Vaibhav Sharma gave a presentation on rainwater harvesting. Rainwater harvesting consists of simple systems to collect, convey, and store rainwater from roof-tops and other surfaces for direct use or to recharge groundwater. Rainwater harvesting conserves existing water resources and replenishes groundwater at a low cost while showing environmental commitment. However, it may not be applicable everywhere and collected water quality could be affected by other factors. The presentation discussed the water cycle, average rainfall patterns in India, and different storage methods and concluded that mandatory rainwater harvesting in New Delhi will help recharge groundwater levels.

1. .ppt (1)PRESENTATION ON RAIN WATER HARVESTINGBY:VAIBHAV SHARMA

2. .ppt (2)What Is Rainwater Harvesting?RWH consists of simple systems to collect, convey, and store rainwater. Rainwater capture is accomplished primarily from roof-top, surface runoff, and other surfaces.

3. RWH either captures stored rainwater for direct use (irrigation, production, washing, drinking water, etc.) or is recharged into the local ground water and is call artificial recharge. .ppt (3)Why Rainwater Harvesting?Conserve and supplement existing water resources

4. Supply water at one of the lowest costs possible for a supplemental supply source.

5. Commitment as a corporate citizen - showcasing environmental concerns

6. Replenishing local ground water, where lowering of water tables has occured.ppt (4)Why Not RWH?Not applicable in all climate conditions over the world

7. Collected water quality might be affected by external factors

8. Performance seriously affected by climate fluctuations that sometimes are hard to predict

9. Collected rainwater can be degraded with the inclusion of waste water runoff.ppt (5)CondensationLet’s take a look atThe Water CyclePrecipitationEvapotranspirationEvaporationInfiltrationSurface RunoffSurface WaterConsumptionGroundwaterSea water intrusion

10. .ppt (6)CondensationAverage Rainfall Average Annual and Monthly Precipitation – Average rainfall over one year period and monthly intervals and usually based on global atmospherePrecipitationConsumptionGroundwaterSurface Water