CE361 - Lecture 13

CE361 - Lecture 13 - 2/24/2009 Water Resources Engineering...

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2/24/2009 1 Water Resources Engineering -Lecture±13 1 Prepared by T. Wagener & P. Reed Penn State University Groundwater Flow 2 Water in the saturated region of the subsurface is referred to as groundwater.
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2/24/2009 2 Content 1. Groundwater Concepts 2. Saturated Flow 3 3. Groundwater in Natural Formations GROUNDWATER CONCEPTS 4
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2/24/2009 4 Groundwater in the US 7 http://water.usgs.gov/ogw/pubs/fs00086/pdf/fs-086-00.pdf Rainwater Harvesting in India In essence, harvesting water means harvesting the rain. In India, the monsoon is a deluge. Flash floods churn up dry river beds. Dry wells come to life; lakes and ponds brim with water. In India the monsoon is brief. We get about 100 hours of rain in a year. It is this 100-hour bounty that must be caught, stored, and used over the other 8 660 hours that make up a year 8 other 8,660 hours that make up a year. http://www.rainwaterharvesting.org/Solution/Solution.htm
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2/24/2009 5 Rainwater Harvesting in India Artificial recharge to groundwater is a process by which the ground water reservoir is augmented at a rate exceeding that obtaining under natural conditions or replenishment. Any man-made scheme or facility that adds water to an aquifer may be considered to be an artificial recharge system. 9 http://www.rainwaterclub.org/docs/WF4-05_Rainwater_Harvesting.pdf Relevance of Groundwater • Of the total amount of freshwater on this planet, about 30 1% is contained in the subsurface – it about 30.1% is contained in the subsurface it is groundwater. • This is particularly important since another 69.6% is held in ice caps and glaciers. • Groundwater is an important resource in many areas. It is often a preferable source because of 10 water temperature, quality, or accessibility.
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2/24/2009 6 SATURATED FLOW 11 The Saturated Zone 12
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2/24/2009 7 Let’s Picture the Flow of Water in a Porous Medium
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CE361 - Lecture 13 - 2/24/2009 Water Resources Engineering...

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