Groundwater, water that occurs below the surface of Earth, where it occupies all or part of the void spaces in soils or geologic strata. It is also called subsurface water to distinguish it from surface water, which is found in large bodies like the oceans or lakes or which flows overland in streams
Common Methods for Leak Detection in Subdivision Underground Pipelines
What are the key points for proper operation of geothermal well drilling?
What kind of research should be done before drilling a well in a spa?