Groundwater
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 Shipot, a common source of drinking water in a Ukrainian village. |
Groundwater is water located beneath the earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore spaces or fractures and voids in rock become completely saturated with water is called the water table. Groundwater is recharged from, and eventually flows to, the surface naturally; natural discharge often occurs at springs and seeps, and can form oases or wetlands. Groundwater is also often withdrawn for agricultural, municipal and industrial use by constructing and operating extraction wells. The study of the distribution and movement of groundwater is hydrogeology, also called groundwater hydrology.
- Related: Groundwater models, Groundwater flow, Baseflow, Seep (hydrology), Spring (hydrosphere), Water well
| USGS Office of Groundwater USGS Office of Groundwater water.usgs.gov/ogw/ - Web |
| UK Groundwater Forum UK Groundwater Forum www.groundwateruk.org - Web |
| Status of Ground Water in India Status of Ground Water in India www.indiawaterportal.org/channels/groundwater - Web |
Gallery for «Groundwater»
Average relevance
| The Groundwater Foundation The Groundwater Foundation www.groundwater.org - Web |
| Groundwater Information from the Coastal Ocean Ins... Groundwater Information from the Coastal Ocean Institute www.whoi.edu/page.do?pid=11929 - Web |
| US National Ground Water Association US National Ground Water Association www.ngwa.org - Web |
| Connected Waters Initiative, University of New Sou... Connected Waters Initiative, University of New South Wales www.connectedwaters.unsw.edu.au - Web |
| American Water Resources Association American Water Resources Association www.awra.org - Web |
| Multimedia course on groundwater Multimedia course on groundwater www.indiawaterportal.org/multimedia.html - Web |
| Bibliography on Water Resources and International ... Bibliography on Water Resources and International Law www.ppl.nl/index.php?option=com_wrapper&view=wrapper&Itemid=82 - Web |
| IGRAC, International Groundwater Resources Assessm... IGRAC, International Groundwater Resources Assessment Centre www.igrac.net - Web |
Low relevance
| Groundwater Groundwater www.hydrology.nl/.../231-groundwater-geology-of-the-netherlands.html - Web |
| Groundwater level databases in the Netherlands ove... Groundwater level databases in the Netherlands overview by Loots geohydrology www.lootsgwt.com/2011/09/grondwaterstanden-interactieve.html - Web |
| Arie S.Issar. The Evolution of Groundwater Exploit... Arie S.Issar. The Evolution of Groundwater Exploitation Methods in the Middle East through History. www.chaire-rome.hst.ulaval.ca/.../revue_etat_questions_arie_issar_evolution_groundwater_exploitation_methods.htm - Web |
| US Army Geospatial Center US Army Geospatial Center www.agc.army.mil - Web |
