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      https://www.ias.ac.in/article/fulltext/jess/126/07/0096

    • Keywords

       

      Wenchuan earthquake; Minjiang River; heavy rainfall; post-seismic floods; orographicallyenhanced precipitation.

    • Abstract

       

      By analyzing the multi-year runoff and rainfall data at 15 hydrological stations from 1980 to 2007, as well as monthly runoff data from 1964 to 1984 at the Zipingpu hydrologic station, the relationship between precipitation and runoff has been established and the trend was explored. Based on the catastrophic floods of August 13 and August 18, 2010, characteristics and control factors on the post-seismic floods are summarized. Firstly, the Wenchuan earthquake and rupture zone provides the background for post-seismic floods to develop in the upper Minjiang River, which follows a post-seismic disaster-chain pattern: earthquake collapse to landslide debris flows to floods. Secondly, heavy rainfall controlled by the orographically-enhanced precipitation after the Wenchuan earthquake is the trigger factor for the development of devastating post-seismic floods. Thirdly, the post-seismic floods contain high sediment discharge, cause abrupt and severe damages, and have a large of volume and higher frequency.

    • Author Affiliations

       

      Ding Hairong1 2 Li Yong3 Shao Chongjian3 Lauvence Svirchev4 Xu Qiang1 2 Yan Zhaokun3 Yan Liang3 Ni Shijun1 Shi Zeming1

      1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan Province, China.
      2. College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan Province, China.
      3. National Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Chengdu University of Technology, Chengdu 610059, Sichuan Province, China.
      4. Chengdu University of Technology, Chengdu 610059, Sichuan Province, China.
    • Dates

       
  • Journal of Earth System Science | News

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      Posted on July 25, 2019

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