In order to verify the feasibility and accuracy of the evaluation model of landslide susceptibility based on MaxEnt and slope unit,taking Menglian County of Yunnan Province as an example,nine evaluation factors of elevation,slope,aspect,distance from fault,distance from highway,distance from river,precipitation,engineering geological rock group and normalized difference vegetation index (NDVI )were selected.Based on the MaxEnt model,the susceptibility of 800 slope units was evaluated,and the evaluation results were compared with the evaluation results based on grid unit.The results show that:(1 )The extremely low susceptibility area of landslide disaster in Menglian County accounts for 37.44％;low-prone areas accounted for 29.08％;medium-prone areas accounted for 17.67％;high-prone areas accounted for 11.26％;the extremely high-prone areas accounted for 4.54％.(2)According to the factor contribution rate,the evaluation results based on slope unit and grid unit have certain similarity,which shows that human engineering activities and geological structure are the main causes of landslide disaster in Menglian County.(3 )The AUC values of the evaluation results based on the slope unit and the grid unit are 0.858 and 0.872,respectively.The calculation results of the z statistic show that the accuracy of the two results is the same,but the slope unit is more in line with the practical significance of the actual survey.It is proved that the evaluation model of landslide hazard susceptibility based on MaxEnt model and slope unit has good feasibility and accuracy.
关键词
MaxEnt/斜坡单元/崩滑灾害/易发性评价/孟连县
Key words
MaxEnt/slope unit/landslide disaster/susceptibility evaluation/Menglian County
万方数据