南黄海辐射沙脊群潮汐水道的悬沙输运特征

徐粲; 高建华; 杨旸; 汪亚平; 高抒

doi:10.3969/j.issn.0253-4193.2014.11.017

南黄海辐射沙脊群潮汐水道的悬沙输运特征

doi: 10.3969/j.issn.0253-4193.2014.11.017

南京大学海岸与海岛开发教育部重点实验室, 江苏南京 210093

基金项目: 海洋公益性行业科研专项经费项目"南黄海辐射沙脊群空间开发利用及环境生态评价技术"(2010418006);江苏省科技计划项目基础研究计划重点研究专项(SBK201150144);海洋沉积物与环境地质国家海洋局重点实验室开放基金(MASEG201205);江苏省自然科学基金(BK2012315)。

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出版历程
- 收稿日期: 2013-04-18

Suspended sediment transport patterns in the tidal channels in the southwestern Yellow Sea

Key Laboratory of Coast and Island Development of Ministry of Education, Nanjing University, Nanjing 210093, China

摘要

摘要: 根据南黄海辐射沙脊群定点站位的流速和浊度数据,利用通量分解方法,分析了潮汐水道的悬沙输运特征和输运机制。结果表明,辐射沙脊群海域潮汐水道中潮流为往复流,悬沙浓度较高,属于强潮流控制的悬沙浓度相对较高的陆架浅海环境;悬沙输运主要受欧拉余流和潮汐捕捉效应控制,再悬浮的沉积物通过平流作用进行输运。其中,陈家坞槽和西洋水道的悬沙输运以潮汐捕捉效应占优,沉积物向潮汐水道外输运,处于冲刷状态;苦水洋水道以欧拉余流输运为主,水道内的再悬浮的沉积物在强潮流作用下向陆输运,主要堆积在蒋家沙和西洋西侧岸滩等浅滩和潮间带上。由此可见,在陆源物质供应减少背景下,南黄海辐射沙脊群内部的物质充当了新的物源,短期内能够维持近岸潮滩和沙脊的持续增长。
- 沉积物输运 /
- 通量分解 /
- 欧拉余流 /
- 悬沙浓度 /
- 临界起动流速 /
- 辐射沙脊群
Abstract: Based on the measured current velocities and suspended sediment concentration data for the tidal channels between the radial sand ridges in the southwestern Yellow Sea,this study analyzed the mechanism of suspended sediment transport in the channels. The flow in the study area was rectilinear,and the suspended sediment concentration was relatively high. The decomposition of sediment fluxes suggested that the Eulerian effect and tidal trapping were the main factors affecting suspended sediment transport. In the Chenjiawu and Xiyang tidal channels,tidal trapping was a dominant mean for suspended sediment transport,and sediments were entrained from the channels by tides,which indicated the existence of the process of seabed scour. In contrast,the main controlling factor for suspended sediment transport in the Kushuiyang channel was the Eulerian effect,and the resuspended sediments were transported towards onshore by the strong tide flow and then piled up at Jiangjiasha and over shoal or intertidal areas on the western coast of Xiyang. Thus,under the circumstances for reducing terrigenous material input,sediments in the radial sand ridges became a new source of material supply and played an important role on the continued accretion of the sand ridges and the adjacent tidal flats.
- sediment transport /
- flux decomposition /
- Euler residual current /
- suspended sediment concentration /
- threshold for sediment motion /
- radial sand ridges

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参考文献(35)

王颖. 黄海陆架辐射沙脊群[M]. 北京: 中国环境科学出版社, 2002.

张忍顺, 陈才俊. 江苏岸外沙洲演变与条子泥并陆前景研究[M]. 北京: 海洋出版社, 1992.

汪亚平, 张忍顺. 江苏岸外沙脊群的地貌形态及动力格局[J]. 海洋科学, 1998(3):43-47.

黄惠明, 王义刚, 尚进, 等. 冬季苏北辐射沙洲水域悬沙分布及输运特征分析[J]. 河海大学学报(自然科学版), 2011,39(2):201-205.

吴德安, 马林艺. 江苏辐射沙洲水道含沙量变化动力响应[J]. 泥沙研究, 2010(5):32-40.

刘运令, 汪亚平, 吴祥柏, 等. 南黄海苏北近岸西洋水道水沙输运机制分析[J]. 海洋科学, 2011,35(11):120-127.

