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| 太湖沉积物再悬浮模拟方法 | |
| 引用本文： | 尤本胜,王同成,范成新,朱龙喜,钟继承,李宝,尹洪斌,胡春华.太湖沉积物再悬浮模拟方法[J].湖泊科学,2007,19(5):611-617. |
| 作者姓名： | 尤本胜 王同成 范成新 朱龙喜 钟继承 李宝 尹洪斌 胡春华 |
| 作者单位： | 1. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008;中国科学院研究生院,北京,100049 2. 河海大学环境科学与工程学院,南京,210098 3. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室,南京,210008 4. 江苏省水文水资源勘测局无锡分局,无锡,214031 |
| 基金项目： | 国家自然科学基金 , 中国科学院知识创新工程项目 |
| 摘 要： | 由于风浪对浅水湖泊底泥的强烈扰动作用,底泥再悬浮的生态效应研究成为目前国际研究热点之一.但方法的缺乏极大地限制了有关底泥再悬浮环境效应的深入研究.本研究应用一种新的沉积物再悬浮装置,模拟了太湖南部长兜港水域不同风浪影响下悬浮物的垂向分布,获得水柱总悬浮物量(T)与扰动频率(n)的定量关系:T=19.77×exp(n/2.61)-71.7.结合现场实测风情下的水柱总悬浮物量,建立了室内水动力条件、水柱总悬浮物量和现场风情的定量关系.研究2004年10月至2005年10月太湖全年代表性小风、中风及大风与再悬浮装置的扰动频率对应关系,估算了小风、中风和大风常规风情引起的总悬浮物量分别为159、230、425 g/m2.结果表明,模拟获得的太湖悬浮物垂向分布规律与现场状况较为接近,是目前较为适用的浅水水体沉积物再悬浮模拟方法. |
| 关 键 词： | 湖泊沉积物 再悬浮 风浪作用 垂向分布 模拟 发生装置 太湖 湖沉积物 再悬浮 模拟方法 Lake Taihu sediment resuspension method of 水体沉积物 状况 分布规律 结果 估算 对应关系 中风 代表 太湖 水动力条件 风情 现场实测 结合 定量关系 |
| 收稿时间： | 2006-10-26 |
| 修稿时间： | 2007-01-22 |
Quantitative simulative method of sediment resuspension in Lake Taihu |
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| YOU Bensheng,WANG Tongcheng,FAN Chengxin,ZHU Longxi,ZHONG Jicheng,LI Bao,YIN Hongbin and HU Chunhua.Quantitative simulative method of sediment resuspension in Lake Taihu[J].Journal of Lake Science,2007,19(5):611-617. | |
| Authors: | YOU Bensheng WANG Tongcheng FAN Chengxin ZHU Longxi ZHONG Jicheng LI Bao YIN Hongbin and HU Chunhua |
| Institution: | State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China;Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China,College of Environment Science and Engineering, Hohai University, Nanjing 210098, P. R. China,State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China,Wuxi Branch, Jiangsu Hydrology-Water Resources Survey Bureau, Wuxi 214031, P. R. China,State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China;Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China,State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China;Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China,State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China;Graduate School of Chinese Academy of Sciences, Beijing 100049, P. R. China and State Key Lab. of Lake Science and Environments, Nanjing Institute, of Geography and Limnology, CAS, Nanjing 210008, P. R. China |
| Abstract: | Concerns on ecological effects of sediment resuspension are on the rise because the sediments in shallow lakes are frequently disturbed by winds.However,few methods could be suitable for supporting its related study. In this paper,Y-shape apparatus for simulating sediment resuspension was used to study vertical distribution of sus- pended sediments in water column and their total suspended amounts driving by different wind speed in Chang- dougang Harbor,southern Lake Taihu.The results showed that the relationship between the total suspended amount of sediments in water column(T)and the motor rotation frequency(n)could be expressed by T=19.77 exp(n/ 2.61)-71.7.Based on the total suspended amounts in water column under field wind conditions,quantitative re- lationships were achieved among the simulated hydrodynamic conditions,the total suspended amounts of sediments and the field wind conditions.According to the correspondent frequency of motor rotation to field wind speed in Lake Taihu from October 2004 to October 2005,the total suspended amounts of sediments were estimated at 159, 230 and 425 g/m~2 for field light,moderate and strong winds,respectively.The estimated amounts,together with the vertical distribution of suspended sediments in water column,were consistent with those observed under field conditions.The Y-shape apparatus was thus recommended for use in studying the ecological effects of sediment re- suspension in shallow aqueous system. |
| Keywords: | Sedimenti resuspension wind effect vertical distribution simulation apparatus Lake Taihu |
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