自然资源学报 ›› 2014, Vol. 29 ›› Issue (11): 1859-1868.doi: 10.11849/zrzyxb.2014.11.005

• 资源评价 • 上一篇    下一篇

基于氚和CFCs的三江平原浅层地下水更新能力估算

张兵1,2, 宋献方2, 张应华2, 韩冬梅2, 杨丽虎2, 唐常源3   

  1. 1. 天津市水资源与水环境重点实验室, 天津师范大学, 天津300387, 中国;
    2. 陆地水循环及地表过程重点实验室, 中国科学院地理科学与资源研究所, 北京100101, 中国;
    3. 日本千叶大学, 千叶263-8522, 日本
  • 收稿日期:2013-11-14 修回日期:2014-03-26 出版日期:2014-11-20 发布日期:2014-11-20
  • 作者简介:张兵(1983-),男,湖北枣阳人,助理研究员,博士,研究方向为水资源与水环境。E-mail:zhangbingcn@126.com
  • 基金资助:

    中国科学院知识创新工程(KZCX2-YW-Q06-1);国家自然科学基金重点项目(40830636)。

Estimation of Groundwater Renewal Rate by Tritium and Chlorofluorocarbons in Sanjiang Plain

ZHANG Bing1,2, SONG Xian-fang2, ZHANG Ying-hua2, HAN Dong-mei2, YANG Li-hu2, TANG Chang-yuan3   

  1. 1. Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China;
    2. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    3. Faculty of Horticulture, Chiba University, Chiba 263-8522, Japan
  • Received:2013-11-14 Revised:2014-03-26 Online:2014-11-20 Published:2014-11-20

摘要:

论文通过对三江平原浅层地下水年龄的测定,研究了地下水的来源与更新能力。在井深小于60 m的钻孔中,采集了11 组浅层地下水样,分别测定水中放射性同位素氚(T)和氟利昂(CFCs),根据活塞模型,分别计算出浅层地下水的年龄。分析结果表明,三江平原浅层地下水中氚同位素含量为1.7~61.2 TU;CFC-12 和CFC-113 浓度分别是0.04~1.25 pmol·kg-1 和0.1~0.71 pmol·kg-1。根据氚同位素含量估算的浅层地下水年龄范围是39~51 a;CFC-12 浓度估算的浅层地下水年龄范围为38.2~61.7 a。两种测年数据都表明,浅层地下水缺失了0~39 a 的年轻水,这暗示三江平原的地下水主要接受外源水的补给,深循环地下水越流补给地表水并形成湿地,最终补给到河流之中,地下水有稳定的补给源,可以适当地进行开发和利用。

关键词: 水文地质学, 氚同位素, 更新能力, 浅层地下水年龄, 氟利昂CFCs, 三江平原

Abstract:

The groundwater renewal ability is the basis for the rational development and utilization of groundwater resources, as well as the important factor to the grain production in Sanjiang Plain. The analyses of the shallow groundwater ages were conducted to study the recharge source of the groundwater and the renewable ability during 10th-17th, September 2009. There are 11 shallow groundwater samples were collected from the less than 60 m deep wells along Heilongjiang River, Songhua River and Wusuli River. The shallow groundwater samples were analyzed for concentrations of tritium (T) and chlorofluorocarbons (CFCs) by Quantulus 1220 and GC-ECD, respectively. The groundwater ages were calculated by the tritium and CFCs contents with piston flow model, respectively. The results show that the tritium content in shallow groundwater ranged from 1.7-61.2 TU. While, the CFC-12 and CFC-113 concentrations ranged from 0.04-1.25 pmol·kg-1 and 0.1-0.71 pmol·kg-1, respectively. The shallow groundwater age ranged from 39-51 years according to the contents of tritium. Meanwhile, the CFC-12 apparent groundwater age ranged from 38.2-61.7 years. The shallow groundwater with age less than 39 years was missing according to the tritium and CFCs data, indicating that the groundwater mainly recharged from the allogenic water in Sanjiang Plain. The percolating water from the water deep circulation recharges the surface water, forms to the wetland, and discharges to river finally. The groundwater table monitoring data shows that the groundwater table was the least in June since the agricultural irrigation. However, the groundwater table increased to the elevation before irrigation in September. The groundwater renewable ability also shows that there is stable recharge source in Sanjiang Plain. Consequently, the groundwater could be explored and utilized appropriately to increase the farmland, and to enhance the sustainable agricultural development in Sanjiang Plain.

Key words: hydrogeology, tritium, renewal rate, shallow groundwater age, chlorofluorocarbons, Sanjiang Plain

中图分类号: 

  • P641.8