DELFT 3D在离岸人工岛建设中的应用——以海南岛万宁日月湾人工岛为例  

Application of DELFT 3D model for plan design of an artificial island——A case study for the artificial island construction in the Riyue Bay,Wanning City,Hainan Island

作　　者：龚文平[1] 李昌宇[1] 林国尧 莫文渊[2] 

机构地区：[1]中山大学海洋学院,广东广州510275 [2]海南省海洋开发规划设计研究院,海南海口570125

出　　处：《海洋工程》2012年第3期35-44,共10页The Ocean Engineering

基　　金：国家自然科学基金资助项目(40976052);国家海洋局公益项目资助课题(200905008)

摘　　要：离岸建设人工岛是围填海的重要方式之一。人工岛的建设势必改变工程区的水动力条件、泥沙输运格局与海岸演变状况。选取合理的平面布置方案,减少工程建设对海岸环境的负面影响,是人工岛建设能否成功的关键因素。以海南岛万宁日月湾人工岛建设为例,利用DELFT 3D模型系统,研究原场与不同平面布置方案后的波浪传播、波生流、泥沙输运与岸滩演变,探讨不同人工岛方案岛后形成连岛坝(Tombolo)或突出体(Salient)的可能性及泥沙淤积体积的大小,分析不同方案的优劣。研究表明,不同人工岛方案因为其大小、离岸距离及所处位置的差异,对岛后的波浪传播、波生流、泥沙输运与地形冲淤演变产生不同的影响。人工岛离岸距离越远、所处位置水深越大,人工岛在波峰线上的投影长度越短,形成连岛坝的可能性越小。The construction of offshore artificial island has become one of the dominant ways for land reclamation. It will definitely alter the hydrodynamics, sediment transport and coastal morphology in the surrounding area. A critical issue for the success of the project is to choose an optimal layout and minimize its negative impact on the regional environment. This case study focuses on the application of DELFT 3D model to the plan design of an artificial island in Riyue Bay, Wanning City, Hainan Island. Through simulation of the chan- ges in wave propagation, wave induced circulation, sediment transport and morphological evolution under different layout schemes, the possibility of formation of tombolo or salient is discussed, and the potential accumulated sand volume is calculated. Consequently, the advantages and disadvantages of each layout scheme are compared, and finally, an optimal scheme is recommended. The study results show that the possibility of the formation of the tombolo is reduced as the artificial island becomes far away from the coastline, the loca- tion is deeper, and the projected length on the wave crest is shorter.

关 键 词：DELFT3D 人工岛 连岛坝 突出体 海南岛 

分 类 号：TV148[水利工程—水力学及河流动力学] U651.4[交通运输工程—港口、海岸及近海工程]