Week 14 :Erosional and depositional work of subsurface water

INTRODUCTION • Almost 71% surface area of the earth is covered with liquid water in the form of streams, lakes, rivers, seas & oceans.

• Running water is considered as the most powerful of all the natural geological agents of change

• Wind, glaciers, and ocean waves are all confined to relatively limited land areas, but running water acts almost everywhere, even in deserts.

• One-fourth of the 35, 000 Cubic miles of water falling on the continents each year runs off into rivers, carrying away rock fragments with it. Running water breaks down the crust by the impact of rock debris it carries.