Question

define hydrological cycle explain the distribution of freshwater resources on the earth

Answer 1

Dear student

Hydrological cycle is the journey water takes as it circulate from the land to the sky and back again. The sun heats provide energy to evaporate the water from earth surface. Plants also loose water to the air this is called transpiration. When the clouds needs cool air over land, precipitation is triggered and water returns to the land Some of the precipitation soaks into the ground. Some of the under ground water is trapped between rock or clay layers this is called ground water. But most of the water flows down hill as run off, eventually returning to the sea as slightly sold water.
The stages of the cycle are:
- Evaporation
- Transport
- Condensation
- Precipitation
- Ground water- Run off
The distribution of water on the earth surface is extremely uneven. Only 3% of water on the surface is fresh, the remaining 97% resides in the ocean. Of fresh water 69% resides in glacier, 30% under ground water, and less then 1% is located in lakes, rivers, and swamps.

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