摘要
探究不同栅格分辨率下崩岗易发性评价对崩岗防控具有重要意义.为开展相关研究,以赣州市石城县为例,利用地理探测器选取降雨侵蚀力、可蚀性、岩石种类、植被高度、叶面积指数、高程、坡度、归一化植被指数指标作为评价指标,划分出15、30、60、90、120 m 5种分辨率的栅格单元,以频率比(FR)为联接方法,构建频率比-随机森林(FR-RF)模型开展崩岗易发性评价.结果显示:栅格单元空间分辨率对崩岗易发性评价有一定影响,5种不同栅格分辨率下易发性结果的AUC值依次为0.840、0.830、0.830、0.820、0.810,基于随机森林模型下15 m分辨率栅格单元更适用于研究区的崩岗易发性评价(AUC值为0.840);研究区较高易发区以及高易发区主要分布在北部区域.研究结果可以为赣南地区的崩岗易发性评价提供重要参考.
It is of great significance to explore the susceptibility evaluation of Benggang under different grid unit resolutions for the prevention and control of Benggang.In order to carry out relevant research,Shicheng County of Ganzhou City was taken as an example.Rainfall erosivity,erodibility,rock type,vegetation height,leaf area index,elevation,slope,normalized difference vegetation index were selected as evaluation indexes by using geographical detector.The grid units with five resolutions of 15 m,30 m,60 m,90 m and 120 m were divided.The Random Forest model(FR-RF)was constructed to evaluation of the susceptibility to Benggang by using the frequency ratio(FR)as the linking method.The results show that:the spatial resolution of the grid unit had a certain influence on the susceptibility evaluation of the collapse.The AUC values of the susceptibility results under five different resolutions were 0.840,0.830,0.830,0.820,and 0.810,respectively.The 15 m resolution grid unit based on the random forest model is more suitable for the susceptibility evaluation of the collapse in the study area(with the AUC value of 0.840).The moderate and high susceptible area in the study area are mainly located in the northern region.The results of the study can provide an important reference for the evaluation of the susceptibility to Benggang in Gannan region.
作者
郭飞
张晶鑫
山宏盼
程冬兵
李小伟
夏栋
陈洋
GUO Fei;ZHANG Jingxin;SHAN Hongpan;CHENG Dongbing;LI Xiaowei;XIA Dong;CHEN Yang(Key Laboratory of Geological Hazards in the Three Gorges Reservoir Area,Ministry of Education,Yichang 443002,China;College of Civil Engineering&Architecture,China Three Gorges University,Yichang 443002,China;Changjiang River Scientific Research Institute,Wuhan 430010,China;Central-South Institute of Metallurgical Geology,Yichang 443003,China;College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China;School of Electronic and Information Engineering,Guangzhou Ocean University,Guangzhouc 524088,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2024年第2期63-70,共8页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金项目(42107489)
三峡库区地质灾害教育部重点实验室开放基金(2022KDZ14)
湖北省自然科学基金项目(2022 CFB557)
土木工程防灾减灾湖北省引智创新示范基地(2021EJD026)。
关键词
石城县
崩岗
不同栅格单元分辨率
随机森林模型
易发性评价
Shicheng county
benggang
different grid unit resolution
random forest model
susceptibility evaluatio
