Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030529 |
Evaluating Streamwater DOC Dynamics in Context of Variable Flowpath Contributions with a Tracer-Based Mixing Model | |
James E. Saiers; Jennifer H. Fair; James B. Shanley; Jacob Hosen; Serena Matt; Kevin A. Ryan; Peter A. Raymond | |
2021-09-23 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | This study focuses on characterizing the contributions of key terrestrial pathways that deliver DOC to streams during hydrologic events and on elucidating factors governing variation in water and DOC fluxes from these pathways. We made high-frequency measurements of discharge, specific conductance (SC), and fluorescent dissolved organic matter (FDOM) during 221 events recorded over two years within four Vermont (USA) watersheds that range in area from 0.4 km2 to 139 km2. Using the SC measurements, together with statistical information on discharge, we separated the event hydrographs into contributions from three terrestrial pathways, which we refer to as riparian quickflow, subsurface quickflow, and slow-flow groundwater. The pathway discharges were used as input to a mixing model that closely approximated sub-hourly streamwater DOC concentrations as measured with the FDOM sensors. Subsurface quickflow, comprised of pre-event water, was the leading contributor to streamwater DOC fluxes, while riparian quickflow, comprised of event water, was the second-leading contributor to streamwater DOC fluxes, despite comprising the smallest proportion of streamflow yield among the three end-member pathways. Fixed-effects regression analysis revealed that the relationship between DOC fluxes from the end-member pathways and event magnitude was consistent across the four watersheds. This analysis also showed that DOC fluxes from the quickflow pathways increased significantly with temperature and varied inversely, but weakly, with catchment antecedent wetness. We believe that our approach, which leverages in-stream sensors that enable high-frequency measurements over extended periods, may be applicable for evaluating controls on DOC export from other watersheds within and beyond our study region. 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/338757 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | James E. Saiers,Jennifer H. Fair,James B. Shanley,et al. Evaluating Streamwater DOC Dynamics in Context of Variable Flowpath Contributions with a Tracer-Based Mixing Model[J]. Water Resources Research,2021. |
APA | James E. Saiers.,Jennifer H. Fair.,James B. Shanley.,Jacob Hosen.,Serena Matt.,...&Peter A. Raymond.(2021).Evaluating Streamwater DOC Dynamics in Context of Variable Flowpath Contributions with a Tracer-Based Mixing Model.Water Resources Research. |
MLA | James E. Saiers,et al."Evaluating Streamwater DOC Dynamics in Context of Variable Flowpath Contributions with a Tracer-Based Mixing Model".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