| 潜式与离岸式人工岬头护滩作用和水交换特征比较 |
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| 引用本文： | 陈淑敏,潘毅,陈永平,杨耀中.潜式与离岸式人工岬头护滩作用和水交换特征比较[J].海洋工程,2020,38(1):120-129. |
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| 作者姓名： | 陈淑敏 潘毅 陈永平 杨耀中 |
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| 作者单位： | 河海大学 港口海岸与近海工程学院，江苏 南京 210098,河海大学 港口海岸与近海工程学院，江苏 南京 210098,河海大学 港口海岸与近海工程学院，江苏 南京 210098,江苏省水利厅，江苏 南京 210029 |
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| 基金项目： | 江苏省333高层次人才培养工程（BRA2018381）；国家自然科学基金面上项目（51979098） |
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| 摘 要： | 潜式人工岬头和离岸式人工岬头是两种改良式人工岬头,与传统人工岬头相比,它们对岸滩的保护效果稍弱,但能改善岬湾内的水交换。以北戴河西海滩养滩工程为研究对象,采用数值模拟的方法,对潜式岬头和离岸式岬头的护滩效果和改善水交换效果进行研究比较。首先建立岸线演变模型和物质输运模型,对工程后的岸线演变及水交换情况进行模拟。岸线演变的模拟结果表明,潜式岬头和离岸式岬头的护滩效果均较好,但潜式岬头后的岸线形状相比离岸式岬头后更为平滑。同时讨论海滩的侵蚀和淤积特性对潜式岬头和离岸式岬头的影响以及潮汐条件对冲淡时间的影响。与传统岬头相比,潜式岬头和离岸式岬头可以很好地减少岬后冲淡时间以及改善岬湾内水交换,而护滩效果只是稍有减弱。因此,潜式岬头和离岸式岬头都是改善岬湾水交换的有效工程措施。
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| 关 键 词： | 岸线演变 冲淡时间 人工岬头 岸滩保护 水交换 北戴河 护滩效果 |
Comparison of performances of submerged and detached artificial headlands in beach protection and water exchange |
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| CHEN Shumin,PAN Yi,CHEN Yongping and YANG Yaozhong.Comparison of performances of submerged and detached artificial headlands in beach protection and water exchange[J].Ocean Engineering,2020,38(1):120-129. |
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| Authors: | CHEN Shumin PAN Yi CHEN Yongping and YANG Yaozhong |
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| Institution: | College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China and Jiangsu Provincial Department of Water Resources, Nanjing 210029, China |
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| Abstract: | Submerged Artificial Headland (SAH) and Detached Artificial Headland (DAH) are two types of modified artificial headlands to provide better water exchange with slightly weakening beach protection effect, compared with Traditional Artificial Headland (TAH). In this research, a numerical investigation is conducted on performances of SAH and DAH in a beach nourishment project. The beach protection and water exchange are considered respectively. A shoreline model and a constituent transport model are set up to simulate the post-project shoreline change and water exchange. The results of the shoreline changed model show that both the SAH and DAH have good performance in protecting the beach behind them, while in SAH case the shoreline has a smoother shape. The effects of eroding and silting characteristics of the beach on the performance of SAH and DAH are also analized. The SAH and DAH have the similar performance of reducing the flushing time and improving the water exchange in the area behind the artificial headlands, compared with TAH. The effect of tidal condition on the flushing time is also discussed. It is suggested that both SAH and DAH are feasible and effective measures to strengthen the water exchange at the cost of an acceptable loss of beach protection. |
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| Keywords: | shoreline change flushing time artificial headland beach protection water exchange Beidaihe beach protection effect |
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