水土保持通报2016，Vol.36Issue(6)：73-77,5.DOI:10.13961/j.cnki.stbctb.2016.06.013
四川省典型区域滑坡泥石流与降水的关系
Relationship Between Landslide/Debris Flow and Rainfall in Typical Region of Sichuan Province
摘要
Abstract
[Objective] We studied the relationship between climatic characteristics of rainfalls and geological disasters in typical regions of Sichuan Province to provide basis for analyzing the relation between climatic variation and geological disasters distribution in Sichuan Province.[Methods] Disaster cases were collected in recent 15 years and the typical regions of landslide and debris flow in Sichuan Province were marked out to analyze the relationship between geological disasters and the climatic characteristics of rainfalls.[Results] Landslides mainly occurred in the east of Sichuan Province,while debris flows mainly occurred in the west of Sichuan Province.The frequencies of the two kinds of disasters increased in recent years.Landslides in typi cal regions were caused by days precipitation,and specifically 15 days effective precipitation was responsible for it.Beside that,heavy rains were ordinarily found in early stage of the collected landslide cases.Debris flows in typical regions were caused by few-day rainfall,and was closely related to 3 days effective precipita tion.Moderate rain and light rain were frequently observed in 3 days effective precipitation before debris flow outbreaks.[Conclusion] 15 days effective precipitation and 3 days effective precipitation were both associated closely to climate characteristics of rainfalls:the former can be the factor for landslide forecast,and the latter can be the factor for debris flow forecast.关键词
滑坡/泥石流/降水/气候特征Key words
landslide/debris flow/rainfall/climatic characteristics分类
资源环境引用本文复制引用
刘海知,马振峰,范广洲..四川省典型区域滑坡泥石流与降水的关系[J].水土保持通报,2016,36(6):73-77,5.基金项目
国家自然科学基金项目“华西秋雨年际变化规律及其形成机理研究”(41275097) （41275097）
四川省科技支撑计划项目(15C0098) （15C0098）
