The relationship between geological hazard characteristics and rainfall in Zhuzhou
Based on the survey data of geological disasters in Zhuzhou City from 2011 to 2021,the characteristics of geological disasters in Zhuzhou City are analyzed statistically,and the relationship between the characteristics of geological disasters and rainfall in Zhuzhou City is analyzed by taking an example of an extreme rainfall process that occurred in Zhuzhou City,Hunan Province,from 6-14 July 2019 as an example.The results show that:(1)the geological disasters in Zhuzhou City are characterized by a wide range of points,small scale and strong sudden occurrence.The types of geological disasters are dominated bylandslides,followed by collapses;(2)when the daily rainfall is[50,150)mm,the maximum rainfall intensity is[20,30)mm·h-1,the rainfall in 72 h is[200,300)mm,and the effective rainfall is above 400 mm,the contribution rate to the number of geological disasters is the largest;(3)effective rainfall as the main factor of geological disaster warning is determined as the rainfall threshold for geological hazard classification and warning,which has been tested scientifically and reasonably.It is worth popularizing in practical application.
国家科技期刊平台
NSTL
万方数据
