闽江感潮河段潮汐-洪水相互作用数值模拟

傅赐福; 董剑希; 刘秋兴; 于福江

闽江感潮河段潮汐-洪水相互作用数值模拟

1.
国家海洋环境预报中心, 北京 100081
2.
国家海洋环境预报中心, 北京 100081;国家海洋局海洋灾害预报技术研究重点实验室, 北京 100081

基金项目: 海洋公益性行业科研专项经费项目(20090513).

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出版历程
- 收稿日期: 2014-08-06
- 修回日期: 2015-02-04

Flood-tide interaction numerical simulation in Minjiang River tidal reach

1.
National Marine Environmental Forecasting Center, Beijing 100081, China
2.
National Marine Environmental Forecasting Center, Beijing 100081, China;Key Laboratory of Research on Marine Hazards Forecasting, State Oceanic Administration, Beijing 100081, China

摘要

摘要: 本文分析了闽江感潮河段洪水、潮汐特征,利用高精度GIS数据建立了基于非结构三角网的高分辨率洪-潮耦合模型,在闽江口重点区域的网格分辨率达到50~100 m.选取竹岐断面作为径流边界并基于"2006.6.6"洪水过程设计了3组数值实验,模拟结果表明:相比于只考虑洪水或者潮汐,在耦合洪水和潮汐后,各代表站的模拟值与实测值更为吻合;在30年一遇洪水的作用下,闽江感潮河段各断面的原有潮汐特征都不同程度地被洪水信号所影响,其中,文山里和解放大桥站表现出明显的洪水特征,而峡南、白岩潭和琯头站则表现出洪、潮混合特征;从峡南到琯头对应河段在高潮时段流速减小而低潮时段则流速增大,说明该河段存在很明显的洪-潮相互作用.
- 闽江感潮河段 /
- ADCIRC二维模型 /
- 高分辨率 /
- 洪-潮相互作用
Abstract: Flood and tide features in Minjiang River tidal reach are analyzed and a high-resolution flood-tide coupled model which used high-resolution GIS data for Minjiang Estuary with the highest grid resolution of 50 to 100 m at key areas has been established in this paper. Unstructured triangular mesh that can realize 50 to 100 m' grid resolution at key areas is employed in the model. Zhuqi section has been chosen for flood boundary,and three numerical experiments have been conducted for June 6 2006 flood process. The experiments' results indicated that,when coupled with tide and flood,the simulation of each tide gauge agree very well with measured data compared with model results only with flood or tide; the original tidal features have been changed at the different sections in Minjiang River tidal reach by the flood signals,obvious flood characteristics have been shown in Wenshanli and Jiefang Bridge station,flood-tidal mixed characteristics have been shown in Xianan,Baiyantan and Guantou station; the strong interaction between tide and flood occurred in the watercourse (from Xiannan in South Channel to Guantou) because the current velocity is reduced during high water time but increasing during low water time.
- Minjiang River tidal reach /
- ADCIRC-2D model /
- high resolution /
- flood-tide interaction

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