Hydrogeology is the scientific study of the distribution and movement of groundwater in the subsurface. This field combines elements of geology, hydrology, and environmental science to understand how groundwater interacts with geological formations and how it can be utilized as a natural resource. Hydrogeologists study various aspects of groundwater, such as its flow patterns, recharge sources, contamination risks, and availability for human consumption and agricultural use. They also help to develop strategies for managing groundwater resources sustainably and protecting them from pollution. Overall, hydrogeology plays a crucial role in ensuring the sustainable management of water resources for both human and environmental needs.