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Wetland Loss in World Deltas

2008; Coastal Education and Research Foundation; Volume: 1; Linguagem: Inglês

10.2112/05-0607.1

1551-5036

James M. Coleman, Oscar K. Huh, DeWitt Braud,

Geology and Paleoclimatology Research

Geologic and geomorphic data on 42 world deltas were compiled for a NASA-sponsored research project. Satellite images from 14 of these deltas (Danube, Ganges, Brahmaputra, Indus, Mahanadi, Mangoky, McKenzie, Mississippi, Niger, Nile, Shatt el Arab, Volga, Huang He [Yellow], Yukon, and Zambezi) were analyzed for delta plain wetland loss caused by natural causes and conversion of wetlands for agricultural and industrial use. These analyses indicated that a total of 15,845 km2 of wetlands have been irreversibly lost during the past 14 years and the average rate of loss is 95 km2/y. If a similar trend is present in the other deltas, a total wetland loss in the delta plains of the 42 deltas would be on the order 364,000 km2 over the past 15 to 20 years.