中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2011, Vol. 30 ›› Issue (1): 95-101.

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成都市灾害性山洪泥石流临界降雨量特征

胡桂胜1,2,3,陈宁生1,2,杨成林1,2,3   

  1. 1.中国科学院 水利部成都山地灾害与环境研究所,四川 成都 610041; 2.中国科学院 山地灾害与地表过程重点实验室,四川 成都 610041; 3.中国科学院研究生院,北京 100049
  • 收稿日期:2010-11-30 修回日期:2010-12-16 出版日期:2011-02-15 发布日期:2015-01-22
  • 作者简介:胡桂胜( 1984—) ,男,江西九江人,博士研究生,主要从事山地灾害与工程研究。E-mail: hgsjjx@163.com。
  • 基金资助:
    中国科学院知识创新工程项目( KZCX2-YW-332)

Critical Rainfall Characteristics for Torrents and Debris Flows in Chengdu

HU Gui-sheng1,2,3,CHEN Ning-sheng1,2,YANG Cheng-lin1,2,3   

  1. 1. Institute of Mountain Hazards & Environment,CAS,Chengdu 610041,Sichuan,China; 2. Key Laboratory of Mountain Hazards & Surface Process,CAS,Chengdu 610041,Sichuan,China; 3. Graduated School of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2010-11-30 Revised:2010-12-16 Online:2011-02-15 Published:2015-01-22

摘要: 在统计四川省地震灾区106 个县建国以来的山洪和泥石流灾害时间和相应的1 h 和24 h 雨量值基础上,得 出四川省地震灾区山洪泥石流的临界雨量在不同的区域表现出不同的特征。其中1 h 临界降雨变化于5 ~ 120 mm,与山洪泥石流暴发关系最为密切; 24 h 临界降雨主要变化于35 ~ 235 mm,对山洪泥石流的暴发有极大的影响。 在此基础上重点研究成都市灾害性山洪泥石流临界降雨量特征,并给出成都地震灾区山洪泥石流应急预警的降雨 指标,具有重要的减灾价值。最后,根据临界降雨量特征进行了成都市山洪泥石流防治区划分。

关键词: 泥石流, 山洪, 成都市, 地震灾区, 临界雨量

Abstract: Critical rainfall assessment is a very important tool for hazard management of torrents and debris flows in mountainous areas. The complexity of outbreak of torrents and debris flows is depended on critical rainfall. There is an urgent need to quantify the critical rainfall distribution in the area so that better hazard management could be planned and if real time rainfall forecast is available,and torrent and debris flow early-warning could be issued in advance. This study is based on 49-year observations ( 1954 ~ 2003) of up to 678 torrent and debris flow events. Generally,the contour maps from 1 hour and 24 hours have similar patterns. Three zones with low,medium and high critical rainfalls have been identified. The value of the 1 hour critical rainfall varies from 5 ~ 120mm,which is most closely with the outbreak of torrents and debris flows. The value of the 24 hour critical rainfall varies from 35 ~ 235mm,which is very important to the outbreak of torrents and debris flows. On this basis,it focuses on the critical rainfall torrents and debris flows in Chengdu. Finally,it classifies regions of torrents and debris flows in Chengdu based on critical rainfall characteristics of Chengdu.

Key words: debris flow, mountain torrent, Chengdu, earthquake-stricken area, critical rainfall

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