Sea Level Rise and Coastal Disasters Summary of a Forum, October 25, 2001, Washington DC (2002) / Chapter Skim
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Natural Disasters Roundtable
Natural Disasters Roundtable
Pages 1-10
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are most vulnerable to rising sea levels. To address science and policy issues associated with Me combined problems of sea level rise and coastal disasters, Me ~DR steering committee selected an interdisciplinary group of speakers and panelist>; (See Addenda A for Ale agendas ADDendix C for speakers bios1.
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Tn fac~ ~ has taken over ~ century for average sea kvel ~ nse TS ~ ~~as ct at., 2001~- ALng the U.~. Mast Coast ~ average of lo ~ of subsidence ts added ~ (he 18~n of rtse Icing +e relative sea leYe!
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Flood insurance maps do not income current or prospective coastal propel owners of erosion risks (Heinz Center, 20003. The Roundtable theme of sea level rise and coastal disasters was well illustrated by the impact of Hu~c~ne Hugo in the Charleston, South Carolina area on September 22, 1989.
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However, recent schemes in Bangladesh to reclaim low lying land wa dikes could starve these low lying lands of sediment nourishment and cause this area to have similar problems as previously documented in Venice. SEA LEVEL RISE AND COASTAL HAZARDS: ON A COLLISION COURSE WITH DISASTER The slow creeping up of the sea, coupled with land subsidence and erosion has made some areas of the world especially vulnerable to natural disasters though not all coastal zones are equally vulnerable.
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The intensification of the global hydrologic cycle will likely lead to higher average annual precipitation, more intense hurricanes, higher wave and storm surge, and more frequent heavy rainfall events. New Orleans' defenses against sea level rise and coastal disasters consist of a levee and flood control system designed to absorb a category III hurricane's storm surge (winds 111-1~0 mph/sto~ surge 9-1~ Get above normal)
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Normally closures would last about 4-6 hours. Closures are predicted to remam relatively Frequent for sea level rise of 20cm (~7.87 inched, however, the higher the sea level nse, He more often the barner gates will have to be closed.
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Beaches exhibit natural profiles and these profiles are knocked out of equilibrium by rising sea level. POLITICS AND SEA LEVEL RISE Coastal towns, such as Ocean City, Maryland attract millions of visitors each year to enjoy the natural amenities of Me area.
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Part of the mission of the Corps is to help prevent coastal damage produced by storms, to control erosion, to restore natural environments along coasts and rivers, to provide emergency response, and to conduct research on sea level rise. For the Corps of Engineers, sea level rise is a second-order influence.
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She stated that coastal zone risk maps would be a helpfi~1 tool in selling sea level rise mitigation to coastal communities. Cornelia Pasche Wikar of Me State of Maryland discussed Chesapeake Bay 2000, wetland preservation, and Maryland coastal hazard mitigation initiatives.
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One point was dear, if we could prevent sea level rise, large amounts of money would be saved in rebuilding our beaches. The three case studies in He afternoon, New Orleans, the Outer Banks of North Carolina, Ed Venice, brought the issues home very forcefully.
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