| 氡(222Rn)在地下水-地表水相互作用中的应用研究进展 |
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| 引用本文： | 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. |
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| 作者姓名： | 廖福 罗新 谢月清 易立新 李海龙 王广才 |
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| 作者单位： | 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 1000832.香港大学 地球科学系, 香港 9990773.南京大学 地球科学与工程学院, 江苏 南京 2100234.南开大学 环境科学与工程学院, 天津 3000715.南方科技大学 环境科学与工程学院, 广东 深圳 518055 |
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| 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。
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| 关 键 词： | 氡(222Rn) 地下水-地表水相互作用 地下水排泄 |
| 收稿时间： | 2022-01-17 |
Advances in 222Rn application in the study of groundwater-surface water interac-tions |
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| LIAO Fu,LUO Xin,XIE Yueqing,YI Lixin,LI Hailong,WANG Guangcai.Advances in 222Rn application in the study of groundwater-surface water interac-tions[J].Earth Science Frontiers,2022,29(3):76-87. |
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| Authors: | LIAO Fu LUO Xin XIE Yueqing YI Lixin LI Hailong WANG Guangcai |
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| 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. |
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| Keywords: | radon (222Rn) groundwater-surface water interaction groundwater discharge |
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