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《Meteorological Monthly》 2007-09
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The Relationship Between the Landslide and Debris Flows and the Precipitation in Yunnan Province Under Conditions of Different Geology and Geomorphology

Duan Xu1 Tao Yun1,2 Liu Jianyu1 Peng Guifen3(1.Meteorological Institute of Yunnan Province,Kunming 650034;2.Atmospheric Science Department of Yunnan University;3.Meteorological Observatory of Yunnan Province)  
Using day by day precipitation data from May to October during the period of 2001—2005,the landslide and debris flow cases and the grades data of geology and geomorphology feature,the relationship between the landslide and debris flows and precipitation in Yunnan Province under the different geology and physiognomy conditions was investigated.The results indicated that there is close relation between the landslide and debris flows and the preceding cumu-lative precipitation.The most sensitive rainfall conditions are 8-days cumulative precipitation(40~50mm),9-days cumulative precipitation(70~80mm),10-days cumulative precipitation(100~110mm) and 1~2-days cumulative precipitation(30~40mm),etc.Under the conditions of the deficiency of precipitation observation spatial density,it is very important that preceding cumulative precipitation was applied to analyzing the relationship between the landslide and debris flows and the precipitation.Under the conditions of various geology and geomorphology,the landslide and debris flows respond well to precipitation.It is very useful for reducing empty prediction ratio to synthetically considering various geology and geomorphology in the course of prediction.
【Fund】: 中国气象局新技术推广项CMATG2005M39;; 云南省科技攻关及高新技术计划2005SG25
【CateGory Index】: P642.22
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