| Analysis of influencing factors on fine sediment flocculation in the Changjiang Estuary |
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| 作者姓名： | Jiang Guojun Yao Yanming Tang Ziwen |
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| 作者单位： | Jiang Guojun，Yao Yanming，Tang Ziwen1. Harbor Coast & Near Ocean Engineering Institute of Zhejiang University，Hangzhou 310028，China |
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| 基金项目： | The study was supported by the National Natural Science Foundation of China under contract No. 49976023，the Natural Science Foundation of Zhejiang Province under contract No. N29985. |
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| 摘 要： | Based on the test data in dynamic water and static water, the main factors, which influence the fine sediment flocculation, are analyzed with a gray model method of correlation theory. It is shown that the main influencing factors are water temperature, settling time, salinity, grain size, sediment concentration and current velocity according to the correlation coefficients. Among them, the salinity and the sediment grain size are critical type influencing factors (CrTIF); the settling time, the sediment concentration and the velocity are continuous type influencing factors (CoTIF); and the water temperature has the characteristics of both. When the critical values of CrTIF are reached or exceeded, the fine sediments will be flocculated, but values of CrTIF will not influence the settlement strength of floes. The influence of CoTIF is continuous. The values of the CoTIF will not only influence the occurrence of flocculation but also the settlement strength of the floes.
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| 关 键 词： | Floc settling influencing factors critical type continuous type correlation analyses |
| 收稿时间： | 2002/1/28 0:00:00 |
| 修稿时间： | 3/2/2002 12:00:00 AM |
Analysis of influencing factors on fine sediment flocculation in the Changjiang Estuary |
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| Jiang Guojun,Yao Yanming,Tang Ziwen.Analysis of influencing factors on fine sediment flocculation in the Changjiang Estuary[J].Acta Oceanologica Sinica,2002,21(3):385-394. |
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| Authors: | Jiang Guojun Yao Yanming and Tang Ziwen |
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| Institution: | Harbor Coast & Near Ocean Engineering Institute of Zhejiang University, Hangzhou 310028, China |
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| Abstract: | Based on the test data in dynamic water and static water, the main factors, which influence the fine sediment flocculation, are analyzed with a gray model method of correlation theory. It is shown that the main influencing factors are water temperature, settling time, salinity, grain size, sediment concentration and current velocity according to the correlation coefficients. Among them, the salinity and the sediment grain size are critical type influencing factors (CrTIF); the settling time, the sediment concentration and the velocity are continuous type influencing factors (CoTIF); and the water temperature has the characteristics of both. When the critical values of CrTIF are reached or exceeded, the fine sediments will be flocculated, but values of CrTIF will not influence the settlement strength of floes. The influence of CoTIF is continuous. The values of the CoTIF will not only influence the occurrence of flocculation but also the settlement strength of the floes. |
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| Keywords: | Floc settling influencing factors critical type continuous type correlation analyses |
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