长江科学院院报 ›› 2019, Vol. 36 ›› Issue (3): 40-45.DOI: 10.11988/ckyyb.20170987

• 防洪减灾 • 上一篇    下一篇

松滋江堤防洪保护区洪水风险研究(Ⅰ)——模型的建立与验证

刘亚, 姚仕明, 朱勇辉, 邹骥   

  1. 长江科学院 水利部江湖治理与防洪重点实验室,武汉 430010
  • 收稿日期:2017-08-25 出版日期:2019-03-01 发布日期:2019-03-20
  • 作者简介:刘 亚(1987-),女,重庆市人,工程师,博士,主要从事水力学及河流动力学研究。E-mail: Newyar@live.cn
  • 基金资助:
    国家自然科学基金项目(51609011,51379018);三峡后续规划课题3(CKSG2016874/HL)

Flood Risk of Flood Protection Region Enclosed by Songzi Levee in Complex River Network(Ⅰ): Development and Verification of Numerical Model

LIU Ya, YAO Shi-ming, ZHU Yong-hui, ZOU Ji   

  1. Key Laboratory of River Regulation and Flood Control of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China
  • Received:2017-08-25 Online:2019-03-01 Published:2019-03-20

摘要: 长江中下游地处冲积平原,洪水灾害较为频繁,沿江堤防是生命财产和生产设施的第一道屏障。其中荆江河段洪水峰高量大,且两岸支流众多、江湖关系复杂,防洪形势尤为严峻。以上荆江松滋江堤防洪保护区为研究对象,分析了可能产生的堤防溃口;在对复杂的荆江—洞庭湖水系进行概化的基础上,建立一二维耦合数学模型,研究了1 000 a一遇洪水条件下松滋江堤发生溃决后长江干流及防洪保护区内的洪水演进过程,并以最大淹没水深、淹没时间及最大流速为风险要素,分析了保护区内的洪水风险分布情况。文章共分为2篇,此为第一篇,旨在阐述一二维耦合数学模型建立与率定验证过程。

关键词: 洪水风险, 防洪保护区, 松滋江堤, 数值模拟, 堤防溃口, 率定验证

Abstract: Located in alluvial plain, the middle and lower Changjiang River suffers from frequent flood disasters. Embankment is the first barrier to protect life and property along the river. The Jingjiang River reach in the middle Changjiang River is exposed to a more serious flood control situation because of large amount of high flood peak and complex river-lake relation. In this research, the flood risk in the flood protection region enclosed by Songzi Levee of upper Jingjiang River reach is assessed. The flood routing process in mainstream Changjiang River and the studied flood protection region in the presence of levee break during a 1000-year event flood is simulated using a 1-D and 2-D coupled mathematical model with generalized river network of Jingjiang River and Dongting Lake water system. Maximum flood depth, inundation duration, and maximum flow velocity are selected as risk elements to analyze the distribution of flood risk. The article is divided into two parts, one of which is presented here to expound the establishment of coupled mathematical model and the process of calibration and verification.

Key words: flood risk, flood protection region, Songzi levee, numerical simulation, levee breach, calibration and verification

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