Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030298 |
Model choice impacts the quantification of seasonal hyporheic exchange depths and fluxes | |
Lara-Maria Schmitgen; Reinhard Bierl; Tobias Schuetz | |
2021-11-22 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Direction and depths of hyporheic exchange fluxes at the groundwater - surface water interface are drivers of biogeochemical processes influencing nutrient cycling and water quality. Model concepts on the dynamic relationship between hyporheic exchange fluxes and exchange depth are typically based on the assumption of a linear relationship between both measures. Here, we quantify seasonal and episodic variations of hyporheic exchange fluxes and hyporheic exchange depths with methods of heat tracing. Numerically (FLUX-BOT) and analytically (VFLUX; method based on temperature amplitude dampening developed by Hatch et al., 2006) working program scripts were used to solve the one-dimensional conduction-advection-dispersion equation and compute hyporheic flux rates from three vertical sediment water temperature profiles recorded continuously in a small low mountain creek between 2011 and 2017. By comparing the behavior of two differing water temperature-based modelling approaches, dissimilarities in the sensitivity to sediment thermal properties were identified. Besides the differences in parameter responsivity differences in how the temperature data is incorporated, explain deviating behavior of the models regarding exchange flux and depth calculations. We show that the vertical extension of hyporheic exchange depth has a distinctive seasonal pattern over seven years, which differs according to the positioning in the riffle-pool-sequence. Surface water levels, groundwater levels and stream discharges show significant correlations with both flux direction and hyporheic zone extension. Temperature derived flux data allowed for establishing a significant relationship between hyporheic exchange fluxes and hyporheic exchange depths. 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/342392 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Lara-Maria Schmitgen,Reinhard Bierl,Tobias Schuetz. Model choice impacts the quantification of seasonal hyporheic exchange depths and fluxes[J]. Water Resources Research,2021. |
APA | Lara-Maria Schmitgen,Reinhard Bierl,&Tobias Schuetz.(2021).Model choice impacts the quantification of seasonal hyporheic exchange depths and fluxes.Water Resources Research. |
MLA | Lara-Maria Schmitgen,et al."Model choice impacts the quantification of seasonal hyporheic exchange depths and fluxes".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