RWH roof well soil later means shaft rivers runoff deep pit recovery borehole reservoir extraction collection subsurface water cycle river water urban areas ground water potable water rainwater ASR deep drainage primary method reclaimed water Aquifer storage allegianceindia deep percolation direct injection subsequent reuse hydrologic process longer-term storage other area surfaces Rainwater harvesting stormwater harvesting surface water supplies anthropogenic processes artificial groundwater recharge More Details Contac Us Allegiance Water Management