近30年台州浅滩及其邻近海域海床演变特性分析  

Characteristic Analysis on Seabed Evolution of Taizhou Shoal and Adjacent Waters during the Past 30 Years

作　　者：何坚[1] 鲁海燕[2,3] 张莎[1] 曹颖[2,3] 

机构地区：[1]台州市椒江区水利局,浙江台州318000 [2]浙江省水利河口研究院,浙江杭州310020 [3]浙江省河口海岸重点实验室,浙江杭州310020

出　　处：《浙江水利科技》2015年第4期1-4,共4页Zhejiang Hydrotechnics

基　　金：国家自然科学基金(41306082;51379190);浙江省自然科学基金(LY12E09010)资助

摘　　要：利用1983、1988、2004和2011年4个典型年份水下地形数据,综合分析了台州浅滩及邻近海域近30a来岸线和海床演变的特点,并分析了其冲淤的主要动力机制。结果表明:台州浅滩及邻近海域海床整体上较为稳定,目前呈微冲态势;台州浅滩淤涨速率加快;浅滩前沿海域及口门附近深槽冲刷加剧。由于长江入海泥沙的减少,台州湾两岸促淤围涂工程对泥沙的拦截、岸线缩窄后束水作用引起的挟沙能力加强、龙口闭气取土工程对中、低潮滩泥沙的利用,是台州湾目前呈微冲态势的主要影响因素,而人工促淤和围涂工程是台州浅滩淤涨加快的主要原因。Using underwater topography data of four typical years （ 1983, 1988, 2004 and 2011）, this paper comprehensively analyzes the evolution characteristics of the shoreline and seabed about Taizhou shoal and adjacent waters in the past 30 years, and analyzes the main dynamic mechanism of its erosion and deposition. The results show： the seabed in Taizhou Shoal and adjacent area is generally in a stable state, but slightly scoured currently; accretion rate of Taizhou shoal accelerates, erosion of shoal frontier waters and deep trench near the entrance intensifies. The reduction of the sediment flux from Yangtze River to sea, sediment interception of Taizhou Bay reclamation project on both sides, strengthening of sediment carrying capacity caused by beam water effect after narrowing the shorehne, and using medium and low tide beach sediment for earth dike breath are the main influence？ factors for the slightly erosion situation in Taizhou Bay; however, artificial siltation and reclamation project are the main reason that the siltation rate of Taizhou shoal accelerates.

关 键 词：台州湾 浅滩 冲淤演变 水下地形 

分 类 号：TV882[水利工程—水利水电工程]