| 天目湖热力学状况的监测与分析 |
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| 引用本文： | 张运林,陈伟民,杨顶田,黄文钰,江晶.天目湖热力学状况的监测与分析[J].水科学进展,2004,15(1):61-67. |
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| 作者姓名： | 张运林 陈伟民 杨顶田 黄文钰 江晶 |
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| 作者单位： | 1.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： | 中国科学院知识创新工程重大项目(KZCX1 SW 12，KZCX2 311)~~ |
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| 摘 要： | 根据2001年6月～2002年5月在天目湖进行的每月一次的全湖水温观测以及2002年5月25～26日在1号点的定点24h连续水温观测资料,分析研究了天目湖水温时空分布、垂直分布、温跃层的形成与变化以及湖泊热力学对溶解氧、营养盐的影响,揭示了各自的基本变化规律。结果表明:天目湖水温的日变化、年变化及垂直分布明显,而其水平差异不大;温跃层随着季节的变化而呈现增强-稳定-减弱-消失的周期变化;水温的变化以及温跃层的存在引起了水中溶解氧以及营养盐的变化。
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| 关 键 词： | 天目湖 时空分布 垂直分布 温跃层 监测 |
| 文章编号： | 1001-6791(2004)01-0061-07 |
| 收稿时间： | 2002-11-09 |
| 修稿时间： | 2002年11月9日 |
Monitoring and analysis of thermodynamics in Tianmuhu Lake |
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| ZHANG Yun-lin.Monitoring and analysis of thermodynamics in Tianmuhu Lake[J].Advances in Water Science,2004,15(1):61-67. |
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| Authors: | ZHANG Yun-lin |
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| Institution: | 1.Nanjing Institute of geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, China;2.Graduate School of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | Based on the in situ investigation data obtained during the period from June in 2001 to May in 2002 in Tianmuhu Lake,the paper analyzes the vertical and spatial distribution and yearly and daily variations of water temperature,and reveals the distribution and variation of thermocline and the relationship between water temperature and dissolved oxygen and nutrient.The results suggest that the hourly maximum temperature of surface water of Tianmuhu Lake occurs between 14:00 and 19:00 and the hourly minimum temperature of surface water occurs between 0:00 and 8:00.The yearly variation of water temperature is summer > spring,autumn > winter and with a maximum value in July or August and a minimum value in January or February.There exits obvious temperature difference between surface and deep layer water in spring,summer and autumn.Thermocline turns up from March to October,and strongthens from March to May,then weakens from September to October.The variation of water temperature has an obvious effect on the values of dissolved oxygen and the concentration of nutrient.When the thermocline is found in the lake,the value of dissolved oxygen on surface is less than that of the deep layer.However,when the thermocline disappears,the difference between surface and deep layer is minor.Moreover,the thermocline prevents the nutrient exchange between the surface and the deep layer water. |
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| Keywords: | Tianmuhu Lake time and spatial distribution vertical distribution thermocline thermody namics monitoring |
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