著者

佐々木 寧 田中 規夫 湯谷 賢太郎 ホモチュエン サマン

出版者

埼玉大学工学部

雑誌

埼玉大学紀要. 工学部 第1編 第1部 論文集 = The Science and Engineering Reports of Saitama University (ISSN:18804446)

巻号頁・発行日

no.38, pp.49-57, 2005

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This study reports the damage at the coastal area in south Thailand by Indian Ocean Tsunami occurred at Dec.26.2004. The investigated area covered about 250 km at Andaman seaside from Phuket to Ranong. For elucidating the effect of vegetation on tsunami protection, the representative vegetation was classified according to the stand structure of the tree. The representative trees were classified into five and their stem diameter (d), tree height, branch structure, density of the trees and the forest-width to the Tsunami-direction were investigated. From the survey, mangrove, especially Rhizophora apiculata forest, was effective to protect Tsunami damage with its complex root structure. Anacardium occidentale was also effective with its large diameter branches at low height from the ground level. On contrary, Casuarina equisetifolia has assumed little effect to reduce the velocity when their diameter grow large (d>0.5m) with large stem-spacing (7-30m).