17 - EARTH AND PLANETARY SCIENCES 80 Professor Berry...

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EARTH AND PLANETARY SCIENCES 80 Professor Berry 3/29/10 Lecture 17 ASUC Lecture Notes Online is the only authorized note-taking service at UC Berkeley. Do not share, copy or illegally distribute (electronically or otherwise) these notes. Our student-run program depends on your individual subscription for its continued existence. These notes are copyrighted by the University of California and are for your personal use only. D O N O T C O P Y Sharing or copying these notes is illegal and could end note taking for this course. ANNOUNCEMENTS Today we have a guest speaker on water. Right now we’re changing the focus of class to water issues, and then we’ll move on to waste. This will align with the water and waste audits. Today we have Charlotte Ely with the EPA, whose project deals with the water infrastructure and climate change initiative. This is a key lecture for your final paper. LECTURE Hey there. I work for the region 9 environmental protection agency, based in San Francisco. I work with the infrastructure office. I want to go over reasons for why our program exists. The challenges we face with water in the United States include water scarcity, climate change that will be exacerbating current water challenges, increasing population tripling water demand, energy uncertainty and lastly infrastructure that is falling apart. Our water infrastructure received a D- grading from the American Society of Civil Engineers last year. How is our water used in the United States? Every 5 years, the United Stated Geological Survey puts out a report. They break down how water is withdrawn. We have different sectors including irrigation, livestock, agriculture, industrial, thermoelectric power, and public supply. The thermoelectric generation withdraws more water than any other sector in the United States. This means that in order to produce electricity, you need huge quantities of water. This goes into the water energy nexus . This means that you need water for hydropower turbines, to produce steam for thermoelectric power, and to cool equipment by absorbing the waste heat produced by power generation. In California 4 gallons of water are lost to evaporation per kWh consumed. While thermoelectric power represents half of the water withdrawn in the US, a much lower amount is actually consumed. Different types of electricity generation require
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17 - EARTH AND PLANETARY SCIENCES 80 Professor Berry...

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