hydro cycle and groundwater

hydro cycle and groundwater - GEO 401 Hydrologic Cycle and...

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GEO 401 Hydrologic Cycle and Groundwater Ch 25, 27 Next lecture : Wind belts and deserts, slope stability In lab : Sedimentary and Metamorphic Rocks Lab quiz M 6/21 Hamilton Pool
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Hydrologic cycle and groundwater ² Water for human use ² Reservoirs and flows ² Groundwater ² porosity and permeability ² unconfined and confined aquifers ² Darcy’s law ² alluvial and karst aquifers ² Groundwater use and overuse
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The Water Planet Earth’s total water volume (approx. 1.46 x 109 km3) is constant over centuries
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Water for human use But only a small fraction of total water is readily available fresh water for human use
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Water for human use Fresh water for human use is unevenly distributed (and priced)
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w Reservoirs : places where water is stored w Flows: movement between reservoirs w Reservoirs gain water from inflows and lose water from outflows w inflow = outflow , reservoir volume constant w inflow > outflow, reservoir volume increases w inflow < outflow, reservoir volume decreases w Residence time: length of time a volume of water spends in a particular reservoir The Hydrologic Cycle
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SEA SEA LAND LAND + 336 Runoff from land + 398 Precipitation over sea + 434 Evaporation + 434 Evaporation – 398 Precipitation   + 436 Excess to land via precipitation + 107 Precipitation – 371 Evaporation + 436 Runoff to ocean + 107 Precipitation – 336 Runoff to ocean + 471 Evaporation Evaporation 434 Precipitation 398 Runoff  36 Groundwater table Groundwater flow Infiltration Surface runoff Precipitation 107 Evaporation 71 Flux in and flux out over oceans  is almost balanced. Excess is moved to
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This note was uploaded on 09/13/2011 for the course GEO UGS taught by Professor Shapiro during the Fall '11 term at University of Texas at Austin.

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hydro cycle and groundwater - GEO 401 Hydrologic Cycle and...

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