Lecture26 - Quote of Day o one can take your integrity from...

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Unformatted text preview: Quote of Day o one can take your integrity from you, you can only squander it away. Groundwater Processes involved in the hydrologic cycle Precipitation Evaporation Transpiration Infiltration Runoff Figure 16.3 R i v e r s / s t r e a m s G r o u n d w a t e r Groundwater is water found in pores of soil and sediment, plus narrow fractures in bedrock Importance of groundwater Figure 16.2 Groundwater is the largest reservoir of fresh water that is readily available to humans Importance of groundwater Figure 17.2 Distribution of groundwater Terminology Zone of aeration Soil moisture Intermediate zone Capillary fringe Water table Zone of saturation Figure 17.2 Distribution of groundwater Zone of aeration Pore spaces are wholly or partly filled with air from the atmosphere. Water cannot be pumped by wells from this zone Water moves down from land surface into and perhaps through the zone of aeration due to gravity. Figure 17.2 Distribution of groundwater Terminology Zone of aeration Soil moisture moisture retained in the soil horizon (i.e., the top layer that contains humus) water is held by molecular attraction on soil particles (i.e., keeps the water from continuing to migrate down due to gravity) Figure 17.2 Distribution of groundwater Terminology Zone of aeration Soil moisture Intermediate zone Capillary fringe Extends upward from the water table Water is held by surface tension in tiny passages between grains of soil or sediment Surface tension http://www.epa.state.oh.us/pic/mercury/mercury_drop_copy.JPG http://www.joebly.com/asort-Water_Drop_Texture.jpg http://www.gurureports.org/images/wax_cover.150x194.jpg Weight of bubble causes ball to deform Mercury on most surfaces form distorted spheres Water on waxed surfaces beads up Water coats mineral surfaces and does not bead up Capillary Action water Clothes that wick sweat away...
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This note was uploaded on 04/18/2011 for the course EAS 101 taught by Professor Kirschner during the Spring '11 term at Saint Louis.

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Lecture26 - Quote of Day o one can take your integrity from...

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