湛江湾外航道二侧浅滩冲淤变化的成因分析  

Cause Analysis of Erosion and Deposition Two Side of Channel Sandbar Outside of Zhanjiang Bay

作　　者：李拴虎[1] 

机构地区：[1]国家海洋局第一海洋研究所,青岛266061

出　　处：《科学技术与工程》2013年第35期10595-10599,共5页Science Technology and Engineering

基　　金：国家海洋公益性行业科研专项(Z01005010)同助

摘　　要：通过对湛江湾不同时期的海底地形图进行对比,发现近年来湛江湾外航道南北二侧的拦门沙体积在不断缩小,地貌形态由丘陵状逐渐向梳状地貌演变;其中航道南侧等深线一直向东海岛岸线逼近,岸线侵蚀严重。导致这一变化的成因进行系统全面的分析,结果表明,由于湛江湾内近年来大规模的围填海工程改变了整个湛江湾的纳潮量、泥沙来源、悬沙含量和潮流特征,使得原本处于平衡状态的湾外浅滩发生冲淤变化。Compare of the different periods of Zhanjiang Bay bathymetric chart,in recent years,the sandbars of two sides of Zhanjiang Bay channel are shrinking. Sandbar topography are evolving gradually from hills to comb to- pography. The isobath of south channel is approaching to the coastline of Donghai Island. The coastline is eroding seriously. A comprehensive analysis of the causes is made. The results show that, in recent years, there are many large-scale reclamation projects in Zhanjiang Bay, which changed the tidal volume, sediment sources, suspended sediment concentration and flow characteristics. The sandbar of outside the Bay in equilibrium occurs erosion and deposition is made.

关 键 词：湛江湾 浅滩 梳状地貌 冲淤变化 

分 类 号：P737.121[天文地球—海洋地质]