长江科学院院报 ›› 2017, Vol. 34 ›› Issue (1): 54-60.DOI: 10.11988/ckyyb.20150956

• 防洪减灾 • 上一篇    下一篇

岷江上游汶川地震重灾区山洪灾害危险分区研究

王钧1,2, 宇岩3, 欧国强4, 潘华利4, 乔成4   

  1. 1.广州地理研究所,广州 510070;
    2.广东省地理空间信息技术与应用公共实验室,广州 510070;
    3.湛江市经济开发区住房和规划建设局,广东 湛江 524000;
    4.中国科学院 水利部成都山地灾害与环境研究所,成都 610041
  • 收稿日期:2015-11-09 出版日期:2017-01-01 发布日期:2017-01-13
  • 作者简介:王 钧(1988-),男,甘肃会宁人,助理研究员,博士,主要从事山地灾害风险评估方面的研究,(电话)18802039785(电子信箱)wangjun210@mails.ucas.ac.cn。
  • 基金资助:
    国家自然科学基金面上项目(41372331);科技部国际合作项目(2013DFA21720);广东省水利厅科技创新项目(2016-15, 2011-19)

Flash Flood Risk Zoning of Areas Hit by Wenchuan Earthquake in the Upper Reach of Minjiang River

WANG Jun1,2, YU Yan3, OU Guo-qiang4, PAN Hua-li4, QIAO Cheng4   

  1. 1.Guangzhou Institute of Geography, Guangzhou 510070, China;
    2.Open Laboratory of Geospatial Information Technology and Application of Guangdong Province, Guangzhou 510070, China;
    3.Bureau of Housing and Urban Construction of Zhanjiang City, Zhanjiang 524000, China;
    4. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
  • Received:2015-11-09 Online:2017-01-01 Published:2017-01-13

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摘要： 以岷江上游汶川地震重灾区为靶区,在剖析山洪灾害特征及驱动因子的基础上,开展山洪灾害危险性分区研究。得出研究区山洪灾害具有如下特征:①受暴雨控制,主要分布在龙门山暴雨区,具带状、群发特征;②受地震发震断层的控制,在主断层范围内集中、连片分布;③呈串联或并联特征;④震后崩塌、滑坡淤堵河道,山洪灾害发生的临界雨量降低,导致山洪灾害规模扩大、频率增加,危害加剧。根据主控驱动因子即暴雨驱动因子(年最大1 h暴雨均值)和地震驱动因子(距发震断层距离),将研究区山洪灾害分为3个等级:高度危险区、中度危险区和低度危险区。研究成果可为岷江上游流域山洪灾害的监测预警、综合防治、减少山洪灾害损失等提供依据。

关键词: 汶川地震, 岷江上游, 山洪灾害, 分布特征, 危险性分区

Abstract: With the Wenchuan earthquake-hit area in the upper reach of Minjiang River as the study area, the characteristics of flash flood disaster distribution and driving factors were analyzed first, and on this basis, the flash flood risk zoning was obtained. Results revealed that the flash flood disaster has the following characteristics: (1) dominated by heavy rainfall, the flash floods mainly distributed in the rainstorm areas of Longmen mountain with banding and group-occurring features; (2) the flash floods concentrated continuously in the scope of main earthquake faults; (3) the flash floods distributed in series or parallel characteristics; (4) the blockage of river channel was serious because of collapses and landslides induced by the earthquake, and the critical precipitation of flash flood disasters decreased, resulting in the increase of scale and frequency of flash flood disasters and the exacerbation of the disaster. According to the rainstorm driving factor (the mean annual maximum precipitation in 1 hour) and earthquake driving factor (distance from the earthquake fault), the areas hit by flash flood disaster in the upper streams of Minjiang River can be divided into three zones: high risk area, moderate risk area and low risk area. The research results provide technical support for the monitoring and early warning of flash flood disasters, proposing targeted flash flood disaster prevention system and reducing the loss of flash flood in mountain areas.

Key words: Wenchuan earthquake, upper reach of Minjiang River, flash flood, distribution characteristics, risk zoning

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