Lecture 6 - Water Resources

Lecture 6 - Water Resources - Groundwater Groundwater terms...

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Groundwater terms Recharge zone : Area where water infiltrates downward from ground surface to groundwater Discharge zone : Area where groundwater is removed from aquifer (spring, well, river, etc.) Cone of depression : Drawdown of water table around over-pumping well Groundwater pressure surface : Level to which water will rise at outlet from confined aquifer Artesian well : Water self-rising above land surface in a confined aquifer Groundwater
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Porosity : Percentage of void (empty) space in sediment or rock to store water Permeability : Measuring the interconnection of pores in a rock material – ease with which water can pass through a substance Most permeable sediments Gravel Sand Silt Clay, Till Least permeable sediments Groundwater Movement
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Table 12.2 Groundwater Movement
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Hydraulic gradient : gradient of water table, generally following the topographic gradient;
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Lecture 6 - Water Resources - Groundwater Groundwater terms...

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