Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR029931 |
Streams as mirrors: reading subsurface water chemistry from stream chemistry | |
Bryn Stewart; James B. Shanley; James W. Kirchner; David Norris; Thomas Adler; Caitlin Bristol; Adrian A. Harpold; Julia N. Perdrial; Donna M. Rizzo; Gary Sterle; Kristen L. Underwood; Hang Wen; Li Li | |
2021-10-22 | |
发表期刊 | Water Resources Research
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出版年 | 2021 |
英文摘要 | The shallow and deep hypothesis suggests that stream concentration-discharge (CQ) relationships are shaped by distinct source waters from different depths. Under this hypothesis, baseflows are typically dominated by groundwater and mostly reflect groundwater chemistry, whereas high flows are typically dominated by shallow soil water and mostly reflect soil water chemistry. Aspects of this hypothesis draw on applications like end member mixing analyses and hydrograph separation, yet direct data support for the hypothesis remains scarce. This work tests the shallow and deep hypothesis using co-located measurements of soil water, groundwater, and streamwater chemistry at two intensively monitored sites, the W-9 catchment at Sleepers River (Vermont, United States) and the Hafren catchment at Plynlimon (Wales). At both sites, depth profiles of subsurface water chemistry and stream CQ relationships for the 10 solutes analyzed are broadly consistent with the hypothesis. Solutes that are more abundant at depth (e.g., calcium) exhibit dilution patterns (concentration decreases with increasing discharge). Conversely, solutes enriched in shallow soils (e.g., nitrate) generally exhibit flushing patterns (concentration increases with increasing discharge). The hypothesis may hold broadly true for catchments that share such biogeochemical stratifications in the subsurface. Soil water and groundwater chemistries were estimated from high- and low-flow stream chemistries with average relative errors ranging from 24 to 82%. This indicates that streams mirror subsurface waters: stream chemistry can be used to infer scarcely measured subsurface water chemistry, especially where there are distinct shallow and deep end members. 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/340854 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Bryn Stewart,James B. Shanley,James W. Kirchner,et al. Streams as mirrors: reading subsurface water chemistry from stream chemistry[J]. Water Resources Research,2021. |
APA | Bryn Stewart.,James B. Shanley.,James W. Kirchner.,David Norris.,Thomas Adler.,...&Li Li.(2021).Streams as mirrors: reading subsurface water chemistry from stream chemistry.Water Resources Research. |
MLA | Bryn Stewart,et al."Streams as mirrors: reading subsurface water chemistry from stream chemistry".Water Resources Research (2021). |
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