hydrogeology

hydro- +‎ geology

hydrogeology (usually uncountable, plural hydrogeologies)

1. The geology of groundwater, especially concerning the physical, biological and chemical properties of its occurrence and movement.
   • 2021 October 1, Robin Craig, “In term-opener, justices will hear Mississippi’s complaint that Tennessee is stealing its groundwater”, in SCOTUSblog:

     This issue led to an interim battle among the parties to exclude various expert witnesses regarding the aquifer's hydrogeology and a five-day evidentiary hearing before Special Master Eugene Siler in May 2019.

• hydrogeologist

• geohydrology