Indians are using it from the ancient times but today, we have lost our touch with it old technique of water storage and saving. In rain harvesting, rain water is allowed to flow in to tanks, pounds or wells made inside the home, office or other places. All this allows collection of rain water these tanks. All these tanks are made in specific way that they work as natural filters of water. The main impurities and mud gets cleaned away through the porous layers.
This technology is not only useful in collecting water but it also useful in increasing the ground water level. There are lots of examples of rain harvesting system present in ancient buildings where even not a single drop of water gets wasted. Today, this technique can easily solve problem of water shortage present in many parts of
Rain harvesting can make people self sufficient in water. Rain harvesting requires a small and single time investment, further it require very less maintenance. Many Indian state governments have already encouraged rain harvesting and they are providing funds for it e.g.