Development of a region-partitioning method for debris flow susceptibility mapping

摘要: Debris flow susceptibility mapping (DFSM) has been reported in many studies, however, the irrational use of same conditioning factor system for DFSM regional-scale not thoroughly resolved. In this paper, a region-partitioning method that is based on topographic characteristics watershed units was developed with objective establishing multiple systems DFSM. First, were selected as and created throughout entire research area. Four topographical factors, namely, elevation, slope, aspect relative height difference, basis clustering units. The k-means analysis used to cluster according their partition study area into several parts. Then, information gain ratio filter out superfluous factors establish each region subsequent debris modeling. Last, map whole acquired by merging maps from all Yongji County Jilin Province, China case study, analytical hierarchy process conduct comparative evaluate performance method. under curve (AUC) values showed partitioning two parts improved prediction rate 0.812 0.916. results demonstrate can realize more reasonable Hence, be guide mitigate imminent risk.