Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028960 |
Tracing Bank Storage and Hyporheic Exchange Dynamics using 222Rn: Virtual and Field Tests and Comparison with Other Tracers | |
Fu Liao; M. Bayani Cardenas; Stephen B. Ferencz; Xiaobing Chen; Guangcai Wang | |
2021-04-25 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Dynamic hydrologic exchange flows in river beds and banks are important for many ecosystem functions throughout river corridors. Here we test whether the exchanges and the associated mixing between a flooding river and groundwater within the river's bank can be effectively traced by 222Rn, a naturally occurring, inert, radiogenic and radioactive gas that can be analyzed and monitored in situ. The assessment was done by simulation of groundwater flow and reactive transport of 222Rn in the bank following a single, relatively rapid (hours long) flood wave and auxiliary field observations of 222Rn, temperature and total dissolved solids (TDS, a surrogate for any ionic conservative tracer). Results illustrate that 222Rn is more effective than temperature and TDS in tracing dynamic hyporheic exchange. 222Rn variations in space and time are larger than the analytical uncertainty of common measurement methods. The individual effects of aquifer hydraulic conductivity, dispersivity, river water 222Rn concentration, and bank topography were analyzed through sensitivity analysis. Larger hydraulic conductivity and dispersivity, lower 222Rn concentration in river water relative to groundwater, and gentler bank slopes resulted in a more prominent and traceable 222Rn signal. The transport and residence time of exchanged water may be estimated and interpreted using reactive transport models such as those implemented here. However, such application is sensitive to fluctuations in river water 222Rn, requiring it to be well characterized. The assessment provides guidance for using 222Rn as a tracer for groundwater‐surface water interactions in dynamic settings. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/324008 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Fu Liao,M. Bayani Cardenas,Stephen B. Ferencz,et al. Tracing Bank Storage and Hyporheic Exchange Dynamics using 222Rn: Virtual and Field Tests and Comparison with Other Tracers[J]. Water Resources Research,2021. |
APA | Fu Liao,M. Bayani Cardenas,Stephen B. Ferencz,Xiaobing Chen,&Guangcai Wang.(2021).Tracing Bank Storage and Hyporheic Exchange Dynamics using 222Rn: Virtual and Field Tests and Comparison with Other Tracers.Water Resources Research. |
MLA | Fu Liao,et al."Tracing Bank Storage and Hyporheic Exchange Dynamics using 222Rn: Virtual and Field Tests and Comparison with Other Tracers".Water Resources Research (2021). |
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