Groundwater hydrology is a branch of hydrogeology that focuses on the study of the distribution and movement of groundwater in the subsurface. It involves investigating the properties of aquifers, the processes of groundwater recharge and discharge, and the interactions between surface water and groundwater. Groundwater hydrology plays a crucial role in water resource management, as groundwater is a vital source of drinking water and irrigation for many communities around the world. Researchers in this field use various methods such as numerical modeling, field observations, and laboratory experiments to study the behavior of groundwater systems and develop sustainable strategies for groundwater management and protection.