geology_28 - Chapter 11 Water Resources cont Water...

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Chapter 11: Water Resources cont. Water management cont. New philosophy of water management based on geologic, geographic, climatic, economic, social and political factors Philosophy from Luna Leopold – a leader in study of rivers and water resources Strategies More SW use in wet years, more GW use in dry years Reuse and recycle water on a regular basis as well as emergencies Management of the Colorado river: Water appropriation to 7 states and Mexico Local needs vs. regional needs (Colorado River compact of 1922) The U.S. vs. Mexico (Treaty w/ Mexico in 1944) Human use vs. needs of lands (1974 Salinity Control Act) Dam construction Impact on flood frequency Impact on sediment distribution, particularly downstream Impact on wildlife habitats Water and ecosystems: General tendency : Increased human use of water, increased degradation of natural ecosystem Overall reconciliation between multiple water uses
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