海洋地质前沿2026，Vol.42Issue(9)：67-78,12.DOI:10.16028/j.1009-2722.2025.213
鱼山岛围填海工程对水动力及泥沙输运的影响
Hydrodynamic and suspended sediment transport responses to reclamation in Yushan Island
摘要
Abstract
Land reclamation reshapes nearshore hydrodynamics and sediment transport by altering coastline mor-phology.In this study,the reclamation project at Yushan Island in Hangzhou Bay was investigated.A two-dimen-sional hydrodynamic-sediment coupling model was built using MIKE21 and validated,from which tidal-current fields,bed shear stress,suspended sediment concentration(SSC)distributions,and seabed scour-siltation charac-teristics before and after project implementation were systematically analyzed.Results show that the blocking ef-fect of artificial dikes reduced flow velocities by 0.2-0.5 m/s and bed shear stress by 0.2-0.4 N/m2 on the frontal and lee sides,suppressing sediment resuspension and decreasing nearshore SSC by 0.02-0.06 kg/m3.At dike corners,flow deflection increased velocity and bed shear stress by 0.1-0.3 m/s and 0.1-0.3 N/m2,respectively,causing increased SSC.The reclamation-induced scour-siltation variations showed pronounced local characterist-ics.In addition,the enhanced siltation was primarily concentrated within approximately 2 km of the artificial shoreline,and annual siltation rates increased by 0-0.6 m/a,whereas outer regions showed attenuated changes.Deep troughs on the north and south sides of Dayushan Island maintained high flow velocities and bed shear stress,showing limited morphological changes and overall stable channel-shoal patterns.Therefore,land reclama-tion altered nearshore current structures and the sediment resuspension-deposition balance,resulting in adjusted scour-siltation patterns,with the magnitude of these effects gradually decreasing with increasing distance from the artificial shoreline.关键词
围填海工程/鱼山岛/数值模拟/悬浮泥沙浓度/底床切应力/海床冲淤Key words
land reclamation/Yushan Island/numerical simulation/suspended sediment concentration/bed shear stress/seabed erosion and deposition分类
海洋科学引用本文复制引用
张子健,高飞,丁咚,曹珂..鱼山岛围填海工程对水动力及泥沙输运的影响[J].海洋地质前沿,2026,42(9):67-78,12.基金项目
山东省自然科学基金"冬季黄海切变锋生成、演化规律及其沉积效应"(ZR2022MD105),"互花米草除治过程中盐沼沉积物多源碳库变化机制:以胶州湾滨海湿地为例"(ZR2023MD017) （ZR2022MD105）
自然资源部研究式调查项目"基于数值模拟的舟山渔山岛海域围填区冲淤演化过程研究"(2024ZRYJDC010) （2024ZRYJDC010）
中国地质调查局项目"长江口海岸带地质环境调查与监测"(DD20242714) （DD20242714）
