Water resource.

Water resources are sources of water that are useful or potentially useful to humans. Uses of water include agricultural, industrial, household, recreational and environmental activities. Virtually all of these human uses require fresh water.

water resources are divisible into two distinct categories : the surface-water resources & the ground-water resources. Each of these categories is a part of the earth's water circulatory system,called the hydrologic cycle, & is ultimately derived from precipitation,which is rainfall plus snow. They are interdependent & frequently the loss of one is the gain of the other. The brief description of the run-off cycle,which is a part of the hydrologic cycle,will help us to understand the origin & the interdependence of these two categories of water resources.


97% of water on the Earth is salt water, leaving only 3% as fresh water of which slightly over two thirds is frozen in glaciers and polar ice caps.[1] The remaining unfrozen freshwater is mainly found as groundwater, with only a small fraction present above ground or in the air.
Sourecs of fress water.

• surface water.
• under river flow.
• ground water.
• desalination.
• froozen water.

Uses of fress water

• agricultural
• industrial.
• household.
• recreation.
• environmental

water stress.

• population growth.
• expansion of business activity.
• climate change.
• water & conflict.
• polution & water protection.
• rapid urbanization.
• deplation of aquifers.

Nepal is rich in water resource, its potantiality of electricity energy is 83000 MW.