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离岸式人工岛会对岛后岸滩演变产生重要影响。基于卫星遥感影像、实测水下地形和沉积物采样数据，应用波流泥沙数值模型分析了日月湾人工岛工程对岛后砂质岸滩区域水动力、沿岸泥沙输运及岸滩演变影响，探讨了人工岛布置对岛后连岛浅滩发育形态影响。研究结果表明：人工岛导致岸滩平面上岛后沙滩淤积、两翼冲刷，剖面上潮间带沙滩宽度缩窄、坡度变陡；沿岸输沙受海岸波浪动力主导，人工岛改变沿线水沙输运和岸滩冲淤集中发生于潮间带，潮位变动和潮流对沿岸输沙影响小；人工岛离岸距离对岛后连岛浅滩出水状态存在阈值，并随人工岛尺度调整，出水面积及淤积量最大峰值对应的离岸距离与该阈值数值相近。
Abstract：The evolution of backshore beach is significantly influenced by offshore artificial islands. In this paper, the effects of artificial island engineering on hydrodynamics, coastal sediment transport, and beach evolution in the sandy beach area behind the island were analyzed with a coupled wave-flow-sediment numerical model. The analysis was conducted based on satellite remote sensing images, the measured underwater topography, and sediment sampling data. Additionally, the influence of artificial island layout on the development and morphology of the shoal behind the island was examined. The results indicate that artificial islands induce beach accretion behind the island and erosion flanking the accretion zone, while causing narrowing and steepening of intertidal sandy beaches in the vertical profile. Longshore sediment transport is predominantly driven by wave dynamics, with sediment fluxes and beach morphology changes concentrated in the intertidal zone, whereas tidal variations and currents exert minimal influence. The offshore distance of the island is found to determine a threshold for tombolo formation, which varies with island size. The maximum tombolo area and accretion volume are observed when the offshore distance is close to this threshold.
[1]MARTN-ANTN M,NEGRO V,CAMPO J,et al.Review of coastal land reclamation situation in the world [J].Journal of Coastal Research,2016,75:667-671.
[2]SALAHUDDIN B.The marine environmental impacts of artificial island construction [D].Durham:Duke University,2006.
[3]沈雨生，夏子立，周益人，等.港珠澳大桥人工岛波浪爬高试验研究[J].水道港口，2023,44(2):166-172.SHEN Y S,XIA Z L,ZHOU Y R,et al.Experimental study on wave run-up of artificial island of Hong Kong-Zhuhai-Macao Bridge[J].Journal of Waterway and Harbor,2023,44(2):166-172.
[4]VOUSDOUKAS M I,RANASINGHE R,MENTASCHI L,et al.Sandy coastlines under threat of erosion [J].Nature Climate Change,2020,10(3):260-263.
[5]MENTASCHI L,VOUSDOUKAS M I,PEKEL J F,et al.Global long-term observations of coastal erosion and accretion [J].Scientific Reports,2018,8(1):12876.
[6]费成鹏，胡日军，雒敏义，等.龙口湾水动力特征及其对人工岛群建设的响应 [J].海洋地质与第四纪地质，2022,42(1):81-95.FEI C P,HU R J,LUO M Y,et al.Hydrodynamic characteristics of Longkou Bay and its response to artificial island groups [J].Marine Geology & Quaternary Geology,2022,42(1):81-95.
[7]FU G W,LI J,YUAN K,et al.Wind-Wave-Current Coupled Modeling of the Effect of Artificial Island on the Coastal Environment[J].Applied Sciences,2023,13(12):13127171.
[8]李松喆.人工岛对沙质海岸动力泥沙环境及岸滩冲淤演变的影响研究[J].海洋工程，2021,39(4):144-153.LI S Z.Study on the influence of artificial island on dynamic sediment environment and beach erosion and deposition evolution of sandy coast[J].The Ocean Engineering,2021,39(4):144-153.
[9]林纪江，王平，胡日军，等.海南日月湾海域表层沉积物分布特征与运移趋势[J].海洋地质前沿，2023,39(6):11-21.LIN J J,WANG P,HU R J,et al.Distribution characteristics and migration trend of surface sediments in Riyue Bay,Hainan,South China[J].Marine Geology Frontiers,2023,39(6):11-21.
[10]李汉英，张红玉，王霞，等.海洋工程对砂质海岸演变的影响：以海南万宁日月湾人工岛为例[J].海洋环境科学，2019,38(4):575-581.LI H Y,ZHANG H Y,WANG X,et al.Influence on the sandy coast evolution of the ocean engineering:A case study of artificial Riyue island,Wanning city,Hainan Island [J].Marine Environmental Science,2019,38(4):575-581.
[11]张达恒，时连强，龚照辉，等.冬季波浪与人工岛联合作用下日月湾海滩冲淤演变特征[J].热带海洋学报，2022,41(4):71-81.ZHANG D H,SHI L Q,GONG Z H,et al.Evolution characteristics of beach erosion and accretion at the Riyue Bay under the combined impacts of winter waves and artificial island [J].Journal of Tropical Oceanography,2022,41(4):71-81.
[12]SHI J,ZHENG J,ZHANG C,et al.A 39-year high resolution wave hindcast for the Chinese coast:Model validation and wave climate analysis [J].Ocean Engineering,2019,183:224-235.
[13]ROELVINK D,RENIERS A,VAN DONGEREN A,et al.Modelling storm impacts on beaches,dunes and barrier islands [J].Coastal Engineering,2009,56(11):1133-1152.
[14]HARRIS M M,HERBICH J B.Effects of breakwater spacing on sand entrapment [J].Journal of Hydraulic Research,1986,24(5):347-357.
[15]HSU J R,SILVESTER R.Accretion behind single offshore breakwater [J].Journal of Waterway,Port,Coastal,and Ocean Engineering,1990,116(3):362-380.
[16]LEE J L,HSU J.Geometric parameter relationships for salient and tombolo in a multiple offshore breakwater system[C]// World Scientific.Proceedings of the Coastal Sediments 2019:Proceedings of the 9th International Conference.Florida:World Scientific,2019.
基本信息:
DOI：
中图分类号:P756.8;P737.1
引用信息:
[1]陈弋,童朝锋,孟艳秋.日月湾人工岛工程对岸滩演变影响研究[J].水道港口,2025,46(04):498-507.
基金信息:
国家自然科学基金重点项目(51339005)