CE361 - Lecture 11

CE361 - Lecture 11 - 2/19/2009 Water Resources Engineering...

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2/19/2009 1 Water Resources Engineering Engineering Lecture11 Infiltration/ Unsaturated Flow Prepared by T. Wagener & P. Reed 1 2
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2/19/2009 2 Content 3 CLOUD FORMATION PRECIPITATION * * * * * * * * SNOWMELT FROM EVAPORATION INFILTRATION IL OVERLAND FLOW SPRING INTERCEPTION WT RUNOFF WT DEPRESSION STORAGE FALLING RAIN FROM WET VEGETATION AND PUDDLES SOIL MOISTURE WATER TABLE (WT) TRANSPIRATION FROM SOIL FROM STREAMS AND OPEN WATER Modified from Brutsaert, 2005. Hydrology . Cambridge University Press GROUNDWATER BASE FLOW IMPERMEABLE LAYER (IL) STREAM FLOW WT LAKE OR SEA 4
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2/19/2009 3 WHY IS THIS RELEVANT? 5 6
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2/19/2009 4 7 RELEVANT TERMINOLOGY 8
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2/19/2009 5 What happens to water in a watershed? 9 Infiltration is the process of water entering into the soil The rate of infiltration is impacted by •The condition of the soil •Vegetative cover •Soil properties – (porosity, hydraulic conductivity, moisture content) 10 How does vegetation cover change infiltration?
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2/19/2009 6 The subsurface can be broken up into different zones 11 Capillary Pressure Head 12
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2/19/2009 7 Subsurface Processes (Percolation) 13 Unsaturated Porous Medium (e.g. Soil) 14
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CE361 - Lecture 11 - 2/19/2009 Water Resources Engineering...

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