Is this a reconnaissance assessment? If so, start with gathering together what is already known about the regional surface water (e.g. streams, lakes), soils & vegetation, geology, topography, and climate (e.g. precip, temperature, humidity) in order to guide choice of appropriate hydrologic investigations.
1st find the water table in all bore wells of that region.2.Pre mansoon and post mansoon water level data based on analysis type of Aquifer property.If you government is not maintained water table data..you have to do survey your selves