围海工程前后瓯飞滩冲淤变化特征及动力机制分析  

Analysis of the characteristics and dynamic mechanismof scouring and silting changes in Oufei TidalFlat before and after the reclamation project

作　　者：蔡家新 潘国富 陈培雄 CAI Jiaxin;PAN Guofu;CHEN Peixiong(Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China)

机构地区：[1]自然资源部第二海洋研究所,浙江杭州310013

出　　处：《海洋学研究》2021年第3期63-71,共9页Journal of Marine Sciences

摘　　要：围海工程拓展出陆地空间的同时对工程海域地形变化产生较大的影响。本文以温州瑞安东部瓯飞滩海域为研究区,通过GIS处理水下地形资料,构建Delft3D数学模型,分析围海工程引起的瓯飞滩地形冲淤变化特征及其动力机制。研究表明,工程实施后研究区海域涨潮占优特性有所增强,近岸海域整体保持淤积态势,淤积速率略有增加;局部区域受影响较大,如围堤凸区附近受挑流作用表现为缓慢冲刷,而在围堤凹处受阻流效应影响表现为快速淤涨。研究对瓯飞滩及类似淤泥质海岸的开发利用与保护有重要的参考价值。While the reclamation project expands the land space to the coastal areas,it will also have a significant impact on the topographic changes of the project sea area.Based on the measured data and the results of the Delft3D mathematical modeling,taking the eastern sea area of Ruian,Wenzhou as the research area in this study,the characteristics and dynamic mechanism of the topographic erosion and deposition changes caused by the Oufei Tidal Flat Reclamation Project were analyzed.Studies show that the topography of the sea area has changed significantly after the implementation of the project,but the distribution characteristics of erosion and siltation in different areas are not consistent,and the dynamic mechanisms that cause changes are also different.From an overall point of view,the dominant feature of rising tides in the research sea area has been enhanced,and the coastal sea area maintains an overall siltation situation,and the siltation rate has increased slightly.From a local point of view,the vicinity of the dike bulge is affected by the effect of flip flow,which shows slow erosion,and at the concave corner of the dike affected by the blocking flow effect,it appears as rapid silting.The above results have important reference value for guiding the protection and utilization of Oufei Tidal Flat and other similar tidal flats.

关 键 词：围海工程 瓯飞滩 冲淤变化 动力机制 

分 类 号：TV148.1[水利工程—水力学及河流动力学]