| 江苏省长江干流沿程洪潮设计水位数值模拟研究 |
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| 引用本文： | 罗龙洪,闻云呈,袁文秀,夏云峰,王晓俊,张新周.江苏省长江干流沿程洪潮设计水位数值模拟研究[J].海洋工程,2020,38(3):124-131,168. |
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| 作者姓名： | 罗龙洪 闻云呈 袁文秀 夏云峰 王晓俊 张新周 |
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| 作者单位： | 江苏省水利工程规划办公室, 江苏 南京 210029;南京水利科学研究院 港口航道泥沙工程交通行业重点实验室, 江苏 南京 210024 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项资金（Y219009）；河口海岸保护与治理创新团队（Y220013）；三峡后续项目（12610100000018J129-5）；江苏省水利科技项目（2015004） |
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| 摘 要： | 长江干流江苏段地处长江下游河口地区,全线位于感潮河段,沿程水位既受上游长江径流、外海潮位、台风的影响,也受到工情变化、支流入汇等影响。长江江苏段现行洪潮设计水位是按《长江流域综合利用规划简要报告》(1990年)中确定的无台风影响水位实施。近年来,由于上游水、沙、工情条件变化,开展上游大通径流、风暴潮、区间入汇等对沿程洪潮水位的影响研究十分必要。建立大通至长江口二维水沙数学模型与外海风暴潮模型,研究不同影响因素作用下长江干流江苏段沿程洪潮设计水位变化。研究成果表明:南京河段水位主要受上游径流影响;江阴以下主要受外海潮汐及风暴潮的影响;南京至江阴段则受上游径流、外海潮汐、风暴潮三者的共同作用影响。外海天文大潮、风暴潮"两碰头"和上游大径流、外海天文大潮与风暴潮"三碰头"引起的沿程增水值呈驼峰分布,最大值分别发生在江阴和天生港附近,最大增幅1.65 m。研究结果已为长江江苏段堤防防洪能力提升工程建设提供技术支撑。
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| 关 键 词： | 长江干流 洪潮遭遇 设计水位 数学模型 影响因素 |
| 收稿时间： | 2019/7/25 0:00:00 |
Mathematical simulation of design water level of flood and tide along the main stream of the Yangtze River in Jiangsu Province |
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| LUO Longhong,WEN Yuncheng,YUAN Wenxiu,XIA Yunfeng,WANG Xiaojun,ZHANG Xinzhou.Mathematical simulation of design water level of flood and tide along the main stream of the Yangtze River in Jiangsu Province[J].Ocean Engineering,2020,38(3):124-131,168. |
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| Authors: | LUO Longhong WEN Yuncheng YUAN Wenxiu XIA Yunfeng WANG Xiaojun ZHANG Xinzhou |
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| Institution: | Water Resources Planning Bureau of Jiangsu Province, Nanjing 210029, China;Nanjing Hydraulic Research Institute, Key Lab of Port, Waterway and Sedimentation Engineering of the Ministry of Transport, Nanjing 210024, China |
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| Abstract: | The Jiangsu reach of the main stream of the Yangtze River, as a completely tidal section, is located in the estuary area of the lower reaches of the Yangtze River. The water level along the reach is affected not only by the runoff of the upper reaches of the Yangtze River, the offshore tidal level and typhoon, but also by the changes of working conditions and the influx and confluence of tributaries. The current design level of flood surges in the Jiangsu reach of the Yangtze River is applied according to the water level without typhoon influence determined in the Brief Report on Comprehensive Utilization Planning of the Yangtze River Basin (1990). In recent years, it is essential to study the influence of upstream Datong runoff, storm surges and interval inflow and confluence on the water level of flood surges along the reach due to the changes of water, sediments and working conditions in the upstream. In this research, a two-dimensional mathematical model of water and sediments from Datong to the Yangtze estuary and a model of storm surges at the offshore are established to study the design water level changes of flood surges along the Jiangsu reach of the main stream of the Yangtze River under the action of different influencing factors. The research results show that the water level of Nanjing river section is mainly affected by the upstream runoff, the section below Jiangyin is mainly affected by offshore tides and storm surges, and the section between Nanjing and Jiangyin is under the joint action of upstream runoff, offshore tides and storm surges. The water increase values caused by "the encounter" of open-sea astronomical tides and storm surges and "the encounter" of upstream runoff, offshore astronomical tides and storm surges are distributed in a hump-like way, with the maximum value occurring in the vicinity of Jiangyin and Tianshenggang respectively, and with the maximum increase being 1.65m. The research results have been used as the basis for the construction of the project for improving the dike flood control capacity of the Jiangsu reach of the Yangtze River. |
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| Keywords: | Yangtze River flood meeting with tide design water level mathematical model influencing factors |
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