sir,i am want to include rain water harvesting system in my house for 32*60 ft p

Rain water harvesting is an age-old system of collection of rain water for future use. The systematic collection and recharging of ground water recently gaining importance as one of the most feasible and easy to implement remedy to restore the hydrological imbalance and prevent a crisis.
                 
There are two main techniques of rain water harvesting, one is storage of rainwater on surface for future use and other is recharge rainwater to ground. In this article we provide details about Building Bye-Laws, about use of ground water, rain water harvesting and roof top rainwater harvesting.
   
Amendment To Building Bye-laws:
                                         
The rising demands of water in urban area cannot meet through available surface water. To meet the demand, ground water is used and over-exploited resulting in decline of the ground water levels and deterioration of the ground water quality. To over come this situation, Government amended the Building Byelaws in august, 2001 making water harvesting through storing of water run off including rain water in all new buildings on plot of 100 sq. meters and above mandatory in National Capital Territory of Delhi with immediate effect.

Roof Top Rain Water Harvesting System:
                                         
Roof top rain water harvesting is technique through which rain water is captured from the roof catchments and store in reservoirs to meet the house hold needs. The catchments area also includes compounds or artificially prepared impervious/ semi-pervious land surface. The latest development in efficient and scientific design of ground water recharge structures has provided impetus for systematic collection of roof top rain water for recharging the sub surface ground water aquifer. This process enhances the availability, reliability and quality of ground water at specific place and time.

Advantages of roof top rain water systems:
                        
1. Rain water harvesting system to recharge the ground water, enhance the availability of ground water and assures continuous and reliable access to ground water.
2. Capturing and storing rain water for use is particularly important in dry land, hilly, urban and coastal areas.
3. Save the energy, for 1-meter rise in ground water level is around to save 0.40Kwh of electricity.
4.The problem of choking the storm water drain is reduced due to reduced surface runoff of rain water.
5.Avoid Flooding of roads.
6.Reduce soil erosion.
7.Reduce the cost of pumping of ground water.
8.Reduce ground water pollution and improve the quality of ground water through dilution.
9.Recharged ground water provides good quality water which is soft and low in minerals.
10.The roof top rain water harvesting is less expensive, easy to construct, operate and maintain.