松滋江堤防洪保护区洪水风险研究(Ⅰ)——模型的建立与验证
|
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。
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.
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.
引文
[1] 张曼,周建军,黄国鲜.长江中游防洪问题与对策[J].水资源保护,2016,32(4):1-10.
[2] 松滋水利志编纂领导小组,松滋市水利局.松滋水利志[M].北京:中国环境科学出版社,2008.
[3] 韩龙喜,张书农,金忠青.复杂河网非恒定流计算模型——单元划分法[J].水利学报,1994,(2):52-56.
[4] HIRSCH C. Numerical Computation of Internal and External Flows[M]. USA: Wiley, 2007.
[5] 孙昭华,李义天,曹志芳.河网非恒定水沙数学模型研究[J].水科学进展,2004, 15(2):165-172.
[6] 吴作平,杨国录,甘明辉.荆江—洞庭湖水沙数学模型研究[J].水利学报, 2003,(7):96-100.
[7] 李琳琳.荆江-洞庭湖耦合系统水动力学研究[D].北京:清华大学, 2009.
[8] 施勇,栾震宇,胡四一.长江中下游水沙数值模拟研究[J].水科学进展,2005, 16(6):840-848.
[9] 李义天.河网非恒定流隐式方程组的汊点分组解法[J].水利学报,1997(3):49-57.
[10] 谭维炎,胡四一. 二维浅水流动的一种普适的高性能格式——有限体积Osher格式[J]. 水科学进展,1991,2(3):154-161.
[11] 水利部长江水利委员会.松滋江堤加高加固初步设计报告[R].武汉:长江水利委员会, 1993.
[2] 松滋水利志编纂领导小组,松滋市水利局.松滋水利志[M].北京:中国环境科学出版社,2008.
[3] 韩龙喜,张书农,金忠青.复杂河网非恒定流计算模型——单元划分法[J].水利学报,1994,(2):52-56.
[4] HIRSCH C. Numerical Computation of Internal and External Flows[M]. USA: Wiley, 2007.
[5] 孙昭华,李义天,曹志芳.河网非恒定水沙数学模型研究[J].水科学进展,2004, 15(2):165-172.
[6] 吴作平,杨国录,甘明辉.荆江—洞庭湖水沙数学模型研究[J].水利学报, 2003,(7):96-100.
[7] 李琳琳.荆江-洞庭湖耦合系统水动力学研究[D].北京:清华大学, 2009.
[8] 施勇,栾震宇,胡四一.长江中下游水沙数值模拟研究[J].水科学进展,2005, 16(6):840-848.
[9] 李义天.河网非恒定流隐式方程组的汊点分组解法[J].水利学报,1997(3):49-57.
[10] 谭维炎,胡四一. 二维浅水流动的一种普适的高性能格式——有限体积Osher格式[J]. 水科学进展,1991,2(3):154-161.
[11] 水利部长江水利委员会.松滋江堤加高加固初步设计报告[R].武汉:长江水利委员会, 1993.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |