Surat Municipal Corporation (SMC) has started aquifer mapping study in India for in river Tapi. It is the first urban local body (ULB) in the India to undertake aquifer mapping study. The aquifer mapping study requires for the aquifer-based groundwater management. They have also started setting up the French wells to supply water to the city. A heliborne survey based on electro resistivity technology (ERT) has been launched by the civic body in association of National Geophysical Research Institute (NGRI). This heliborne survey is carried out over river Tapi stretch from Magdalla in the downstream to Kamrej in the upstream for aquifer mapping.
An aquifer is an underground layer of water-bearing rock from which groundwater can be extracted using water well. The aquifer mapping used to estimate the quality and quantity of the groundwater in an aquifer. The total 268 square kilometer area will be surveyed through heliborne survey. Around 500 metre beneath the riverbed scanned to identify and locate the confined and saturated aquiferusing this survey. The Official said that, it is a seven-day survey and after completing this survey, the civic body will locate French wells inside river or along the bank, land reservations for future water supply projects.
The additional city engineer KH Khatwani said that, the aquifer mapping study will help to find out the exact location of aquifer, its size, quantum of water it can store, recharge points and French Wells. And it also provides information necessary to replenish the declining Groundwater resources.The central government conducting study based on aquifer mapping in Rajasthan, Tamil Nadu, Uttar Pradesh and Maharashtra with the help by NGRI.