The Central Ground Water Board (CGWB) on Monday signed a contract with the Council of Scientific Industrial Research–National Geophysical Research Institute (CSIR-NGRI) to implement a pilot project on using advanced geophysical techniques to map shallow and deep aquifers. The project is being implemented under World Bank-funded hydrology project and would be implemented in Bihar, Rajasthan, Maharashtra, Karnataka and Tamil Nadu over a period of 15 months. The total project cost is about Rs 44.39 crore, out of which the CGWB component is about Rs 16.98 crore and NGRI's is about Rs. 27.41 crore, a Water Resources Ministry release said. — Our Bureau