dug cost hour parks shaft Types tanks roads summer desert relief people energy pumping Islands balance decline control drought rooftops 1m. rise two ways minerals salinity cleaning dilution handpumps later use roof area inlet pipe first step reservoirs future use Advantages individuals lower level urban areas septic tank installation storage tank chlorination open grounds domestic use water levels soil erosion storm drains water supply Excess water overflow pipe flooding area contamination coastal areas desilting pit surface runoff limited extent hilly terrains Main Objective alluvial areas Such tubewells 0.40 kilo watt specific design roof catchments household needs allegianceIndia inverted filter drinking purpose preferred source simple technique rainwater system self-sufficiency increasing demand existing tubewells filtering material subsurface aquifer good quality water high quality water ground water level speed breaker plate Harvested rain water ground water storage Rainfall Reliability fresh water aquifers dryland, hilly, urban Collection Efficiency several considerations ground water pollution Collection efficiencies Average monsoon rainfall domestic water requirement Allegiance Water Management fresh-saline water interface Rainwater harvesting systems artificial recharge techniques Roof Top Rain Water Harvesting sub-surface ground water reservoir Rooftop Rainwater Harvesting System Rooftop rain water harvesting systems Artificial Ground water Recharge System