Other
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3323612k&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 23, CiteID L23612
Other
3
Biogeosciences: Modeling, Oceanography: General: Coral Reef Systems (4916), Oceanography: Physical: Surface Waves And Tides (1222), Oceanography: Physical: Tsunamis And Storm Surges
Scientific paper
Significant buffering of the impact of tsunamis by coral reefs is suggested by limited observations and some anecdotal reports, particularly following the 2004 Indian Ocean tsunami. Here we simulate tsunami run-up on idealized topographies in one and two dimensions using a nonlinear shallow water model and show that a sufficiently wide barrier reef within a meter or two of the surface reduces run-up on land on the order of 50%. We studied topographies representative of volcanic islands (islands with no continental shelf) but our conclusions may pertain to other topographies. Effectiveness depends on the amplitude and wavelength of the incident tsunami, as well as the geometry and health of the reef and the offshore distance of the reef. Reducing the threat to reefs from anthropogenic nutrients, sedimentation, fishing practices, channel-building, and global warming would help to protect some islands against tsunamis.
Hallberg Robert W.
Kunkel Catherine M.
Oppenheimer Michael
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