, emptying into the river, which is called  the mouth of the river.
Geological Action of Rivers. Rivers are powerful and dynamic geological agents. The water flowing through a stream performs three kinds of geologic works as erosion, transportation and deposition. The flowing water has the force, velocity and power to generate electricity.