Original Research Article
Vallabhbhai Kalam
Abstract
Climate change may influence hydrogeological processes and groundwater resources directly and indirectly in various modes. Therefore, a systematic planning, management and adaption are challenging task. Considering the importance of climate change impact, the study was to identify the sustainable Groundwater (GW) / Drinking Water (DW) resources potential zones, suitable locations for GW harvesting structures, recommendation for GW quality management and GW extraction methods for Dhubri District of Assam, India and also with emphasis on Non-Covered (NC) and Partially-Covered (PC) habitations in the rural area of Dhubri District. The quality and quantity of GW/DW resources potential of the region is under extreme threat due to frequent flood, drought and population pressure. geographic information system (GIS) and Remote sensing (RS) technology along with on-field investigations were used to achieve the goal. GW availability is controlled by the local hydrogeomorphology, geology and geological structures of the area. Based on these controlling factors the GW resource Potential Zone Maps of the study area were prepared. Well inventorisation was also carried out including depth to water level, water level fluctuation, yield range and well-type, etc. It was found that more than half of the area falls under shallow GW table zone. The GW resource potential zones were successfully delineated based on Weightage Value (WV). The entire study area has been classified into various classes that is, excellent, very good, good, moderate and poor. To enhance and manage the GW resources in this area, GW recharge structures such as check-dams, percolation tanks and recharge-pits were suggested. Various types of GW extraction methods such as, Ring Well (RW), Tube Well(TW), Bore Well(BW) were recommended for this region.