| 南汇东滩沉积物粒度特征及其与水动力的关系 |
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| 引用本文： | 黄广,陈沈良,胡静.南汇东滩沉积物粒度特征及其与水动力的关系[J].海洋湖沼通报,2008(1):32-38. |
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| 作者姓名： | 黄广 陈沈良 胡静 |
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| 作者单位： | 华东师范大学河口海岸学国家重点实验室,上海,200062 |
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| 摘 要： | 沉积物粒度参数可以用来反演沉积物沉积的水动力条件和沉积环境。根据对南汇边滩采集的表层沉积物粒度资料进行分析,结果表明:沉积物类型以黏土质粉砂为主;随着沉积物平均粒径Mz的减小,分选逐渐变好,偏态由极正偏向正偏转变,并向近对称接近。运用Pe- jurp的三角图式对沉积环境进行划分,结果表明南汇东滩的水动力条件总体上较强,沉积物粒径总体上偏粗,属于径流—潮流共同作用的河口浅滩沉积环境。对潮流底应力和沉积物临界起动切应力的计算进一步印证了该区水动力较强,对应沉积物颗粒偏粗的现象。
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| 关 键 词： | 南汇东滩 沉积物粒度 水动力 |
| 文章编号： | 1003-6482(2008)01-0032-07 |
| 修稿时间： | 2006年12月22 |
SEDIMENT CHARACTERISTICS AND ITS RELATIONSHIP TO HYDRODYNAMIC ON NANHUI SUBFLUVIAL FLAT |
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| HUANG Guang,CHEN Shenliang,HU Jing.SEDIMENT CHARACTERISTICS AND ITS RELATIONSHIP TO HYDRODYNAMIC ON NANHUI SUBFLUVIAL FLAT[J].Transaction of Oceanology and Limnology,2008(1):32-38. |
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| Authors: | HUANG Guang CHEN Shenliang HU Jing |
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| Abstract: | Sediment size parameters are related to the depositional hydrodynamic conditions associated with the local sedimentary environment.Under the analysis of sediment samples collected on Nanhui subfluvial flat,the result shows that the clayey silt is the main sediment type,the sorting become well and the skewness transforms from very objective to objective with decreasing of the main size of sediment.Furthermore,a triangular diagram advanced by Pejurp was used to subdivide the sedimentary environment,the result shows that the hydro- dynamic on this area is relatively strong and the grain size is generally coarser,and this area belongs to estuarine sedimentary environment influenced by both flow current and tide cur- rent.With the calculation of tidally-induce near bed shear stress and the critical near bed shear stress,the result corresponds well with the phenomena of coarser grain size. |
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| Keywords: | Nanhui subfluvial flat sediment gain size hydrodynamic |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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