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Course: CE 70, Fall 2007School: Berkeley
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of University California, Berkeley Civil Engineering 70 Professor Ken Johnson Engineering Geology Civil Engineering 70 Lecture 22 11/13/07 Dams are not the popular in California for environmental concerns o More sustainable means of storing water would be storing in emptied aquifers Hydroelectric Dams o Pen stocks are the pipes that take water to the turbines o Tail Race Outlet is the pipes and ext the turbines...
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of University California, Berkeley Civil Engineering 70
Professor Ken Johnson Engineering Geology
Civil Engineering 70 Lecture 22
11/13/07
Dams are not the popular in California for environmental concerns o More sustainable means of storing water would be storing in emptied aquifers Hydroelectric Dams o Pen stocks are the pipes that take water to the turbines o Tail Race Outlet is the pipes and ext the turbines Why Build a Dam o Stabilize Water Supply for agriculture, municipal supply, and ecological supply o Flood Control Questionable, since dams get filled with silts and eventually provide little control Dredging is not a economical option o Recreation o Hydroelectricity Types of Dams
o Gravity Dam o Want the Shell to strong be material which is structural Rock/Coarse Sediment o The Core is Clay, an impermeable layer o Need a medium that separates Core and Shell Filter A layer of coarse to fine sand from gravel to clay o Gradational contact to prevent mixing Drainage reduce pore pressure o Popular because cheaper and material can be extracted from site Want to take away all the loose material but don't want to disrupt the environment too much Grand Coulee Dam in Washington state produced a lot of electricity to help build WWII
Lecture 22
1 of 2
11/13/07
Written By Raymond Leung
University of California, Berkeley Civil Engineering 70
Professor Ken Johnson Engineering Geology
Lecture 22
2 of 2
11/13/07
Written By Raymond Leung
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