Study of Precipitation Factor Inducing Debris Flow on Slope--A Case Study of Beibei, Chongqing

LIU Cheng; XU Gang; HUANG Yian; KONG Yuan-yuan; CHENG Zhong-ling; YANG Juan

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Study of Precipitation Factor Inducing Debris Flow on Slope--A Case Study of Beibei, Chongqing

- Study of Precipitation Factor Inducing Debris Flow on Slope--A Case Study of Beibei, Chongqing
- Bulletin of Soiland Water Conservation Vol. 26, Issue 1, Pages: 51-54(2007)
- 作者机构：
  
  西南师范大学资源环境学院三峡库区生态环境教育部重点实验室,重庆,400715
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2007
- 稿件说明：
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LIU Cheng, XU Gang, HUANG Yian, et al. Study of Precipitation Factor Inducing Debris Flow on Slope--A Case Study of Beibei, Chongqing[J]. Bulletin of Soiland Water Conservation, 2007, 26(1): 51-54.
DOI：

LIU Cheng, XU Gang, HUANG Yian, et al. Study of Precipitation Factor Inducing Debris Flow on Slope--A Case Study of Beibei, Chongqing[J]. Bulletin of Soiland Water Conservation, 2007, 26(1): 51-54. DOI：

摘要

从重庆市北碚区坡面泥石流形成的地质、地貌和气象条件入手

分析了北碚区1962-2003年发生的坡面泥石流数据及降雨资料

认为在该区域

降水是发生坡面泥石流的决定性因素

坡面泥石流的发生与前期降雨量和1 h雨强关系密切

前期降雨对泥石流形成的贡献比较大

1 h雨强主要起到激发作用。通过对泥石流的降雨指数分析

认为在该区当1 h降雨量达到40 mm

降雨指数达到160

综合指数达到650

就可能发生坡面泥石流。

Abstract

The effects of precipitation on debris flows on slope in Beibei District

Chongqing City

were investigated after the study of the formation conditions and their relations with the geologic

geographical and climatic conditions.The data for debris flows and precipitation during 1962-2003 were analyzed with a case of debris flows studied specifically.The analyses indicate that precipitation is the critical factor which causes the occurrence of debris flows on slope in Beibei District.The occurrence of debris flows is found to have a close relation with antecedent precipitation and one hour rainfall intensity.It is followed from the analysis of indexes that a debris flow may occur in Beibei District as the amount of one hour rainfall reaches 40 mm

the rainfall index

160

and the comprehensive index

650.

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