| 水动力作用下太湖底泥起动规律研究 |
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| 引用本文： | 李一平,逄勇,陈克森,彭进平,丁玲,金鹰.水动力作用下太湖底泥起动规律研究[J].水科学进展,2004,15(6):770-774. |
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| 作者姓名： | 李一平 逄勇 陈克森 彭进平 丁玲 金鹰 |
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| 作者单位： | 1.河海大学环境科学与工程学院, 江苏, 南京, 210098; |
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| 基金项目： | 国家自然科学基金资助项目(50239030)，江苏省自然科学基金资助项目(BK2002067)~~ |
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| 摘 要： | 在环形水槽内模拟了太湖底泥的起动规律,分析了太湖底泥运动的不同状态,以及上覆水中总磷(TP)浓度随流速的变化关系,实验得出的太湖底泥在3种起动标准下对应的起动流速分别为35、45和60cm/s,并观察到上覆水中TP浓度在3种不同起动流速处出现了较大的跳跃;然后利用泥沙起动的理论模型计算了太湖底泥在3种不同起动标准(个别动、少量动、普遍动)下的起动流速和起动切应力,其值分别为37.9、46.7、59.8cm/s和0.428、0.636、1.042N/m2。两种方法得到的起动流速值比较接近,基本上反映了太湖底泥起动的实际状况。
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| 关 键 词： | 太湖 起动流速 起动拖曳力 底泥起动 起动规律 |
| 文章编号： | 1001-6791(2004)06-0770-05 |
| 收稿时间： | 2003-09-09 |
| 修稿时间： | 2003年9月9日 |
Study on the starting principles of sediment by water force in Taihu lake |
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| LI Yi-ping,PANG Yong,CHEN Ke-sen.Study on the starting principles of sediment by water force in Taihu lake[J].Advances in Water Science,2004,15(6):770-774. |
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| Authors: | LI Yi-ping PANG Yong CHEN Ke-sen |
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| Affiliation: | 1.College of Environment Science and Engineering, Hohai University, Nanjing 210098, China;2.Shandong Water Polytechnic, Rizhao 276825, China;3.College of Transportation and Ocean Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The starting principles of sediment in Taihu lake are simulated in an annular tank,the different stages of sediment movement are analyzed,and the changes of total phosphorus (TP) concentration in upper water with velocity are studied in this paper.The experimental results show that the incipient velocities of sediment in Taihu lake at three different incipient standards (individual movement,ounce movement,universal movement) gained from the lab experiments are 35,45 and 60cm/s respectively,and the observed TP concentration in the upper water varies significantly at the three starting velocities.In this paper,the theoretical sediment starting model is also used to calculate the incipient velocity and the incipient shear stress of Taihu lake at three different starting standards.The calculated values are 37.9,46.7,59.8 cm/s and 0.428,0.636 and 1.042 N/m2,respectively.It can be concluded that the starting velocities gained from the lab experiments and the model simulation are fairly applicable,which can basically reflect the actual starting state of sediment in Taihu lake. |
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| Keywords: | Taihu lake starting velocity incipient shear stress releasing from sediment starting principle |
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