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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 - PowerPoint PPT Presentation
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LIVING WITH FLOODS
IIHR International Perspectives Course 2010
The big picture the good
rejuvenation of soilreconnection to the floodplainrecharge of alluvial aquifers
the badbillions of dollars in flood controlevacuations and lost livesdestroyed crops and capital
the uglyhomes and businesses filled with sediment
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
Tidal Flooding
•United Kingdom (UK)• cut-off estuaries• Thames River barrier
•Netherlands• Delta Works• separated sea from
estuaries• tidal influences allowed
in select locations
Seasonal Flooding
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
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/
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