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Groundwater flow is defined as the "...part of streamflow that has infiltrated the ground, has entered the phreatic zone, and has been discharged into a stream channel, via springs or seepage water".〔Chorley, R.J., 1978. Glossary of Terms. In: M.J. Kirkby (Ed), Hillslope Hydrology, John Wiley and Sons, Chichester, U.K.: 1-42〕 In hydrogeology it is measured by the Groundwater flow equation. Groundwater is water that is found underground in cracks and spaces in the soil, sand and rocks. The area where water fills these spaces is called saturated zone. Groundwater is stored in and moves slowly through the layers of soil, sand and rocks called aquifers. The speed at which groundwater flows depends on the size of the spaces in the soil or rocks and how well the spaces are connected. == See also == *Subsurface flow *Groundwater energy balance *Baseflow *Ecohydrology *Groundwater *Hydrogeology 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「groundwater flow」の詳細全文を読む スポンサード リンク
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