邢飞, 汪亚平, 高建华, 等. 江苏近岸海域悬沙浓度的时空分布特征[J]. 海洋与湖沼, 2010,41(3):459-468.

Xing F, Wang Y P, Wang H V. Tidal hydrodynamics and fine-grained sediment transport on the radial sand ridge system in the southern Yellow Sea[J]. Marine Geology, 2012:291-294:192-210.

任美锷. 江苏省海岸带和海涂资源综合调查报告[M]. 北京: 海洋出版社, 1986.

乔方利. 中国区域海洋学－物理海洋学[M]. 北京: 海洋出版社, 2012:89,117.

程珺, 高抒, 汪亚平, 等. 苏北近岸海域表层沉积物粒度及其对环境动力的响应[J]. 海洋地质与第四纪地质, 2009,29(1):7-12.

傅命佐, 朱大奎. 江苏岸外海底沙脊群的物质来源[J]. 南京大学学报(自然科学版), 1986,22(3):536-544.

王腊春, 陈晓玲, 储同庆. 黄河、长江泥沙特性对比分析[J]. 地理研究, 1997,16(4):72-80.

Dyer K R. Estuarine-A Physical Introduction[M]. New York: John Wiley and Stons, 1997.

汤毓祥. 潮汐余流研究简况[J]. 黄渤海海洋, 1987,5(3):73-80.

Tee K T. Tide-induced residual current-verification of a numerical model[J]. Journal of Physical oceanography, 1977,7:396-402.

Biron P M, Lane S N, Roy A G, et al. Sensitivity of bed shear stress estimated from vertical velocity profiles: the problem of sampling resolution[J]. Earth Surface Processes and Landforms, 1998,23(2):133-139.

Kabir M R, Torfs H. Comparison of different methods to calculate bed shear stress[J]. Water Science and Technology, 1992,25(8):131-140.

Soulsby R L, Dyer K R. The form of the near-bed velocity profile in a tidally accelerating flow[J]. Journal of Geophysical Research, 1986,86(C9):8067-8074.

汪亚平, 高抒, 贾建军. 海底边界层水流结构及底移质搬运研究进展[J]. 海洋地质与第四纪地质, 2000,20(3):101-106.

王爱军, 汪亚平, 柯贤坤, 等. 潮间带水沙多层位同步测量系统应用的初步研究[J]. 海洋通报, 2003,22(3):61-68.

Gadd P E, Lavelle J W, Swift D J P. Estimate of sand transport on the New York shelf using near-bottom current meter observations[J]. Journal of Sedimentary Petrology, 1978,48(1):239-252.

Miller M C, McCave I N, Komar P D. Threshold of sediment motion under unidirectional currents[J]. Sedimentology, 1977,24(4):507-527.

江苏省908专项办公室. 江苏近海海洋综合调查与评价总报告[R]. 北京: 科学出版社, 2012.

侯庆志, 徐敏, 陆培东. 辐射沙洲南翼"水道-沙洲"系统与西太阳沙的稳定[J]. 海洋科学, 2006,30(6):16-22.

高敏钦. 南黄海辐射沙脊群冲淤变化研究[D]. 南京:南京大学, 2011.

黄海军. 南黄海辐射沙洲主要潮沟的变迁[J]. 海洋地质与第四纪地质, 2004,24(2):1-8.

陈君, 王义刚, 张忍顺, 等. 江苏岸外辐射沙脊群东沙稳定性研究[J]. 海洋工程, 2007,25(1):105-113.

吴曙亮, 蔡则健. 江苏省沿海沙洲及潮汐水道演变遥感分析[J]. 国土资源遥感, 2002,53(3):29-32.

贾建军, 汪亚平, 高抒, 等. 江苏大丰潮滩推移质输运与粒度趋势信息解译[J]. 科学通报, 2005,50(22):2546-2554.

王爱军, 高抒, 贾建军, 等. 江苏王港盐沼的现代沉积速率[J]. 地理学报, 2005,60(1):61-70.

吴德安, 张忍顺, 严以新, 等. 辐射沙洲东大港潮流水道悬沙输移机制分析[J]. 河海大学学报(自然科学版), 2006,34(2):216-222.

李家彪. 中国区域海洋学－海洋地质学[M]. 北京: 海洋出版社, 2012:112.

何华春, 邹欣庆, 李海宇. 江苏岸外辐射沙脊群烂沙洋潮流通道稳定性研究[J]. 海洋科学, 2005,29(1):12-16.