| SEDIMENT PROPERTIES AND DYNAMICS IN THE TAIHU LAKE, CHINA |
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| 作者姓名： | Liancong LUO Boqiang QIN Guang GAO Guangwei ZHU Jinshan ZHANG |
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| 作者单位： | Liancong LUO1，Boqiang QIN2，Guang GAO3，Guangwei ZHU4，and Jinshan ZHANG51 Assis. Prof.，2，3Prof.，4 Assoc. Prof.，Nanjing Institute of Geography and Limnology，CAS，Nanjing 210008，China 5 Prof.，Nanjing Institute of Hydrological Sciences，Ministry of Water Resources，Nanjing 210024，China |
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| 基金项目： | 国家自然科学基金，科技部资助项目，中国科学院基金，Director Foundation of Nanjing Institute of Geography and Limnology |
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| 摘 要： | 1 INTRODUCTION Large amounts of nutrients and contaminants such as trace metals are transported into large lakes frominflow rivers and then absorbed onto or associated with fine-grained sediment particles (Sheng and Lick,1979). The nutrients and contamina…
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| 关 键 词： | 中国 太湖 沉积物 沉淀速度 悬浮颗粒 再悬浮 |
| 收稿时间： | 2005-06 |
| 修稿时间： | 2006-01 |
SEDIMENT PROPERTIES AND DYNAMICS IN THE TAIHU LAKE, CHINA |
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| Liancong LUO Boqiang QIN Guang GAO Guangwei ZHU Jinshan ZHANG.SEDIMENT PROPERTIES AND DYNAMICS IN THE TAIHU LAKE, CHINA[J].International Journal of Sediment Research,2006,21(4):312-320. |
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| Authors: | Liancong LUO Boqiang QIN Guang GAO Guangwei ZHU Jinshan ZHANG |
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| Abstract: | Time-series measurements of wave, current and suspended sediment concentration (SSC) weremade at three sites (Sites 1-3) and sediment samples were collected at different locations (Sites 4-7)in Lake Taihu. The significant wave height, length and period during the observation were 0.155 m,3.45 m and 1.9 s and the mean current speed was 0.08 m/s. The size distribution results show thatthe sediment is well sorted, coarse-skewed and very leptokurtic in the upper 10 cm and clay andfine silt can account for more than 70 % of the total within this depth. The median size remainsconstant vertically in the top 10 cm in the eastern, southern, and northern areas of the lake, butchanges significantly in the eastern area resulting from the short retention time of water in this area.The realistic settling velocity of suspended particles varies in the range of 0.01~0.05 cm s-1 andthey sink in a flocculated form rather than individually. Based on a simple mass flux model, thesediment erosion rate was estimated to range between 10-7 and 10-5 kg/m2.s. The results in thisstudy can be a great contribution to the development of a sediment transportation model in LakeTaihu. |
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| Keywords: | Sediment Resuspension Erosion rate Settling velocity Lake Taihu |
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