上游洪水对台风风暴潮过程期间长江口水位的影响研究
发布时间：2018-11-25 08:16
【摘要】：河口地区是河流与海洋相互作用的集中交汇区,也是上游洪水、天文潮和风暴潮等各种动力要素的综合作用区,该区域的水动力研究尤为复杂。长江作为我国第一大河,上游洪水对河口地区的影响尤其明显,特别是天文高潮、风暴潮与洪峰效应相叠加时(俗称"三碰头"),往往会对沿岸造成严重的海洋灾害。以长江大通水文站为上边界建立了一个适合于长江口地区的精细化天文潮、风暴潮和洪水耦合模型,通过对近年来影响长江口的典型台风风暴潮过程的模拟发现,耦合洪水后模型计算结果与实测更为吻合。通过理想数值实验,充分考虑天文潮、风暴潮和洪水的相互作用,定量分析了不同径流量对长江口不同区域的影响,并给出了在不同上游洪水流量和不同台风强度组合情景下,洪水对长江口地区水位的影响以及长江口地区可能出现的高水位。
[Abstract]:Estuarine area is the convergence area of the interaction between rivers and oceans, and it is also the comprehensive action area of various dynamic elements such as upstream flood, astronomical tide and storm surge. The hydrodynamic research in this area is especially complex. As the largest river in China, the upper reaches of the Yangtze River have a significant impact on the estuarine area, especially the astronomical climax. The storm surge and Hong Feng effect are superimposed on each other (commonly known as "three meeting"), which often cause serious marine disasters along the coast. Taking Datong Hydrological Station of Yangtze River as the upper boundary, a fine coupling model of astronomical tide, storm surge and flood is established for the Changjiang Estuary area. The simulation results of typical typhoon storm surge processes affecting the Changjiang Estuary in recent years have been found. The calculated results of the coupled flood model are in good agreement with the measured data. Through ideal numerical experiments, the interaction of astronomical tide, storm surge and flood is fully considered, and the effects of different runoff on different regions of Changjiang Estuary are quantitatively analyzed, and the combination scenarios of different upstream flood discharge and different typhoon intensity are given. The influence of flood on the water level in the Changjiang Estuary and the possible high water level in the Changjiang Estuary.
【作者单位】： 国家海洋环境预报中心;上海市水文总站;
【基金】：海洋公益性行业科研专项(201205017)
【分类号】：P731.23
[Abstract]:Estuarine area is the convergence area of the interaction between rivers and oceans, and it is also the comprehensive action area of various dynamic elements such as upstream flood, astronomical tide and storm surge. The hydrodynamic research in this area is especially complex. As the largest river in China, the upper reaches of the Yangtze River have a significant impact on the estuarine area, especially the astronomical climax. The storm surge and Hong Feng effect are superimposed on each other (commonly known as "three meeting"), which often cause serious marine disasters along the coast. Taking Datong Hydrological Station of Yangtze River as the upper boundary, a fine coupling model of astronomical tide, storm surge and flood is established for the Changjiang Estuary area. The simulation results of typical typhoon storm surge processes affecting the Changjiang Estuary in recent years have been found. The calculated results of the coupled flood model are in good agreement with the measured data. Through ideal numerical experiments, the interaction of astronomical tide, storm surge and flood is fully considered, and the effects of different runoff on different regions of Changjiang Estuary are quantitatively analyzed, and the combination scenarios of different upstream flood discharge and different typhoon intensity are given. The influence of flood on the water level in the Changjiang Estuary and the possible high water level in the Changjiang Estuary.
【作者单位】： 国家海洋环境预报中心;上海市水文总站;
【基金】：海洋公益性行业科研专项(201205017)
【分类号】：P731.23
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