NASC 130 Essentials3_ch12

Rock energy mineral resources geothermal energy energy

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Unformatted text preview: tials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Geothermal Energy Geothermal energy is utilized in two ways Hot water is pumped and used to heat buildings Steam is used to drive electric turbines Steam Geothermal is a dominant energy source in some areas Iceland New Zealand Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydroelectric Power Flowing water turns potential energy into kinetic energy This energy does work by eroding and moving sediment Hydroelectric power dams arrest the flow of water Water is directed past turbines to create electricity Some dams generate electricity via tidal flux Some Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydroelectric Power Positive aspects: Positive Reduces the risk of floods Impounds water for drinking, Impounds irrigation, and recreation irrigation, Provides renewable energy Provides without creating wastes without Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Hydroelectric Power Negative aspects: Dams destroy valued landscapes and alter ecosystems Reservoirs accumulate the sediment load of the river Sediments added to reservoirs require expensive dredging Erosion is accelerated downstream of dams Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches...
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This document was uploaded on 11/25/2013.

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