氡(222Rn)在地下水-地表水相互作用中的应用研究进展

doi:10.13745/j.esf.sf.2022.1.44

地学前缘 ›› 2022, Vol. 29 ›› Issue (3): 76-87.DOI: 10.13745/j.esf.sf.2022.1.44

氡(²²²Rn)在地下水-地表水相互作用中的应用研究进展

廖福¹(), 罗新², 谢月清³, 易立新⁴, 李海龙⁵, 王广才¹^,^*()

1.中国地质大学(北京) 水资源与环境学院暨地下水循环与环境演化教育部重点实验室, 北京 100083
2.香港大学地球科学系, 香港 999077
3.南京大学地球科学与工程学院, 江苏南京 210023
4.南开大学环境科学与工程学院, 天津 300071
5.南方科技大学环境科学与工程学院, 广东深圳 518055

收稿日期:2022-01-17 修回日期:2022-02-16 出版日期:2022-05-25 发布日期:2022-04-28
通讯作者: 王广才
作者简介:廖福(1991—),男,讲师,水文地质学专业,主要从事地下水-地表水相互作用研究工作。E-mail: fuliao@cugb.edu.cn
基金资助:
国家自然科学基金重点项目(42030705)

Advances in 222Rn application in the study of groundwater-surface water interactions

LIAO Fu¹(), LUO Xin², XIE Yueqing³, YI Lixin⁴, LI Hailong⁵, WANG Guangcai¹^,^*()

1. School of Water Resources and Environment & MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences (Beijing), Beijing 100083, China
2. Department of Earth Sciences, University of Hong Kong, Hong Kong 999077, China
3. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
4. College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
5. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China

Received:2022-01-17 Revised:2022-02-16 Online:2022-05-25 Published:2022-04-28
Contact: WANG Guangcai

摘要/Abstract

摘要：

地下水-地表水相互作用是水资源管理和地表水生态系统保护中重要的一个环节,氡同位素(²²²Rn)由于其在地下水与地表水中含量差异显著、性质保守、检测难度低,广泛运用于地下水-地表水相互作用的研究当中。本文通过总结分析²²²Rn在不同地表水体(海水、河水、湖水等)中的应用,指出刻画地下水氡浓度的异质性是估算地下水排泄的重点和难点。在估算海底地下水排泄(SGD)时,氡的混合损失项估算不确定、海水氡浓度时空变异性、SGD的多组分特征等可能给估算结果带来较大不确定性;在估算河流地下水排泄时难以确定氡的大气逃逸量;研究人员对氡在示踪地表水补给地下水方面的研究程度相对不足。本文从科学研究和实际生产方面,对²²²Rn的研究应用提出以下潜在方向:(1)降低地下水氡空间变异性对估算地下水排泄量的影响;(2)针对不同水体、不同水文条件,准确刻画氡的大气逃逸量;(3)拓展²²²Rn示踪能够解决的科学问题;(4)将氡质量平衡模型计算与不确定分析相结合,实现软件化。

关键词: 氡(²²²Rn), 地下水-地表水相互作用, 地下水排泄

Abstract:

Groundwater-surface water interaction is important for water resource management and aquatic ecosystem protection. Radon (²²²Rn) has been widely used in the investigation of groundwater-surface water interaction owing to its application advantages, such as its large concentration difference between groundwater and surface water, noble gas properties, and ease of measurement. In this study, we analyzed ²²²Rn applications in different surface waters (sea, river, lake, etc.) and identified the ²²²Rn concentration variation in groundwater as a key challenge in the estimation of groundwater discharge into surface water. When estimating submarine groundwater discharge (SGD), ²²²Rn mixing loss and its variable concentrations in seawater, and the complexity of SGD components would produce uncertainties in the estimation results. Also, it is difficult to determine ²²²Rn atmospheric loss when estimating riverine groundwater discharge using the ²²²Rn method. Further, little attention has been paid to the application of ²²²Rn in tracing surface water flow into groundwater. Thus, future studies on ²²²Rn application in regarding to groundwater-surface water interaction should focus on (1) reducing final uncertainty in ²²²Rn-based estimation of groundwater discharge due to variable ²²²Rn concentrations in groundwater; (2) accurately characterizing the ²²²Rn atmospheric loss for different surface waters under different hydrological conditions; (3) expanding scientific applications of the ²²²Rn method; and (4) developing a software that integrates the ²²²Rn mass balance model and uncertainty analysis.

Key words: radon (²²²Rn), groundwater-surface water interaction, groundwater discharge

中图分类号:

P641.12

廖福, 罗新, 谢月清, 易立新, 李海龙, 王广才. 氡(²²²Rn)在地下水-地表水相互作用中的应用研究进展[J]. 地学前缘, 2022, 29(3): 76-87.

LIAO Fu, LUO Xin, XIE Yueqing, YI Lixin, LI Hailong, WANG Guangcai. Advances in 222Rn application in the study of groundwater-surface water interactions[J]. Earth Science Frontiers, 2022, 29(3): 76-87.

图/表 3

图1 222Rn所处衰变链(238U系列)图绿色文本框中的数字为半衰期。

Fig.1 222Rn Decay chain (238U series)

图2 222Rn在地下水与地表水中的源汇项

Fig.2 The behavior of 222Rn in groundwater and surface water

图3 地表水体 222Rn质量平衡模型概念图

Fig.3 The conceptual model of 222Rn mass balance

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氡(²²²Rn)在地下水-地表水相互作用中的应用研究进展

Advances in 222Rn application in the study of groundwater-surface water interactions

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