1. the branch of geology that deals with the occurrence, distribution, and movement of water beneath the Earth's surface, especially groundwater.
Usage: scientific field; typically used in singular form

Examples

• Hydrogeology is essential for understanding how contaminants spread through aquifers.
• The hydrogeology team studied the water table to assess the region's drought risk.
• Professionals in hydrogeology help design wells and manage groundwater resources.
• Climate change is affecting hydrogeology patterns in many parts of the world.
• The company hired a hydrogeology expert to evaluate the site for contamination.