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ファイル
言語
日本語
著者
Pimiento Edgar
横田 修一郎
内容記述(抄録等)
Small and shallow slope failures frequently occur in mountainous areas worldwide, due to intense rainfall. Regional hazard assessment on the occurrences of failures is thus an important subject, especially for developing countries. One method of assessing such hazard is based on statistical analysis of spatial distribution of past failures. As a case study for hazard assessment, we constructed detailed maps expressing the distribution of slope failures which occurred during the 1983 San'in heavy rainfall disaster in western Shimane, southwest Japan. Although similar maps have been already presented, they did not identify the source areas of failures alone, as they also included the deposit areas of slope failures and debris flows. For this study, we identified only the source areas of slope failures, using 1:8,000-scale aerial photographs that were taken just after the disaster. More than 2,300 failures were mapped in the study area. Based on the distribution of slope failures, we confirmed that they tend to appear in the steeper slopes. The average area of surface of rupture was about 1,400 m^2, and individual extent was greater in granitic rocks than in volcanic and schistose lithologies, as suggested by previous reports.
掲載誌名
島根大学地球資源環境学研究報告
25
開始ページ
25
終了ページ
30
ISSN
13439774
発行日
2006-12-27
NCID
AA11455176
出版者
島根大学総合理工学部地球資源環境学教室
出版者別表記
Department of Geoscience, Interdisciplinary Faculty of Science and Engineering, Shimane University
資料タイプ
紀要論文
部局
(旧組織)大学院総合理工学研究科
備考
12-14,16+ / 1993+
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