Lecture 23 - Lecture23 SubsurfaceWaters

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Lecture 23  Subsurface Waters Subsurface water= all water below ground surface Soil water= water in zone of aeration Groundwater= water in zone of saturation The majority of accessible fresh water is groundwater About 1-% of precipitation infiltrates through the zone of aeration to become groundwater in the zone  of saturation  Amount of groundwater stored in the zone of saturation is determined by the porosity o (Volume of pores divided by total volume) x 100 (%) Groundwater  movement (flux) in the zone of saturation is described by Darcy’s Law(need to know)=  q=deltaP/deltaX q=k(deltap/deltaX) o Flux is proportional to the hydraulic gradient, DeltaP/DeltaX DeltaP  =  the difference in water pressure between two locations DeltaX=distance between two locations
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Lecture 23 - Lecture23 SubsurfaceWaters

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