Assessment of Debris Flow Risk Factors Based on Meta-Analysis—Cases Study of Northwest and Southwest China

Yuzheng Wang, Lei Nie, Min Zhang, Hong Wang, Yan Xu and Tianyu Zuo
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Yuzheng Wang: College of Construction Engineering, Jilin University, Changchun 130026, China
Lei Nie: College of Construction Engineering, Jilin University, Changchun 130026, China
Min Zhang: College of Construction Engineering, Jilin University, Changchun 130026, China
Hong Wang: College of Construction Engineering, Jilin University, Changchun 130026, China
Yan Xu: College of Construction Engineering, Jilin University, Changchun 130026, China
Tianyu Zuo: College of Construction Engineering, Jilin University, Changchun 130026, China

Sustainability, 2020, vol. 12, issue 17, 1-24

Abstract: Debris flow is a type of special torrent containing numerous solid materials. With many types of factors affecting debris flow, there is no reliable basis for the selection of risk factors for debris flow risk assessment. Therefore, to study the factors affecting debris flow, exploring a reliable method for assessing the relative importance of these factors is a significant endeavor in debris flow prevention and control work. In this research, debris flow risk assessment was combined with meta-analysis to analyze quantitatively the relative importance of risk factors of debris flow in northwest and southwest China. The final relative importance of each factor in northwest China is as follows, maximum relative height difference > slope of main channel > maximum daily precipitation > ratio of longitudinal slope > drainage area > length of main channel. In addition, in southwest China, maximum relative height difference > maximum daily precipitation > slope of main channel > ratio of longitudinal slope > length of main channel > drainage area. The meta-analysis results were accurate, which can provide a reliable basis for the selection of debris flow risk factors in debris flow risk assessment. Furthermore, it provides strong support for the application of meta-analysis in risk assessment of other geological hazards.

Keywords: debris flow; risk factors; relative importance; meta-analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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