大鱼山填海工程对海床冲淤变化影响分析  

Influence of Dayushan reclamation project on sea-bed erosion and siltation

作　　者：罗意 来向华 季有俊 黄潘阳 宋泽坤 LUO Yi;LAI Xianghua;JI Youjun;HUANG Panyang;SONG Zekun(Second Institute of Oceanography,Ministry of Natural Resources,Hangzhou 310012,China;Hangzhou Ocean Engineering Survey,Design and Research Institute Co.,Ltd.,Hangzhou 310012,China)

机构地区：[1]自然资源部第二海洋研究所,浙江杭州310012 [2]杭州国海海洋工程勘测设计研究院有限公司,浙江杭州310012

出　　处：《水运工程》2023年第11期1-7,共7页Port & Waterway Engineering

基　　金：国家自然科学基金资助项目(52071289)。

摘　　要：根据舟山大鱼山海域1960—2021年间5个年份的水深地形资料,基于GIS(地理信息系统)技术采用数字化定量冲淤计算和特征等深线叠加方法,对工程附近典型水下地形的平面冲淤和平面形态变化规律进行研究,探讨大鱼山填海工程对周边海床冲淤变化的影响。结果表明:自然状态下,研究区整体处于轻微冲刷状态;填海后,南侧深槽近岸淤积,外侧和北侧深槽继续冲刷,东西两侧浅滩呈现大幅度淤积。大鱼山填海工程极大地改变了原本岸线分布以及周边水动力泥沙环境,最终导致填海区附近海床冲淤变化,但整体仍维持海底的潮滩分布格局。Based on the bathymetric and topographic data of five years from 1960 to 2021 in the Dayushan Sea area of Zhoushan,we discuss the influence of the Dayushan reclamation project on the changes of surrounding seabed erosion and siltation.We adopt the digital quantitative erosion and siltation calculation and the method of characteristic isobath superposition based on GIS technology to study the changes in surface erosion and siltation and surface morphology of typical underwater terrains near the project.The results show that the whole study area is in a slight erosion state in natural conditions.After reclamation,the south trough silts near shore,while the outer and northern deep troughs continue to erode,and the shoals on the east and west show significant siltation.The Dayushan reclamation project has greatly changed the original shoreline distribution and the surrounding hydrodynamic sediment environment.This eventually leads to sea-bed erosion and siltation changes near the reclamation area,but the seabed tidal flat distribution is unchanged.

关 键 词：填海工程 海床冲淤 数字高程模型 

分 类 号：P751[交通运输工程—港口、海岸及近海工程] U61[天文地球—海洋科学]