書誌事項
- タイトル別名
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- A Topographical Study on Forecasting Failures Spots on the Shirasu Slope
- シラス シャメン ニ オケル ホウカイ ハッセイ イチ ノ チケイガクテキ ケ
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抄録
On the Shirasu slope, most parts of slope failures caused by rainstorms have often occurred near knick lines. On the slope with some knick lines, tha failures sometimes occur at several elevations.<br>On the Shirasu plateau, there exist the paleovalley which characterized by no waters. Paleovalley has some knick points and these knick points continue downstream to the knick lines on the Shirasu slope. Paying attention to the topographical features such as a knick point, we examined the possibility of forecasting the slope failure sites.<br>We regarded a headward of valley as the circle which inscribed around the ridge lines on the topographical map, and we get the average inclination within the circle and the radius. Measured by this method on varied scales of valley, collapsed and not collapsed slopes could be discriminated by the approximate formula “i=2.39r-0.50” (i; average inclination, r; radius). Under the same method above we also defined the efficient hight “He=h2/2r” (h; relative height, r; radius) as a meaningful values of topography, and calculated “He” of every slope. Using these formulas of the research on the case of Kagoshima disaster in 1993, we clarified that most collapsed slopes have efficient height above 11.4 (m).
収録刊行物
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- 砂防学会誌
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砂防学会誌 50 (3), 28-34, 1997
Japan Society of Erosion Control Engineering
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詳細情報 詳細情報について
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- CRID
- 1390282679042720128
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- NII論文ID
- 130004295803
- 10016080225
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- NII書誌ID
- AN0012035X
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- NDL書誌ID
- 4305313
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- ISSN
- 02868385
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可