Hydrogeology is the science of subterranean water. This science studies the interactions between subterranean geological structures (the nature and structure of the rocks and soils) and both subterranean water and surface water.
Thoroughly inter-disciplinary (geology, pedology, chemistry, hydraulics etc.), hydrogeology is involved in many fields such as water exploitation of course, but also agriculture, civil engineering and the production of geothermal or hydrothermal energy.
This science also makes it possible to monitor subterranean water resources both qualitatively and quantitatively.
A hydrogeologist inspecting a drilling breakdown. © Hydraulique sans Frontières CC by-nc-nd 3.0