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Living with Floods

IIHR International Perspectives Course 2010. Living with Floods. The big picture. the good rejuvenation of soil reconnection to the floodplain recharge of alluvial aquifers the bad b illions of dollars in flood control evacuations and lost lives destroyed crops and capital the ugly

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Living with Floods

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  1. IIHR International Perspectives Course 2010 Living with Floods

  2. The big picture • the good • rejuvenation of soil • reconnection to the floodplain • recharge of alluvial aquifers • the bad • billions of dollars in flood control • evacuations and lost lives • destroyed crops and capital • the ugly • homes and businesses filled with sediment

  3. Living as controlling • floods viewed as dangerous to people and hampering to growth • flood plains are economic centers damaged by water • examples: • the Netherlands • average elevation of 11 feet above sea level • highest GDP per sq km in Europe • the United Kingdom • 10 percent of population within 100-yr flood plain • transformed landscape

  4. United Kingdom (UK) cut-off estuaries Thames River barrier Netherlands Delta Works separated sea from estuaries tidal influences allowed in select locations Tidal Flooding

  5. Chinese (China) Yangtze and Yellow Rivers disconnect Yangzte floodplain from river to encourage settlement gained national unification lost meander and changed geomorphology raised, channelized rivers have caused flooding 1998: 4150 deaths on Yangtze 2006: Three Gorges Dam completed 2010: 117 million chinese affected by flooding with approximately 1000 missing or dead Egyptians (Ancient Egypt) accepted flooding recorded seasonal peaks used fertile sediment for agriculture Dutch (Netherlands) major floods first recorded in 838 AD successive floods in 1014, 1134, 1404, 1421, 1530, 1570, 1595, 1686, 1717, 1912, and 1953. 20th century floods inspired control structures British (UK) annually flooding along many waterways temporary and permanent barriers Seasonal Flooding

  6. Living as Coexisting • current issues with overcrowding in areas intended as flood plains • Room for Rivers • change from “battle against water” to “living with water” • rezoning to parks • flood friendly construction • pedestals • floating • open bottom levels • UK strategy • limit redevelopment • eliminate new development • set aside specific water storage areas • risk assessment • widespread insurance • warning systems http://www.cabinzoom.com/2009/01/lake-huron-floating-house/

  7. Living as Responding • most important in flash flooding • response saves lives • Albert Pike Campground in Arkansas • vital components • forecasting • broadcasting • coordination • UK • River Severn temporary structures • portable and floatable barriers

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