GEO 101 Lecture Notes - Lecture 22: Subsidence, Saltwater Intrusion, Non-Renewable Resource
27 Mar 2017
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Document Summary
Groundwater is about 22% of the world"s fresh water. Comes from precipitation percolating through soils and sediment. Fills the open spaces in rocks, sediment, and soil beneath the surface. Groundwater is an important source for domestic, industrial, and agricultural use. Also, an important erosional agent and important energy source in some areas. All open spaces in sediment and rock are completely filled (groundwater) Water table: upper limit of zone of saturation: zone of aeration (unsaturated zone) Groundwater held by surface tension in tiny passages between grains of soil or sediment: belt of soil moisture. Water held by molecular attraction on soil particles. The percentage of a material"s volume that is open pore space. The measure of the interconnectedness of pore spaces. Aquifer: porous, permeable rock that transmits water freely. Aquitard: rock or soil later that does not transmit water easily. Artificial recharge: wastewater treatment plants or recharge pods.
