| 强弱风浪扰动下太湖的营养盐垂向分布特征 |
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| 引用本文： | 朱广伟,秦伯强,高光.强弱风浪扰动下太湖的营养盐垂向分布特征[J].水科学进展,2004,15(6):775-780. |
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| 作者姓名： | 朱广伟 秦伯强 高光 |
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| 作者单位： | 中国科学院南京地理与湖泊研究所, 江苏, 南京, 210008 |
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| 基金项目： | 国家自然科学基金资助项目(40203007，40071019)，中国科学院知识创新工程重大项目(KZCX1 SW 12)~~ |
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| 摘 要： | 在一次风速12m/s的强风浪过程中及在连续多天弱风浪之后,对太湖梅梁湾一浅水区营养盐、悬浮物等的垂向分布进行了观测和分析。结果表明,在水底沉积物约20cm的情况下,强风浪期间与弱风浪期间相比,湖水中悬浮物浓度提高了10倍,总磷浓度提高了3 6倍。而强风浪期间与弱风浪期间的水体溶解性总磷(DTP)、溶解性活性磷(SRP)的浓度无显著差异。说明尽管强风浪过程引起沉积物大量悬浮,水体悬浮颗粒态营养盐显著增高,但是由于悬浮过程营养盐释放与沉降机制作用十分复杂,活性营养盐的浓度未必能提高。无论强风浪还是弱风浪期间,水体的表层至水土界面上50cm层的悬浮物浓度、营养盐浓度没有明显的分层现象,但明显低于水土界面上50cm内的悬浮物浓度和总磷浓度。无论是强风浪期间还是弱风浪期间,表层到底层水体SRP浓度无显著差异。
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| 关 键 词： | 风浪 浅水湖泊 水动力 磷 悬浮物 太湖 |
| 文章编号： | 1001-6791(2004)06-0775-06 |
| 收稿时间： | 2003-09-26 |
| 修稿时间： | 2003年9月26日 |
Vertical distribution of the concentrations of phosphorus and suspended solid in Taihu lake affected by wind-induced wave |
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| ZHU Guang-wei,QIN Bo-qiang,GAO Guang.Vertical distribution of the concentrations of phosphorus and suspended solid in Taihu lake affected by wind-induced wave[J].Advances in Water Science,2004,15(6):775-780. |
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| Authors: | ZHU Guang-wei QIN Bo-qiang GAO Guang |
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| Institution: | Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China |
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| Abstract: | The vertical distribution of total phosphorus (TP),the dissolved total phosphorus (DTP),the soluble reactive phosphorus (SRP),the suspended solid (SS) and its loss on ignition (LOI) in Taihu lake,a large,shallow,eutrophic lake,was observed in a strong wind course (with the wind speed of 12 m/s) and a light breeze course (with the wind speed of 3 m/s).The water depth of the observed site was 1.9 m.The concentrations of TP,DTP,SRP and SS at 10,90,140,and 190 cm below the water surface were monitored.The water-column mean concentration of SS in strong wind period was 468.8 mg/L±302.1 mg/L,which is 10 times higher than that in light breeze period,and the concentration of TP was 0.296 mg/L±0.081 mg/L,which is 3.6 times higher than that in light breeze period.However,the difference of the concentrations of DTP and SRP between strong wind period and light breeze period was insignificant 1 Additionally,both in the strong wind period and in the light breeze period,concentrations of SS and TP were insignificantly different among those in the upper three layers,and lower than those in the bottom layer.However,the concentrations of SRP were insignificantly different in the whole water column.The results indicate that,wind-induced wave not only cause the drastic sediment resuspension and the nutrient releasing,but also result in the absorption of dissolved reactive phosphorus.The sediment resuspension may not increase,but decrease the amount of the bio-available phosphorus in the water column. |
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| Keywords: | shallow lake hydrodynamics phosphorus resuspension Taihu lake |
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