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[1]TIAN Shu-jun,KONG Ji-ming.Study on Rainfall Threshold of Geo-hazard after Wenchuan Earthquakde Based on Regional Rainfall Map—Take Qingping Town, Mianzhu County as Example[J].Research of Soil and Water Conservation,2013,20(05):237-240.

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Study on Rainfall Threshold of Geo-hazard after Wenchuan Earthquakde Based on Regional Rainfall Map—Take Qingping Town, Mianzhu County as Example

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 05 Page number: 237-240 Column: Public date: 2013-10-28

Title:: Study on Rainfall Threshold of Geo-hazard after Wenchuan Earthquakde Based on Regional Rainfall Map—Take Qingping Town, Mianzhu County as Example

Author(s):: TIAN Shu-jun¹, KONG Ji-ming²; 1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China;
2. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences and Ministry of Water Resources, Chengdu 610041, China

Keywords:: rainfall threshold; geo-hazard; regional rainfall map; small watershed; Wenchuan earthquake

CLC:: P315.9

DOI:: -

Abstract:: Based on rainfall data of 19 meteorological stations around study area, regional rainfall map of August 13 to 14, 2010 was obtained in the way of spatial interpolation. This paper divided the study area into 138 small watersheds. According to analysis and statistics the rainfall of small watershed where 23 geo-hazards were triggered by the rainfall of August 13 to 14, 2010, the study on rainfall threshold of geo-hazard after Wenchuan earthquakde was carried out. The result shows that 81.7mm of rainfall is the threshold of mass geo-hazards occurrence in study area after Wenchuan earthquake, which is 59.15% lower than before the earthquake, and the actual reduction in amplitude may be greater than that. Compared to using rainfall of a single meteorological station, the regional distribution of rainfall is more objective to study the rainfall threshold of geo-hazards. The research method used in this paper is referential significance to enrich and improve the study of rainfall threshold of geo-hazards.

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