"Underground water" refers to water that is stored and flows beneath the Earth's surface. It can be found in underground aquifers, wells, or other natural underground reservoirs. Full definition
The dramatic loss of momentum in irrigation expansion coupled with the depletion of underground water resources suggests that peak water may now be on our doorstep. (earth-policy.org)
The lack of chemicals means that there is less contamination to the soil or underground water supply. (myorganicformula.com)
Using the height of the building to create air flow for «passive air con» aided by cooling from underground water sources — and maximum use of natural light through translucent walls. (zerocarbonista.com)