甬江口及附近海域冲淤变化研究分析  

Research and Analysis on Erosion and Sedimentation Variation of Yongjiang River Mouth and Vicinity

作　　者：倪云林[1] 巩明[2] 杨辉[2] 周鸿权[2] 武小勇[2] 

机构地区：[1]浙江海洋学院海运与港航建筑工程学院,浙江舟山316022 [2]国家海洋局第二海洋研究所工程海洋学重点实验室,浙江杭州310012

出　　处：《浙江海洋学院学报（自然科学版）》2013年第6期537-542,共6页Journal of Zhejiang Ocean University(Natural Science Edition)

基　　金：舟山市科技计划项目(2013C31045);国家海洋局第二海洋研究所基本科研业务费专项(JT203);宁波市海域泥沙水动力环境调查和建设用海区域评价(009051);国家海洋局青年海洋科学基金资助项目(2012327)

摘　　要：利用1935年、1962年、1979年、2004年这四个年份的海图资料,建立了甬江口及附近海域的数字高程模型(DEM),进而定量计算了不同时段的海床平面冲淤变化、海岸演变和滩槽平面变化。结果表明,在1935-2004年间,甬江口及附近海域总体上以轻微淤积为主,年均淤积速率4.24 cm/a;岸线持续向海推进,潮滩呈淤涨态势,而深槽则趋于萎缩。但冲淤性质在不同时段有所不同,呈现出由冲转淤的调整趋势,这种趋势主要是人为因素作用的结果。With four sea charts of 1935, 1962, 1979 and 2004, the digital elevation models of Yongjiang River mouth and vicinity are built. And then, calculation of variation in erosion-sedimentation of the seabed plane, coastline and foreshore＆amp;deep channels is quantitatively performed. The result indicates that during the period of 1935-2004, the seabed plane is mainly characterized by slight sedimentation at the rate of 4.24 cm/a, along with the coastline advancing, the foreshore silting and the deep channels shrinking. However, the nature of erosion and sedimentation differs from period to period, presenting a trend of change from erosion to deposition. This trend is mainly due to the influence of human impacts.

关 键 词：甬江口 海床平面 滩槽 冲淤变化 

分 类 号：TV142[水利工程—水力学及河流动力学]