长江中下游湖泊水体氧同位素组成

吴敬禄; 林琳; 曾海鳌; 张恩楼; 羊向东

长江中下游湖泊水体氧同位素组成

1 中国科学院南京地理与湖泊研究所, 南京 210008;
2 中国科学院研究生院, 北京 100039

基金项目:

中国科学院知识创新工程重大项目(cxniglas-A02-15

国家重点基础研究发展规划项目(2002CB412300)

KZCX1-SW-12)

详细信息

作者简介:
吴敬禄(1965-),男,研究员,主要从事湖泊环境地球化学研究,E-mail:w.jinglu@niglas.ac.cn

中图分类号: P597.2
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出版历程
- 收稿日期: 2005-11-11
- 修回日期: 2005-12-14

CHARACTERISTICS OF OXYGEN ISOTOPIC COMPOSITION OF THE LAKES ALONG THE MID-LOWER REACHES OF THE YANGTZE RIVER

1 Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China

摘要

摘要: 通过长江中下游45个湖泊不同季节水体δ¹⁸O分析,对湖泊水体演化过程进行了研究。结果表明,湖泊水体δ¹⁸O主要反映了湖泊水源变化及湖泊水体与长江洪水期/枯水期交替演变的特征关系。受江湖关系随季节变化影响,处于长江中下游中段安徽省境内的巢湖、石塘湖等湖泊各季节水体δ¹⁸O都相对较高,处于上段和下段的鄱阳湖群和太湖湖群湖泊水体δ¹⁸O相对较低。因此,长江中下游上段和下段湖泊水体交换受长江影响较大,中段较小。对不同季节湖泊水体δ¹⁸O比较分析表明,长江对湖泊水体的影响主要在夏季,秋、冬季节湖泊水体稳定。黄盖湖、大冶湖等湖泊夏、秋两季水体δ¹⁸O大幅度变化与长江的水位波动直接有关,在长江洪水期,湖泊与长江相连;在长江枯水期,湖泊与长江分离。玄武湖水体δ¹⁸O的大变幅是人为换水造成的。
- 氧同位素 /
- 湖泊 /
- 江湖关系 /
- 长江中下游
Abstract: Pollution and eutrophication are the severe environmental problems lakes along the mid-lower reaches of the Yangtze River are faced with. Recently oxygen isotope of the water bodies has been widely applied to tracing the evolution and sources of the water bodies, transformation among precipitation, surface water and ground water and sources of pollutions.
Based on the analysis of δ¹⁸O in 45 lakes along the mid-lower reaches of the Yangtze River, the evolution process of lake waters was studied. The results show that δ¹⁸O shifts in lake waters reflect the variations of water sources of the lakes, and the relations of alternative evolution between lake waters during flood season and dry season of the Yangtze River. δ¹⁸O values for Chaohu Lake and Shitang Lake in Anhui Province,which lie in the middle mid-lower reaches of the Yangtze River are relatively high, whereas those of Poyang and Taihu Lakes that respectively lie in the upper and lower reaches are much lower due to the influence of water changes in seasons. Therefore, the Yangtze River has much greater effect on the lake water exchanges in the upper and lower reaches than in the middle. By the comparison of δ¹⁸O values in lakes, we conclude that the influence of the Yangtze River on the lakes is obvious during summer months, but lake waters are stable during autumn and winter months. The broad range of δ¹⁸O shifts of Huanggai Lake and Daye Lake during summer and autumn is directly related to the fluctuation of water level of the Yangtze River. The lakes are connected to the Yangtze River during its flood season, whereas they are separated from the river during dry season. Moreover, the great transformation of δ¹⁸O in Xuanwu Lake is caused by artificial water exchange.
- lakes /
- oxygen isotope /
- mid-lower reaches of the Yangtze River

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参考文献(9)

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