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| 应用同位素研究黑河下游额济纳盆地地下水 | |
| 引用本文： | 钱云平,林学钰,秦大军,王玲.应用同位素研究黑河下游额济纳盆地地下水[J].干旱区地理,2005,28(5):574-580. |
| 作者姓名： | 钱云平 林学钰 秦大军 王玲 |
| 作者单位： | 1. 北京师范大学环境科学学院,北京,100875;黄河水利委员会水文局,河南,郑州,450004 2. 北京师范大学环境科学学院,北京,100875 3. 中国科学院地质与地球物理研究所,北京,100081 4. 黄河水利委员会水文局,河南,郑州,450004 |
| 基金项目： | 国际原子能机构（IAEA）2003-2004年技术项目（TC Project）（CPR/08/015/）资助. |
| 摘 要： | 黑河下游额济纳盆地位于两北内陆干旱区，大部分地区为戈壁沙漠，降水稀少，蒸发强烈，生态环境脆弱。盆地内天然植被的生长发育主要依靠于区域地下水，研究盆地地下水形成和循环机制，对流域治理、生态环境建设具有重要意义。本文采用环境同位素示踪技术，结合水化学分析方法和区域水文地质条件，研究分析了盆地地下水循环特征、地下水与地表水的相互关系和流域不同地区地下水补给来源等，为黑河下游水利工程规划和水量调度提供科学依据。 |
| 关 键 词： | 黑河 额济纳盆地 稳定同位素 CFC 电导率 地下水来源 |
| 文章编号： | 1000-6060（2005）05-0574-07 |
| 收稿时间： | 2005-01-18 |
| 修稿时间： | 2005-04-19 |
Study on Groundwater of the Ejin Basin at the Lower Reaches of the Heihe River Using Isotopes |
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| QIAN Yun-ping,LIN Xue-yu,QIN Da-jun,WANG Lin.Study on Groundwater of the Ejin Basin at the Lower Reaches of the Heihe River Using Isotopes[J].Arid Land Geography,2005,28(5):574-580. | |
| Authors: | QIAN Yun-ping LIN Xue-yu QIN Da-jun WANG Lin |
| Institution: | 1 Institute of Environmental Science, Beijing Normal University, Beijing 100875,China; 2 Institnte of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China; 3 Hydrology Bureau, Yellow River Conservancy Commission, Zhengzhou 450004, Henan, China |
| Abstract: | Ejin Basin with low precipitation but high evaporation, is located in the lower reaches of the Heihe River in northwest China. Most of the basin is desert where the ecosystems are vulnerable. The growth of vegetations in the basin relies mainly on regional groundwater, and the Heihe River is a main recharge source of groundwater. It is significant to understand the formation and circulation of groundwater for planning water conservancy projects and redistributing water resources in the lower reaches. In this paper, the behaviors of groundwater beneath the Ejin Basin are researched by using hydrochemistry and isotope-tracing technology based on considering the regional hydrogeologic conditions. Hydrochemical and environmental isotopic data are analyzed so as to reveal the interaction between surface water and groundwater and the recharge resources of groundwater in the different regions in the basin. The results show that the distribution characteristics of hydrochemistry and isotopes are different from the different locations because of the different structures of aquifers, formation conditions, recharge resources and flow paths of groundwater beneath the basin. The stable isotopic composition of stream water is similar to that of shallow groundwater near the river channel, and the shallow groundwater is very young based on the tritium and CFC data, these reveal that the properties of shallow groundwater are closely related to the stream water, and groundwater is mainly recharged by the Heihe River rising from the Qilian Mountains. The stable isotopic composition of groundwater beneath Gurinai, where the evaporation is violent, is different from that of stream water and shallow groundwater near the river channel, and the tritium and CFC data show that groundwater here is young, which indicate that groundwater beneath Gurinai could be recharged by local rainfall and from the Badain Jaran Desert. The stable isotopic composition of deep confined groundwater beneath a zone between the Juyan Lake and the China-Mongolia border are very negative, and deep groundwater is old compared with shallow groundwater, these reveal that the renewing capability of groundwater is weak. The research could give some suggestions for the management of water resources in improving environment in the basin. Because of stream water is the main recharge source of groundwater, a considerable discharge of the river must be assured. Some factors have to be considered in planning water conservancy projects, for example, the river realignment should not affect the surface water recharge to groundwater. The renewing capability of deep groundwater is weak, so we have to take into account cautiously in utilizing deep groundwater beneath the basin. |
| Keywords: | the Heihe River Ejin Basin stable isotope CFC electrical conductivity groundwater resources |
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