1. PRESENTED BY :
RENJITHA .R.S.
SOCIAL SCIENCE OPTIONAL
ROLL NO: 22
KUCTE, KUMARAPURAM

2. The act by man to help the rain water to
percolate into the earth and replenish the
water table.

3. RAIN WATER
HARVESTING

4. •To prevent the depletion of underground
water and to raise the water table.
• To reduce the rate of surface runoff.
• To prevent soil erosion.
• To increase awareness of conserving water.

5. • Man has used up more than 50% of the water
available on the planet.
• More than 100 crore people do not have
drinking water.
• More than 300 crore people do not have water
for their basic needs.
• Increase in population decreases the per capita
availability of water.

6.  Surface runoff harvesting.
 Roof top rainwater harvesting.

9. after the first rain, open the valve and led the
collected water to flow off.
 the roof tops should be clean and free from dust,
and other pollutants.
 do not use paint on roof tops.
do not use the roofs for any other purpose.
 the pipes should be protected with a net covering.
 before recharging the underground water, a proper
filter should be used.

10. THANK YOU