Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028908 |
On the Reliability of Parameter Inferences in a Multiscale Model for Transport in Stream Corridors | |
Saubhagya Singh Rathore; Ahmad Jan; Ethan T. Coon; Scott L. Painter | |
2021-04-07 | |
发表期刊 | Water Resources Research
![]() |
出版年 | 2021 |
英文摘要 | Non‐reacting tracer tests capture information about physical processes in transient storage zones including the hyporheic zone (HZ). However, reliably extracting this information from breakthrough curves and distinguishing the effects of in‐channel dispersion and transient storage are well‐known challenges. Using breakthrough curves from a non‐reacting tracer test monitored at multiple locations, we explore ways for reliable parameter estimations. The identifiability of parameters is greatly influenced by the choice of forward and inverse modeling frameworks in addition to the quality of the data. Our forward model is a recently proposed multiscale model that uses subgrid transport models written in Lagrangian form to represent transport along a diverse set of HZ pathways with a shape‐free distribution of travel times. Joint distributions of HZ and channel parameters are estimated using the Markov Chain Monte Carlo technique. Numerical experiments show ambiguity between channel dispersion and HZ transport when the reach length is too short to allow significant solute‐HZ interaction, the observation period is too brief to observe the tailing behavior, or the solute source is spread in time. In contrast, we obtained reliable parameter estimates by simultaneously fitting breakthrough curves observed at different locations in the test reach using a single set of HZ parameters and section‐specific channel areas and dispersion coefficients. This study demonstrates the estimation of travel‐time distributions, HZ exchange rates, and channel parameters in a new multiscale approach and offers guidance for extracting reliable parameter estimates from multiple breakthrough curves. 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/321993 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Saubhagya Singh Rathore,Ahmad Jan,Ethan T. Coon,et al. On the Reliability of Parameter Inferences in a Multiscale Model for Transport in Stream Corridors[J]. Water Resources Research,2021. |
APA | Saubhagya Singh Rathore,Ahmad Jan,Ethan T. Coon,&Scott L. Painter.(2021).On the Reliability of Parameter Inferences in a Multiscale Model for Transport in Stream Corridors.Water Resources Research. |
MLA | Saubhagya Singh Rathore,et al."On the Reliability of Parameter Inferences in a Multiscale Model for Transport in Stream Corridors".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