珠江口黄茅海枯季表层沉积物特性及输移研究  

Study of characteristics and transport pattern of surface sediment during dry seasons in Huangmao Estuary

作　　者：贾良文[1] 文艺[1] 

机构地区：[1]中山大学近岸海洋科学与技术研究中心,广东广州510275

出　　处：《泥沙研究》2013年第1期60-66,共7页Journal of Sediment Research

基　　金：广东省科技计划项目"珠江口黄茅海河口湾围填海的累积环境影响研究"(2011B031100008);水利部公益性行业科研项目(200901034-01)

摘　　要：应用2010年1月和2011年4月黄茅海枯水大潮表层沉积物样品粒度分析资料,研究了黄茅海枯季表层沉积物特征,应用Gao-Collins粒径趋势分析模型,研究了其表层沉积物输移趋势。研究表明,黄茅海枯季表层沉积物类型以粘土质粉砂(YT)为主,沉积物分选较差,偏态以近对称为主,峰态多为中等。湾顶至拦门沙内坡以北,表层沉积物向下输移;拦门沙内坡至大杧岛以北,表层沉积物向上输移;大杧岛至湾口,其中,大杧岛至荷包岛以西,中口为自南向北搬运为主,向上转为东南向西北输移为主,大杧岛至荷包岛以东为自北向南搬运为主;表层沉积物输移具有明显的偏西倾向。黄茅海水动力的空间变化是表层沉积物输移的基本成因。Based on the grain size analysis of surface sediments sampled in the Huangmao Estuary in January 2010 and in April 2011, the characteristics of the surface sediments in the Huangmao Estuary are studied and the surface sediments transport pattern is scrutinized employing the grain size trend analysis. The results indi- cate that the surface sediments are mainly muddy silt, poorly sorted, symmetrical, and mesokurtic. From the head of the estuary to the north of inner slope of the sand bar, the surface sediment is transported downstream ; from the inner slope to the north of Damang island, the surface sediment is transported upstream; from Da- mang island to the outlets of the estuary, three types of sediment transport exist; among which, to the west of Damang island and Hebao island,in the middle outlet, the surface sediment is transported from south to north, further upstream it is from southeast to northwest; to the east of Damang island and Hebao island, it is trans- ported from north to south. The surface sediment is generally deflected to the west. The spatial change and transport pattern of the surface sediment are well in agreement with the hydrodynamic change in the Huangmao Estuary.

关 键 词：黄茅海 表层沉积物 特性 输移 

分 类 号：P512.2[天文地球—地质学]