地质灾害综合危险性指数法在花都区地质灾害易发区划分中的应用
Application of the synthetic hazard index method for geological hazards in the classification of geological hazard susceptibility areas in Huadu District
李玲1
作者信息
- 1. 广东省核工业地质调查院,广东 广州 510800
- 折叠
摘要
本文依据地质灾害易发程度对广州市花都区进行合理区划,并对地质灾害易发分区进行评价,从而为花都区地质灾害的预防和治理提供科学依据.运用综合危险性指数法将花都区划分为高易发区 4 个、中易发区 5 个、低易发区 2 个,分析地质灾害易发区内各类灾害体占比情况及诱发因素,对地质灾害易发区进行综合评价.花都区已发地质灾害以滑坡、崩塌为主,地面塌陷次之;地质灾害低易发区占全区面积最大,中易发区次之,高易发区面积最小;低易发区地质灾害发育地面塌陷和崩塌,以居民削坡建房、强降雨及岩溶发育为主导诱发因素,中易发区地质灾害发育滑坡和崩塌,以人工削坡、矿山开采和强降雨为主导诱发因素,高易发区灾害类型为崩塌和滑坡,诱发因素为人工削坡、强降雨.
Abstract
Based on the degree of susceptibility to geological hazards,a reasonable zoning of Huadu District in Guangzhou City is carried out,and the zoning of susceptibility of geological hazards is evaluated to provide a scientific basis for the prevention and control of geological hazards in Huadu District.Huadu District is divided into 4 high susceptibility areas,5 medium susceptibility areas and 2 low susceptibility areas by using the comprehensive risk index method,and the proportion and triggering factors of various types of hazards in the prone areas of geological hazards are analyzed,so as to carry out a comprehensive evaluation of the prone areas of geological hazards.The geological hazards that have occurred in Huadu District are mainly landslides and collapses,followed by ground subsidences;the low susceptibility areas of geological hazards account for the largest area in the whole district,followed by the medium susceptibility areas,and the high susceptibility areas are the smallest.Ground subsidences and collapses are developed in low susceptibility areas of geological hazards,with cutting of slopes by residents to building houses,heavy rainfall,and karst development as the main triggering factors;landslides and collapses are developed in medium susceptibility areas of geological hazards,with artificial slope cutting,mining,and heavy rainfall as the main triggering factors;the types of hazards in high susceptibility areas are collapses and landslides,with artificial slope cutting and heavy rainfall as the triggering factors.
关键词
地质灾害/综合危险性指数法/地质灾害易发区/广州市花都区Key words
geologic hazard/synthetic hazard index method/geological hazard susceptibility areas/Huadu District,Guangzhou City引用本文复制引用
出版年
2024
NETL
NSTL
万方数据