Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR029824 |
Identifying Stagnation Zones and Reverse Flow Caused by River-Aquifer Interaction: An Approach Based on Polynomial Chaos Expansions | |
P. Merchá; n-Rivera; B. Wohlmuth; G. Chiogna | |
2021-11-24 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Fluctuating stream stages and peak-flow events can significantly influence the interactions between streams and aquifers and modify the hydraulic gradient, the flux exchange and the subsurface flow paths. As a result, stagnation zones and reverse flow may appear in different parts of an aquifer and at different times. These features of the flow field play a relevant role in the transport, transformation, and residence time of solutes, pollutants, and nutrients in the subsurface. However, their identification using numerical models is complex not only because of highly non-linear dynamics, but also due to significant uncertainties in the model input data which propagate into the quantities of interest. In this work, we use an approach based on polynomial chaos expansions to map the probability of occurrence of stagnation zones and reverse flow during a flood event. We quantify the propagation of uncertainty into the groundwater flow field due to the applied river boundary conditions. Then, we evaluate the responses of the posterior probabilities in an element-wise fashion using a set of flow classification criteria and kernel density estimations. The proposed methodology is flexible because it employs a non-intrusive pseudo-spectral technique and, consequently, it can be applied straightforwardly in pre-existing models. The regions near the confluence of two streams in the studied area are prone to present transient stagnation and reverse flow. 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/342369 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | P. Merchá,n-Rivera,B. Wohlmuth,et al. Identifying Stagnation Zones and Reverse Flow Caused by River-Aquifer Interaction: An Approach Based on Polynomial Chaos Expansions[J]. Water Resources Research,2021. |
APA | P. Merchá,n-Rivera,B. Wohlmuth,&G. Chiogna.(2021).Identifying Stagnation Zones and Reverse Flow Caused by River-Aquifer Interaction: An Approach Based on Polynomial Chaos Expansions.Water Resources Research. |
MLA | P. Merchá,et al."Identifying Stagnation Zones and Reverse Flow Caused by River-Aquifer Interaction: An Approach Based on Polynomial Chaos Expansions".Water Resources Research (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论