development of a multipurpose water reuse and power production system

in today’s world renewable energy is highly demanding because of increasing oil and fuelprices, desire and necessity to avert irreversible climate damage and also the unreliability of the non -renewablesources. in renewable energy, water is an important source. previously water is used only for survivalof human being as much as food but no attentionhas been givenen to economical use and conservation ofresource for domestic power generation through roof top rain water harvesting. in the modern times, thisrain water serves for several purposes. beside the production of hydel power, it is also used in crop cultivation,fi shing and as well as for drinking purpose. without doing this as a single work, we try to mergeseveral works done. in such a way, there will be a chance of increasing utilization of rain water harvesting.