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| 北京市城近郊区地下水的环境同位素研究 | |
| 引用本文： | 王新娟,谢振华,李世君,崔亚莉,邵景力.北京市城近郊区地下水的环境同位素研究[J].地学前缘,2006,13(1):205-210. |
| 作者姓名： | 王新娟 谢振华 李世君 崔亚莉 邵景力 |
| 作者单位： | 1. 中国地质大学(北京)水资源与环境学院,北京,100083;北京市地质工程勘察院,水资源研究所,北京,100037 2. 北京市地质工程勘察院,水资源研究所,北京,100037 3. 中国地质大学(北京)水资源与环境学院,北京,100083 |
| 基金项目： | 中国地质调查局地质调查项目 |
| 摘 要： | 应用环境同位素方法,研究北京城近郊区地下水演化规律。沿北京市永定河冲洪积扇地下水流动方向取样15组(D、18O、T、14C及全分析),对所取水样进行D、18O、T、14C分析,并确定地下水同位素年龄。运用地下水14C和T含量在垂向和水平方向变化的结果,验证了地下水的流向并计算了地下水的流速变化范围为5·02~62·63m/a,从山前至平原浅层地下水径流速度逐渐变小,反映了地下水水平径流强度逐渐减弱,地下水交替逐渐变差;浅层孔隙水以垂向交替为主,深层孔隙水以水平径流为主。对地下水D、18O之间的关系进行分析,从而判断地下水的补给来源等。 |
| 关 键 词： | 地下水 环境同位素方法 14C年龄 永定河 |
| 文章编号： | 1005-2321（2006）01-0205-06 |
| 收稿时间： | 2005-10-31 |
| 修稿时间： | 2005-11-21 |
A study of environmental isotopes in groundwaters near the suburbs of Beijing |
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| WANG Xin-juan,XIE Zhen-hua,LI Shi-jun,CUI Ya-li,SHAO Jing-li.A study of environmental isotopes in groundwaters near the suburbs of Beijing[J].Earth Science Frontiers,2006,13(1):205-210. | |
| Authors: | WANG Xin-juan XIE Zhen-hua LI Shi-jun CUI Ya-li SHAO Jing-li |
| Institution: | 1. School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China ;2. Department of Geological Engineering Investigation of Beijing, Beijing 100037, China |
| Abstract: | We have studied the evolution of groundwaters in the Yongding River Plain near the suburbs of Beijing, using stable isotope geochemistry. We collected fifteen groups of samples along the flow direction of groundwater in the pluvial and alluvial fans of the Yongding River. The contents of deuterium, oxygen, tritium and ~14KG-*9]C, were measured, and the ages calculated. By analyzing the changes in the ~14KG-*9]C age and in the content of tritium of the groundwaters along vertical and horizontal directions, we can calculate the flow velocity. The calculated flow velocity ranges from 62.63 m/a to 5.02 m/a. The flow velocity in the superficial aquifer decreases gradually from the piedmont to the plain, as does the shallow subsurface runoff. The groundwater cyclic variations occur mainly vertically in the near-surface aquifer, and horizontally in the deeper aquifer. One of the main tasks of this study is to understand the relationship between the content of deuterium and oxygen in order to judge the origin of the groundwaters. |
| Keywords: | groundwater environmental isotopic method ^ 14C age Yongding River |
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