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Endurance of the <i>Casuarina</i> coastal forest in southern Sri Lanka against the Indian Ocean tsunami
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- Hayashida Mitsuhiro
- Faculty of Agriculture, Yamagata University
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- Sakamoto Tomoki
- Forestry and Forest Products Research Institute
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- Okada Minoru
- Department of Agriculture and Environment, Hokkaido College, Senshu University
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- Inoue Shoji
- Faculty of Agriculture, University of the Ryukyus
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- Yanagihara Atsushi
- Faculty of Agriculture, Yamagata University
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- Akojima Isao
- Faculty of Literature and Social Sciences, Yamagata University
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- Nakashima Yuhki
- Faculty of Agriculture, Yamagata University
Bibliographic Information
- Other Title
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- Endurance of the Casuarina coastal forest in southern Sri Lanka against the Indian Ocean tsunami
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Description
In Hambantota, southern Sri Lanka, we implemented a survey of the damage-mitigating effect and the endurance of the Casuarina coastal forest against the Indian Ocean tsunami that occurred in December 2004. The tsunami struck by passing over the Casuarina forest on the front dune (height of 5.5 m above sea level), but it was unable to pass over the next dune (height of 5 m); therefore, private houses on the inland side of that dune were not damaged. In contrast, in the shallow trough produced by excavation of part of the dune, the tsunami passed over the front dune (height of 3.5 m) and through the Casuarina forest; it destroyed private houses 250m from the shoreline. Although the Casuarina trees growing on the high dune were not damaged, 57% of the Casuarina trees that were directly hit by the tsunami on the trough withered after it passed. However, few tree trunks were broken during the tsunami, so it was suggested that the Casuarina forests had been able to withstand the physical impact of the tsunami.
Journal
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- Journal of the Japanese Society of Coastal Forest
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Journal of the Japanese Society of Coastal Forest 7 (3), 1-5, 2009-02-25
Japanese Society of Coastal Forest