中国地质调查2023，Vol.10Issue(6)：101-110,10.DOI:10.19388/j.zgdzdc.2023.06.12
湖南张家界市永定区地质灾害发育规律及易发性评价研究
Research on the development law and susceptibility evaluation of geological disasters in Yongding District of Zhangjiajie City in Hunan Province
摘要
Abstract
The complex geological structure in Zhangjiajie City has led to its unique landform landscape,mean-whice it has also posed numerous geological hazard risks.By analyzing detailed geological hazard investigation da-ta of Yongding District from 2014 to 2022,the authors in this paper have studied its developmental patterns and susceptibility of geological hazards.The results indicate that landslide is the primary type of geological hazard in the area.Geological hazards are spatially most prevalent in the central fault zone and the northeastern shale forma-tion zone,and they are temporally relatively concentrated during the rainy season in May,June and July.Geolog-ical hazards in this area are closely related to landform characteristics,lithology,and tectonic activities,and they are also influenced by rainfall and human engineering activities.The density of hazard points is highest in the deb-ris hill landform,and the susceptibility of hazard points is highest in Silurian sandy shale formation.Besides,the geological hazards are significantly influenced by tectonics,with hazard points densely concentrated in fold and thrust structures.The high incidence period of hazards is coupled with the rainy season,and the main triggering factor is rainfall.And the unreasonable engineering activities,such as slope cutting for houses and roads construc-tion,exacerbate the occurrence of geological hazards.By using the susceptibility index method and based on Arc-GIS information statistics analysis,the authors in this paper have divided the susceptibility of geological hazards in the entire area into high,moderate,and low susceptibility zones.This study could provide guidance for land spa-tial planning,geological hazard prevention and control,and planning for tourism routes and major engineering construction in Yongding District.关键词
地质灾害/孕灾条件/发育规律/易发性/张家界Key words
geological hazard/disaster pregnancy conditions/development law/susceptibility/Zhangjiajie City分类
天文与地球科学引用本文复制引用
巩书华,李少青,王焕银,王克营,蔡宁波,杜江..湖南张家界市永定区地质灾害发育规律及易发性评价研究[J].中国地质调查,2023,10(6):101-110,10.基金项目
湖南省自然资源厅"湖南省张家界市永定区1∶10 000地质灾害调查和风险评价(编号:湘地调[2022]67)"项目资助. （编号:湘地调[2022]67）
