湘江流域中下游长沙地区不同水体中δ18O、δD的变化

doi:10.13249/j.cnki.sgs.2014.04.488

地理科学 ›› 2014, Vol. 34 ›› Issue (4): 488-495.doi: 10.13249/j.cnki.sgs.2014.04.488

湘江流域中下游长沙地区不同水体中δ¹⁸O、δD的变化

吴华武^1,²(), 章新平¹(), 李小雁², 李静^3,⁴, 张剑明⁵

1.湖南师范大学资源与环境科学学院,湖南长沙 410081
2.北京师范大学资源学院,北京 100875
3.中国科学院地理科学与资源研究所,北京100101
4.中国科学院大学,北京100049
5.湖南省株洲市气象局,湖南株洲 412000

收稿日期:2013-01-02 修回日期:2013-04-28 出版日期:2014-04-10 发布日期:2014-04-10
作者简介:
作者简介:吴华武(1986-),男,江西九江人,博士研究生,主要从事气候变化与水文同位素方面研究。E-mail:wuhuawu416@163.com
基金资助:
国家自然科学基金项目(41171035)、湖南省十二五重点学科建设项目(2012001)及中央高校基本科研业务费专项资助

The Variations of δ¹⁸O and δD in Different Water Bodies of Changsha Region, Middle-and-Low Reach of the Xiangjiang River

Hua-wu WU^1,²(), Xin-ping ZHANG¹(), Xiao-yan LI², Jing LI^3,⁴, Jian-ming ZHANG⁵

1.College of Resources and Environment Sciences, Hunan Normal University, Changsha, Hunan 410081, China
2.College of Resources Science and Technology, Beijing Normal University, Beijing 100875,China
3.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
4.University of Chinese Academy of Sciences, Beijing 100049, China
5.Zhuzhou Meteorological Bureau, Zhuzhou, Hunan 412000, China

Received:2013-01-02 Revised:2013-04-28 Online:2014-04-10 Published:2014-04-10

摘要/Abstract

摘要：

根据2010年在长沙地区所收集的降水、河水、泉水和井水水样资料,分析了取样期间不同水样稳定同位素的变化特征,并结合湘江长沙段水位和相关气象资料,揭示了降水中δ¹⁸O、δD因水汽来源不同而其表现出冬半年高、夏半年低的特点;由于降水降落于地表后,地表对降水滞留作用而使得河水、泉水和井水中δ¹⁸O、δD的波动幅度明显小于降水中δ¹⁸O的波动幅度;在汛期,河水中δ¹⁸O算术平均值大于降水,在枯水期河水中δ¹⁸O比泉水和井水中δ¹⁸O要大;河水线(RWL)的斜率和截距与全球大气水线(GMWL)比较接近,说明该地区位于季风区河流的补给主要来自大气降水,井水线(WWL)的斜率和截距比泉水线(SWL)要小,这表明降水入渗形成井水过程中经历的蒸发作用要比形成泉水要强,井水补给比泉水补给要复杂。这为今后研究该地区地表水-地下水-大气降水之间转换关系提供了科学依据,对掌握“三水”间转换规律和合理开发利用水资源具有重要的意义。

关键词: δ18O, δD, 大气降水, 河水, 泉水, 井水

Abstract:

Based on the collected water samplings of precipitation, river, spring and well water during the whole year of 2010 in Changsha region, the variation characteristics of δ¹⁸O, δD in different water samples were investigated combining with the related meteorological parameters and water-level data of Changsha region, the Xiangjiang River. It revealed that the isotopic compositions (δ¹⁸O and δD) had a high values in winter year and a low values in summer year due to different moist sources. The fluctuations of isotopic compositions (δ¹⁸O and δD) in river, spring, and well water were slower than in precipitation due to retention effect after the precipitation descends to the surface. The arithmetic average δ¹⁸O value in river water was larger than in precipitation during the flood period and in spring and well water during the dry period. The slope and intercept of river water line (RWL) was closely to the global meteoric water line (GMWL), suggesting that the river recharge mainly originating from the precipitation in the monsoon region. The slope and intercept of well water line (WWL) was lower than the spring water line (SWL), indicating that the infiltration process of precipitation into well water had experienced stronger evaporation effect than the process into spring water, which is due to the complex recharge sources between well water and spring water. This may provide a scientific foundation for the future investigation of the conversion correlation among the surface water, groundwater and precipitation in this region. It has vital significance for understanding the three-water conversion correlation pattern and properly exploiting and utilizing water source.

Key words: δ18O, δD, precipitation, river water, spring water, well water

中图分类号:

P339

吴华武, 章新平, 李小雁, 李静, 张剑明. 湘江流域中下游长沙地区不同水体中δ¹⁸O、δD的变化[J]. 地理科学, 2014, 34(4): 488-495.

Hua-wu WU, Xin-ping ZHANG, Xiao-yan LI, Jing LI, Jian-ming ZHANG. The Variations of δ¹⁸O and δD in Different Water Bodies of Changsha Region, Middle-and-Low Reach of the Xiangjiang River[J]. SCIENTIA GEOGRAPHICA SINICA, 2014, 34(4): 488-495.

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	平均		夏半年		冬半年		季节差
	δ¹⁸O(‰)	δD(‰)	δ¹⁸O(‰)	δD(‰)	δ¹⁸O(‰)	δD(‰)	Δδ¹⁸O(‰)	ΔδD(‰)
降水(*)	-6.43	-53.3	-8.35	-54.5	-5.42	-26.5	-2.93	-28
河水	-5.56	-36	-6.03	-37.1	-5.73	-35.2	-0.3	-1.9
泉水	-6.43	-35.4	-6.32	-34.4	-6.5	-36.2	0.18	1.8
井水	-6.56	-38.3	-6.85	-39.8	-6.32	-37.1	-0.53	-2.7

湘江流域中下游长沙地区不同水体中δ¹⁸O、δD的变化

The Variations of δ¹⁸O and δD in Different Water Bodies of Changsha Region, Middle-and-Low Reach of the Xiangjiang River

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