Global hydrological cycle

Manzar abbas khan
student of Pir Mehr Ali shah arid agriculture university rawalpindi pakistan
Email:[email protected]

1. Global Hydrological cycle Presented by Manzar Abbas Khan Department of Soil science

2. What is Global hydrological cycle? T he continuous movement of  water  on, above and below the surface of the  Earth. The global hydrological cycle is powered by solar energy. It is a closed system, in continual circulation . There is a definite amount of water in the system and this amount does not change.

3. Water distribution 70% of the Earth’s surface is covered with water. BUT 97.5% of this water is salt water (ocean). Only 2.5% of the planet’s water is fresh water,and only 1% of that exists on Earth’s surface It includes , 1 %=lakes, rivers , 20 %=groundwater  79%=ice caps and glaciers

4. Water distribution

5. Proceses involve in hydrological Cycle Evaporation Condensation Transport Precipitation Groundwater Transpiration Runoff

6. Hydrological cycle

7. Proceses involve in hydrological Cycle Evaporation   The transformation of water from a liquid into a gas, a process which humidifies the atmosphere. Condensation The transformation of water from a gas into a liquid, and the processes that lead to condensation. Transport The movement of water through the atmosphere. Precipitation   The transfer of water from the atmosphere to land. Rain, snow, hail, sleet, and freezing rain are discussed. Groundwater   Water located below ground and how it returns to the surface. Transpiration   Transfer of water to the atmosphere by plants and vegetation. Runoff Rivers, lakes, and streams transport water from land to the oceans. Too much rainfall can cause excess runoff, or flooding.

8. Thanks