Debris dispersal modeling for the great Sumatra Tsunamis on Banda Aceh and surrounding waters |
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| Authors: | Gegar Prasetya Kerry Black Willem de Lange Jose Borrero and Terry Healy |
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| Institution: | (1) Department of Earth and Ocean Sciences, University of Waikato, Hamilton, New Zealand;(2) Heaven on the Planet, Lombok, Indonesia;(3) ASR Ltd, Marine Consulting and Research, Raglan, New Zealand;(4) Present address: GNS Science, 1 Fairway Dr., Lower Hutt, New Zealand |
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| Abstract: | The Great Sumatra Tsunami on 26 December 2004 generated large amounts of debris and waste throughout the affected coastal
region in the Indian Ocean. In Banda Aceh—Indonesia, the tsunami flows were observed carrying a thick muddy sludge that mixed
with all kinds of debris from the destroyed buildings, bridges and culverts, vehicles, fallen trees, and other flotsam. This
waste and debris was mostly deposited inland, but traveled both onshore and offshore. Numerical dispersal modeling is carried
out to simulate the transport of debris and waste produced by the tsunamis during the event. The model solves the Lagrangian
form of the transport/dispersion equations using novel particle tracking techniques. Model results show that understanding
the pathway and distribution of the suspended materials and flotsam caused by tsunamis is important for a proper hazards mitigation
plan and waste management action, and to minimize serious long-term adverse environmental and natural resources consequences. |
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