| 基于环境示踪剂氯的北山地区浅部地下水补给研究 |
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| 引用本文： | 李杰彪,苏锐,周志超,郭永海,季瑞利,张明,王洪斌.基于环境示踪剂氯的北山地区浅部地下水补给研究[J].干旱区地理,2020,43(1):135-143. |
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| 作者姓名： | 李杰彪 苏锐 周志超 郭永海 季瑞利 张明 王洪斌 |
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| 作者单位： | 核工业北京地质研究院，中核高放废物地质处置评价技术重点实验室，北京100029 |
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| 基金项目： | 核设施退役及放射性废物治理专项项目（科工二司〔2017〕1405号） |
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| 摘 要： | 地下水补给研究是高放废物深地质处置库选址和场址评价的重要研究内容之一。甘肃北山地区是我国高放废物地质处置库场址首选预选区，为查明该区地下水补给特征，基于环境示踪剂氯查明了北山地区浅部地下水补给量。结果表明：（1） 总体而言，氯质量平衡方法在北山地区应用效果较好。（2） 基于包气带的氯质量平衡方法计算得出的浅部地下水垂向补给量在渗透性较大的沟谷盆地中为0.07~2.03 mm·a-1，平均值约1.0 mm·a-1。（3） 基于饱和带的氯质量平衡方法计算得出北山地区浅部地下水多年平均入渗补给量为0.25 mm·a-1，不足多年平均降水量的0.5%。相关结果可为我国高放废物地质处置库选址和场址评价提供依据。
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| 关 键 词： | 地下水补给 高放废物地质处置 环境示踪剂 氯质量平衡法 |
| 收稿时间： | 2019-05-03 |
Estimation of shallow groundwater recharge using the environmental tracer chloride method in Beishan Area |
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| LI Jie-biao,SU Rui,ZHOU Zhi-chao,GUO Yong-hai,JI Rui-li,ZHANG Ming,WANG Hong-bin.Estimation of shallow groundwater recharge using the environmental tracer chloride method in Beishan Area[J].Arid Land Geography,2020,43(1):135-143. |
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| Authors: | LI Jie-biao SU Rui ZHOU Zhi-chao GUO Yong-hai JI Rui-li ZHANG Ming WANG Hong-bin |
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| Affiliation: | CNNC Key Laboratory on
Geological Disposal of High-level Radioactive
Waste,Beijing Research Institute of Uranium Geology,Beijing 100029,China |
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| Abstract: | Hydrogeological
condition is one of the most important factors in the site selection and site
safety assessment for the disposal of high-level radioactive waste (HLW).
Furthermore, groundwater recharge research is of importance in the study of
hydrogeology. Beishan area in Gansu Province, China is a preselected priority
region for disposal of China’s HLW. Beishan area locate in the north of Hexi
Corridor, Gansu Province, about 70 km south of Yumen Town In order to find out
the groundwater recharge in this area, this paper used the chloride mass
balance (CMB) method in the unsaturated zone as well as the saturated zone. Considering
the thickness and the lithology of the unsaturated zone, the typical profile
and the available fieldwork, four typical profiles were carried out in Beishan
area. They are located in Suanjingzi, Shazaoyuan and Xinchang respectively. In
addition, this experiment successfully collected 45 samples of shallow
groundwater. The groundwater level of most wells are less than 10 meters. The
distribution of the wells is relatively evenly. The result indicated as
follows: (1) In general, the applicability of the CMB method in Beishan area is
good. The groundwater recharge rate ranges from 0.07 mm·a-1 to 2.05 mm·a-1 based on unsaturated
CMB method, where all the profiles were located in the gully basin with
relatively larger permeability. The groundwater recharge rate is approximately
0.26 mm·a-1 based on
saturated CMB method, which accounts for only 0.40% of the average annual
precipitation. (2) The CMB method based on the unsaturated zone is limited where
the background value is high. Therefore, other methods should be considered in
these areas, such as the artificial tracer method, 3H, Br, water-table
fluctuation method, water-budget models method. (3) The chloride concentration
in atmospheric precipitation has a great effect on the results as the
background input data. (4) Due to the complexity and uncertainty of the
groundwater recharge research, it is suggested that other methods should be
studied on the basis of this study, such as artificial tracer method, water-table
fluctuation method, Darcy method, and so on. Through this research, the
groundwater recharge rate in Beishan area was obtained for the first time. These
achievements can be useful for the site selection and site safety assessment of
the HLW repository. Moreover, it can also be helpful for the construction of
the underground laboratory in the future. |
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| Keywords: | groundwater recharge high-level radioactive waste disposal environmental tracer chloride mass balance (CMB) method |
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