| 黑河流域地下水同位素年龄及可更新能力研究 |
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| 引用本文： | 阮云峰,赵良菊,肖洪浪,周茅先,程国栋.黑河流域地下水同位素年龄及可更新能力研究[J].冰川冻土,2015,37(3):767-782. |
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| 作者姓名： | 阮云峰 赵良菊 肖洪浪 周茅先 程国栋 |
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| 作者单位： | 1. 中国科学院 寒区旱区环境与工程研究所 内陆河流域生态水文重点实验室, 甘肃 兰州 730000;2. 中国科学院 寒区旱区环境与工程研究所 冻土工程国家重点实验室, 甘肃 兰州 730000;3. 中国科学院大学, 北京 100049 |
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| 摘 要： | 通过对黑河流域地下水的放射性同位素如氚(T)和14C的测定, 对该流域浅层和深层地下水的年龄以及其更新速率进行了估算. 结果表明: 整体上看, 从黑河流域的上游、中游至下游, 浅层和深层地下水年龄逐渐增加, 地下水更新速率也逐渐增大. 其中, 黑河上游浅层和深层地下水平均更新速率分别为1.96%·a-1和1.76%·a-1, 可更新能力最强; 中游浅层和深层地下水平均更新速率为1.25%·a-1和0.68%·a-1, 可更新能力次之; 下游浅层和深层地下水平均更新速率分别为0.74%·a-1和0.18%·a-1, 可更新能力最差. 黑河流域不同地带地下水由于循环条件的不同, 浅层和深层地下水年龄存在较大的差异. 其中, 中游山前平原补给条件较好, 浅层和深层地下水年龄较小; 中、下游远离河道地区浅层和深层地下水补给条件差, 显示了更老的年龄. 黑河流域埋深40 m以上的浅层地下水平均更新速率(1.13%·a-1)高于埋深40~100 m之间的中层地下水(0.65%·a-1)以及埋深100 m以下深层地下水(0.55%·a-1). 因此, 在黑河流域地下水开发过程中要合理开发浅层地下水, 适当缩减开发深层地下水.
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| 关 键 词： | 放射性同位素 地下水年龄 可更新能力 黑河流域 |
| 收稿时间： | 2015-01-18 |
| 修稿时间： | 2015-05-10 |
The groundwater in the Heihe River basin: isotope age and renewability |
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| RUAN Yunfeng,ZHAO Liangju,XIAO Honglang,ZHOU Maoxian,CHENG Guodong.The groundwater in the Heihe River basin: isotope age and renewability[J].Journal of Glaciology and Geocryology,2015,37(3):767-782. |
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| Authors: | RUAN Yunfeng ZHAO Liangju XIAO Honglang ZHOU Maoxian CHENG Guodong |
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| Institution: | 1. Key Laboratory of Ecohydrology of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;2. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;3. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Radioactive isotopes such as T and 14C were used to estimate the ages of groundwater, shallow and deep, as well as the renewal rates of groundwater in the Heihe River basin. The results showed that the ages and renewal rates of both shallow and deep groundwater increase gradually from the upper reaches to the middle and then the lower reaches as a whole, with the maximum mean renewal capacity of 1.96%·a-1 and 1.76%·a-1 for shallow and deep groundwater, in the upper reaches, respectively, and followed by 1.25%·a -1 and 0.68%·a -1 in the middle reaches, respectively, finally by 0.74%·a-1 and 0.18%·a -1 in the lower reaches, respectively. Based on the difference in the condition of water cycle in the Heihe River basin, large difference was found between the groundwater ages of shallow groundwater and deep groundwater. For example, piedmont plains in the middle reaches have younger groundwater age due to the better recharge condition, and the groundwater which is far away from the river channel in the middle and lower reaches has older age. The mean renewal rate of shallow groundwater at 0~40 m depth (1.13%·a -1) is higher than that of medium layer at 40~100 m depth (0.65%·a -1) and that of deep layer below 100 m depth (0.55%·a -1). Therefore, exploiting groundwater should be rationally controlled from the shallow layers and exploiting deep groundwater should be reduced properly. |
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| Keywords: | radioactive isotopes groundwater age renewability Heihe River basin |
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