水文地质工程地质2017，Vol.44Issue(3)：136-142,7.DOI:10.16030/j.cnki.issn.1000-3665.2017.03.20
北京市泥石流易发区降雨预警阈值研究
A study of the rainfall threshold of debris flow forewarning in Beijing based on susceptibility analysis
摘要
Abstract
Reasonable rainfall threshold index is not only related to historical rainfall,but also affected by the regional climate,landform,geological deposition,vegetation,man-made activities and so on.These factors may fall into two categories:rainfall and environmental geological background.The method of definition of rainfall event can be used to calculate rainfall,which includes three aspects:antecedent precipitation,active rainfall and the maximum rainfall in one hour.The methods of RS and GIS are used in the assessment of the susceptibility of debris flows,concerning the slope,rock soil mass types,man-made activities,geological structure,and vegetation,etc.Using rainfall data collected during the occurrence of 82 debris flows from 1949,this paper puts forward a method of the rainfall thresholds obtained for various assessment of the susceptibility of debris flows.The results are used in the Xiqu Gully in Fangshan district of Beijing on July 17,2015,illustrating that this method is reasonable and feasible.This paper analyzes the regional geological environment background and provides a new thread for the debris flow forewarning in mountain areas.关键词
雨量阈值/泥石流/预警/易发性分区/雨场分割Key words
rainfall threshold/debris flow/forewarning/susceptibility of karst collapse/definition of rainfall event分类
天文与地球科学引用本文复制引用
丁桂伶,王翊虹,冒建,姚康,刘欢欢..北京市泥石流易发区降雨预警阈值研究[J].水文地质工程地质,2017,44(3):136-142,7.基金项目
北京市科学技术委员会科技计划项目(Z141100003614052)资助 （Z141100003614052）
北京市突发地质灾害监测预警系统(一期)工程(京发改[2011]1527号)资助 （一期）
