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长江口崇明东滩盐沼前缘地带悬浮泥沙横向通量的潮周期变化
引用本文:王初,贺宝根,周乃晟,许世远.长江口崇明东滩盐沼前缘地带悬浮泥沙横向通量的潮周期变化[J].海洋学报,2009,31(1):143-151.
作者姓名:王初  贺宝根  周乃晟  许世远
作者单位:1.华东师范大学, 河口海岸学国家重点实验室, 上海, 200062;华东师范大学, 资源与环境科学学院, 上海, 200062
基金项目:国家自然科学基金资助项目(4057101240571006);;国家自然科学基金重点资助项目(40730526);;华东师范大学河口海岸学国家重点实验室开放基金资助项目(SKLEC0510)
摘    要:对长江口崇明东滩盐沼边缘及邻近光滩处的水深、流速和悬沙含量的潮周期变化过程进行了现场实测,并对横向悬沙通量进行了计算和分析。研究结果表明,在平静天气条件下光滩和盐沼上的流速过程有明显差异,植被缓流作用在落潮期更为显著,流速在涨潮由光滩向盐沼不断增大。与涨潮流速优势相对应,涨潮期平均悬沙含量是落潮期的1.8倍。横向悬沙通量以向岸输移为主,悬沙总通量与潮次内最大水深的四次方呈显著正相关。在平静天气条件下潮汐作用控制着盐沼前缘地带泥沙输移水平,盐沼滩面保持稳定淤积,前缘光滩淤积速率高于盐沼处的,盐沼逐渐向海延伸。在大风天气条件下潮次内的流速和悬沙含量水平提高了数倍,悬沙输移量大增,净输移仍以向岸方向为主,在盐沼上部和前缘光滩均可能在短期内发生大量淤积。

关 键 词:流速    悬沙含量    通量    盐沼    东滩
收稿时间:2008/8/18 0:00:00
修稿时间:2008/11/18 0:00:00

Cross-shore suspended sediment flux in the salt marsh pioneer zone of Chongming eastern beach in the Changjiang Estuary in China
WANG Chu,HE Bao-gen,ZHOU Nai-sheng and XU Shi-yuan.Cross-shore suspended sediment flux in the salt marsh pioneer zone of Chongming eastern beach in the Changjiang Estuary in China[J].Acta Oceanologica Sinica (in Chinese),2009,31(1):143-151.
Authors:WANG Chu  HE Bao-gen  ZHOU Nai-sheng and XU Shi-yuan
Institution:1.State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;Department of Geography, College of Resource and Environmental Science, East China Normal University, Shanghai 200062, China2.Department of Geography, Shanghai Normal University, Shanghai 200234, China3.Department of Geography, College of Resource and Environmental Science, East China Normal University, Shanghai 200062, China
Abstract:Between April 2002 and April 2003,time series measurements of water depth,current velocity and suspended sediment content(SSC) were carried out on the marsh fringe and adjacent mudflat of Chongming eastern beach in the Changjiang Estuary.A cross-shore suspended sediment flux was calculated and analyzed.Under the calm weather condition,different types of the time series of current velocity between a salt marsh and a mudflat were observed during semidiurnal tidal cycles.Marsh vegetation reduced ebb currents,c...
Keywords:current velocity  suspended sediment content  flux  salt marsh  eastern beach  
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