J4 ›› 2011, Vol. 41 ›› Issue (5): 1481-1487.

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Rainfall Thresholds for Regional Landslides

 ZHAO Heng, SONG Er-xiang   

  1. Department of Civil Engineering, Tsinghua University, Beijing100084, China
  • Received:2010-12-26 Online:2011-09-26 Published:2011-09-26

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Abstract:

Based on a certain regional division of China, rainfall thresholds for regional landslides in different areas were collected. The distribution of thresholds of forecasted 24 h rainfall show that they are highly correlated to climate and are approximately 0.04-0.08 times of mean annual precipitation (MAP). A review of domestic researches showed that the influence of heavy rainfall in short term couldn’t be reflected from current rainfall thresholds which were often obtained without enough argumentation. A rainfall intensity-duration threshold I=4.0D-0.51 was obtained for the west area of Hubei Province with a method advised for defining the start point of rainfall duration.

Key words: regional landslides, rainfall threshold, intensity-duration curve, mean annual precipitation

CLC Number: 

  • P642.22
[1] HE Yu-qiong, XU Ze-min, WANG Zhi-qi, ZHANG Yong. Application of Landslide Rainfall Threshold Model [J]. J4, 2012, 42(4): 1112-1118.
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