Respective influence of vertical mountain differentiation on debris flow occurrence in the Upper Min River, China.

Scientific Reports
Mingtao DingGuohui Yang

Abstract

The generation, formation, and development of debris flow are closely related to the vertical climate, vegetation, soil, lithology and topography of the mountain area. Taking in the upper reaches of Min River (the Upper Min River) as the study area, combined with GIS and RS technology, the Geo-detector (GEO) method was used to quantitatively analyze the respective influence of 9 factors on debris flow occurrence. We identify from a list of 5 variables that explain 53.92%% of the total variance. Maximum daily rainfall and slope are recognized as the primary driver (39.56%) of the spatiotemporal variability of debris flow activity. Interaction detector indicates that the interaction between the vertical differentiation factors of the mountainous areas in the study area is nonlinear enhancement. Risk detector shows that the debris flow accumulation area and propagation area in the Upper Min River are mainly distributed in the arid valleys of subtropical and warm temperate zones. The study results of this paper will enrich the scientific basis of prevention and reduction of debris flow hazards.

References

Jun 1, 1950·Biometrika·P A P MORAN
Feb 13, 2008·Proceedings of the National Academy of Sciences of the United States of America·Susan L Cutter, Christina Finch
Jun 27, 2015·Journal of Evidence-based Medicine·Xing-Li Wan, Xian-Qiong Feng

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Software Mentioned

ArcMap
GEO
ArcGIS
Google Earth
SatScan
ArcGIS10

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