Relating to the study of water movement through soil and rock, and its interaction with Earth's geological materials.
From geo- (Earth) + hydrolog- (water study) + -ic. This compound combines three Greek/Latin roots: geo (Earth), hydro (water), and -logia (study), creating a term for understanding water underground.
Geohydrologic studies matter enormously for climate change and resource management—scientists use geohydrologic principles to predict how pollutants travel through aquifers, how long groundwater takes to replenish, and whether we're draining underground water faster than nature can refill it.
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