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esm223_15_lecturenotes_fullsize - Winter 2008, Norm Brown...

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ESM 223 Lecture 15 – California Groundwater Management (cont’d) ; Surface water – Groundwater Interaction Winter 2008, Norm Brown
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Seaside Basin Case Study [Notes from previous lecture ]
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Groundwater – Surface water Interaction • Topography, Climate, Geology [hydrogeology, geomorphology, structural geology] • Local, Intermediate, Regional • Streams – Reaches • Springs • Wetlands • Saturated & Unsaturated connections
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Time Scales • Event Flow – Quick inflow to surface system • Base Flow – Relatively lower rates of change – Usually groundwater, but can also be drainage from lakes or wetlands • Continuum of Relationship: – Clear event response Æ Interflow – Returns to seepage face (soil) Æ Return Flow (Overland Flow) – Throughflow or Displacement Flows
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Common Water Quality Constituents of Concern • Salt • Nutrients • Biological / Pathogens – Importance of residence time in hyporheic zone
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Policy and Regulatory •T M D L P r o g r a m – TMDL program specifically not authorized to involve groundwater management in California, but important because of the fact that interaction occurs (recharge)
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esm223_15_lecturenotes_fullsize - Winter 2008, Norm Brown...

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