This document discusses various methods of rainwater harvesting including surface runoff harvesting, roof top rainwater harvesting, and agricultural techniques like multi-storied cropping, mulching, strip cropping, contour cropping, bench terracing, stone pitched bunds, rain water pits, and check dams. It also discusses how roof top rainwater harvesting collects rainwater from building roofs to recharge underground water sources.

2. NEW B.Ed. COLLEGE
NELLIMOODU,
THIRUVANATHAPURAM-695 524
B.Ed.COURSE 2014-2015

3. POWERPOINT PRESENTATION
NAME:KRISHNENDU.K
SUBJECT:SOCIAL SCIENC
CANDIDATE CODE:169/14376017

4. TOPIC:
Rainwater Harvesting
std: IX

5. We can understand the importance of preservation of water from
this picture.
Rainwater Harvesting is an act to raise water table.

6. Surface runoff Harvesting Roof top Rainwater Harvesting
Rainwater Harvesting

7. Surface Runoff Harvesting
Water Conservation Through
Construction
Agriculture method
Multi Storied cropping
Mulching
Strip cropping
Contour Cropping
Bench Terracing
Stone Pitched Bunds
Rain Water Pits
Check Dams

8. Multi-Storied Cropping
Different type of crops that grow in
different heights and are suitable for each area are
cultivated here.

9. Mulching
If mulching is done with the agricultural waste like
leaves and other waste materials ,it will help to conserve
the soil and the moisture in that area.

10. Strip Cropping
Farming different crops alternately on gentle slopes is
strip cropping.

11. Contour cropping
Farming which is done in terraces at different levels on
hill slopes is known as contour cropping.

12. Bench Terracing
The slopes are being converted into terraces
and farming is done here . This helps in protecting
the soil and water.

13. Stone Pitched Bunds
In this method a stone wall is constructed
across the slopes which allows the soil to settle
down forming level terraces.

14. Rain Water Pits
Rain water pits are made to retain rain water for a
long time so that it can slowly seep into the earth.

15. Check Dams
The water that runs through canals and streams
are dammed and the flow of water is partially obstructed .
This prevent soil erosion.

16. ROOF TOP HARVESTING
The rain water that falls on the roofs of buildings are
collected in reservoirs or recharge system helps in enriching
the source of underground water.

17. ENRICHMENT PROGRAMME
Explain various type of rain water harvesting and how
much they help to raise under ground water?