| 分汊河口地貌演变对整治工程的响应 |
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| 引用本文： | 缴 健,高祥宇,丁 磊,张新周.分汊河口地貌演变对整治工程的响应[J].海洋工程,2019,37(3):143-150. |
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| 作者姓名： | 缴 健 高祥宇 丁 磊 张新周 |
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| 作者单位： | 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 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 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 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 210029 |
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| 基金项目： | 国家重点研发计划(2017YFC0405400,2018YFC0407400);南京水利科学研究院基本科研业务费专项资金(Y218002) |
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| 摘 要： | 以概化分汊河口为研究对象,针对两汊中长期地貌演变对整治工程响应的问题,采用平面二维数学模型对整治工程前后分别进行20年地貌演变模拟。分析结果表明:整治工程对落潮含沙量影响较大,工程汊道落潮分沙比有显著下降;整治工程主要导致工程汊道坝田区淤积和航道冲刷,同时也增加了非工程汊道的冲刷及淤积厚度;工程后工程汊道淤积量增加,冲刷量减小,冲淤总量减小,非工程汊道淤积量不变,冲刷量增加,冲淤总量增加。
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| 关 键 词： | 概化分汊河口 数学模型 整治工程 含沙量 分沙比 地貌演变 |
Response of the morphological evolution of bifurcated estuary to the regulation project |
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| JIAO Jian,GAO Xiangyu,DING Lei and ZHANG Xinzhou.Response of the morphological evolution of bifurcated estuary to the regulation project[J].Ocean Engineering,2019,37(3):143-150. |
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| Authors: | JIAO Jian GAO Xiangyu DING Lei and ZHANG Xinzhou |
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| Institution: | Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of Transport, Nanjing Hydraulic Research Institute,
Nanjing 210029, China,Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of Transport, Nanjing Hydraulic Research Institute,
Nanjing 210029, China,Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of Transport, Nanjing Hydraulic Research Institute,
Nanjing 210029, China and Key Laboratory of Port Waterway and Sedimentation Engineering of the Ministry of Transport, Nanjing Hydraulic Research Institute,
Nanjing 210029, China |
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| Abstract: | In this paper, a two-dimensional numerical model of schematized bifurcated estuary is used to simulate the morphological evolution before and after the regulation project for 20 years, mainly in order to study the response of the medium-and long-term morphological evolution of the engineering branch and the non-engineering branch to the regulation project. The results show that the regulation project has a great influence on the sediment concentration during the ebb tide, and the sediment diversion ratio of the ebb tide of the project branch is significantly decreased. The regulation project mainly leads to siltation of the dam field and erosion along the channel increases the scour and siltation depth of the non-engineering branch at the same time. After the project, the deposition amount of engineering branch increases, the erosion amount decreases and the total amount decreases. The deposition amount of nonengineering branch remains unchanged, the erosion amount increases and the total amount increases. |
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| Keywords: | schematized bifurcated estuary numerical model regulation project sediment concentration sediment diversion ratio morphological evolution |
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