Hydrogeology branch is responsible for the Groundwater investigation in the country. There are several hydrological basin in all over the country. Each of those basin partakes in thousands of square kilometers of watershed area. These basins occur in different geological setting per se. Keeping in view the changing climatic patterns and consequently, the alarming condition of water shortage in future, the hydrogeology branch is active in delineating the watershed and catchment areas and establish hydrogeological basins in the country to plan a sustainable future. Additionally, it also works along coastal areas to assess the effects of seawater intrusion. This branch integrates Remote Sensing & GIS techniques and uses borehole and geophysical survey data.