Earth Sciences 1022A/B Lecture Notes - Lecture 16: Aquifer, Subsidence, Karst
10 Jan 2017
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Document Summary
Takes a long time to get water underground and is most effective by steadily rainfall soaking into the ground because heavy rain produces mostly runoff and little infiltration once plant requirements are met. Zone of saturation pores of sediment or rock are completely filled with water. Porosity volume of open space in rocks or sediment, including fractures and openings. Porosity is reduced by pores getting filled with cement and fine particles. Permeability connection of pore spaces and ability of material to transmit water. Groundwater flows under gravity in a pattern of long curving paths toward. Springs where water table meets the ground surface, may occur where an aquitard causes the local water table to be perched above the main water table. Hot springs where ground water is heated at depth then rises to surface. Geysers water boils under pressure, vaporizes and blasts water into the air, then water refills the pipe and cycle starts over again.
