The Use of a Weight of Evidence Approach to Determine the Potential for the Occurrence of Debris-Flow in the Gaoping River Basin

Chiu Yen He, Chyan Deng Jan, Ssu Yao Yang

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

This study uses the weight of evidence method (WEM) to determine the relationship between the physiographical factors and the occurrence of debris flow, in order to determine the potential for the occurrence of debris flow. The chances and their ratios are used in a WEM to determine the weighting factors for 12 physiographical factors that relate to the occurrence of debris flow. The linear sum of 12 weighting factors forms an integrated physiographical susceptibility index (SI). The higher the value of the SI for a watershed, the greater is the potential for debris flow. Debris flow events that occurred in the Gaoping River Basin (GRB) from 2005 to 2012 are studied using WEM in this study. The SI-values for debris-flow-stream watersheds are calculated and ranked to produce successive rate curves. The area under the successive rate curves (AUC) in GRB is then calculated for 8 severe rainfall events during this period. The result shows that the values for the AUC are between 0.7 and 0.9, so WEM and the proposed-SI accurately predict the potential for the occurrence of debris flow.

原文English
頁(從 - 到)92-100
頁數9
期刊Journal of Chinese Soil and Water Conservation
48
發行號2
出版狀態Published - 2017 六月 1

All Science Journal Classification (ASJC) codes

  • 水科學與技術
  • 岩土工程與工程地質
  • 土壤科學
  • 地表過程

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