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四川省泥石流灾害的时空分布规律和降水特征
Alternative TitleSpatial-temporal Distribution of Debris Flows in Sichuan Province in China and the Corresponding Rainfall Characteristics
杨红娟1,2; 韦方强2; 马振峰3; 江玉红3
Corresponding Author杨红娟
2017-10
Source Publication灾害学
ISSN1000-811X
Volume32Issue:4Pages:102-107
Other Abstract

四川省是我国泥石流灾害最严重的省份之一,掌握其灾害分布规律是有效开展灾害防治的基础。为此,根据1990-2007年四川省619起泥石流灾害数据和152个气象站的降水资料,统计分析了泥石流灾害的时空分布规律和降水特征。结果显示四川省泥石流灾害空间覆盖范围广,泥石流高发区主要分布在安宁河断裂带和龙门山断裂带周围;灾害主要发生在6-8月,其年际分布和年内分布均与暴雨雨量显著相关,且具有夜发性特点;大部分灾害发生时所在县级行政单元气象站所测雨量未达到大雨水平,群发性泥石流发生的当日雨量大于非群发性泥石流。此外,提出了现有雨量站网布设密度不能满足泥石流预报需求的问题。 
 

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Sichuan Province is one of the regions in China where debris flow hazards are significantly serious. In this study,619 debris flow events which occurred during 1990 -2007 in this region were employed to analyze the spatial and temporal distribution of debris flows. It suggests that more than half of the counties have been threatened by
debris flows,with counties of high debris-flow incidence generally located along the Longmenshan fault or Anninghe fault. In addition,torrential rain plays an important role in the temporal distribution of debris flows,and most debris flows occurred between June and August,with the incidence during the nighttime higher than that during the daytime. Furthermore,precipitation data measured by 152 meteorological stations were utilized to investigate the characteristics of rainfalls that triggered these debris flows. It indicates that debris-flow triggering rainfalls are below 25 mm/day in most cases,and rainfalls that triggered a group of debris flow events are generally greater than those which triggered a single debris flow event. Moreover,this study reveals that the present rain gauge network is too sparse for debris flow forecast.

Keyword泥石流 分布规律 降水特征 四川
Subject AreaP642.23
DOI10.3969/j.issn.1000-811X.2017.04.018
Indexed ByCSCD
Language中文
CSCD IDCSCD:6082839
Funding Organization四川省科技计划项目(2015SZ0214) ; 国家自然科学基金项目(41671013)
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/20710
Collection山地灾害与地表过程重点实验室
Affiliation1.中国科学院山地灾害与地表过程重点实验室
2.中国科学院.水利部成都山地灾害与环境研究所
3.四川省气候中心
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
杨红娟,韦方强,马振峰,等. 四川省泥石流灾害的时空分布规律和降水特征[J]. 灾害学,2017,32(4):102-107.
APA 杨红娟,韦方强,马振峰,&江玉红.(2017).四川省泥石流灾害的时空分布规律和降水特征.灾害学,32(4),102-107.
MLA 杨红娟,et al."四川省泥石流灾害的时空分布规律和降水特征".灾害学 32.4(2017):102-107.
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