Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR024257 |
Distinct Source Water Chemistry Shapes Contrasting Concentration-Discharge Patterns | |
Zhi, Wei1; Li, Li2; Dong, Wenming3; Brown, Wendy4; Kaye, Jason5; Steefel, Carl3; Williams, Kenneth H.3,4 | |
2019-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2019 |
卷号 | 55期号:5页码:4233-4251 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Understanding concentration-discharge (C-Q) relationships are essential for predicting chemical weathering and biogeochemical cycling under changing climate and anthropogenic conditions. Contrasting C-Q relationships have been observed widely, yet a mechanistic framework that can interpret diverse patterns remains elusive. This work hypothesizes that seemingly disparate C-Q patterns are driven by switching dominance of end-member source waters and their chemical contrasts arising from subsurface biogeochemical heterogeneity. We use data from Coal Creek, a high-elevation mountainous catchment in Colorado, and a recently developed watershed reactive transport model (BioRT-Flux-PIHM). Sensitivity analysis and Monte-Carlo simulations (500 cases) show that reaction kinetics and thermodynamics and distribution of source materials across depths govern the chemistry gradients of shallow soil water and deeper groundwater entering the stream. The alternating dominance of organic-poor yet geo-solute-rich groundwater under dry conditions and organic-rich yet geo-solute-poor soil water during spring melt leads to the flushing pattern of dissolved organic carbon and the dilution pattern of geogenic solutes (e.g., Na, Ca, and Mg). In addition, the extent of concentration contrasts regulates the power law slopes (b) of C-Q patterns via a general equation bmin. At low ratios of soil water versus groundwater concentrations (C-ratio=C-sw/C-gw<0.6), dilution occurs; at high ratios (C-ratio>1.8), flushing arises; chemostasis occurs in between. This equation quantitatively interprets b values of 11 solutes (dissolved organic carbon, dissolved P, NO3-, K, Si, Ca, Mg, Na, Al, Mn, and Fe) from three catchments (Coal Creek, Shale Hills, and Plynlimon) of differing climate, geologic, and land cover conditions. This indicates potentially broad regulation of subsurface biogeochemical heterogeneity in determining C-Q patterns and wide applications of this equation in quantifying b values, which can have broad implications for predicting chemical weathering and biogeochemical transformation at the watershed scale. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000474848500035 |
WOS关键词 | DISSOLVED ORGANIC-CARBON ; CRITICAL ZONE ; RIVER-BASIN ; WEATHERING RATES ; DOC EXPORT ; SOIL ; GROUNDWATER ; CATCHMENTS ; SNOWMELT ; NUTRIENT |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/183143 |
专题 | 资源环境科学 |
作者单位 | 1.Penn State Univ, Dept Energy & Mineral Engn, University Pk, PA 16802 USA; 2.Penn State Univ, Dept Civil & Environm Engn, University Pk, PA 16802 USA; 3.Lawrence Berkeley Natl Lab, Earth & Environm Sci Area, Berkeley, CA USA; 4.Rocky Mt Biol Labs, Crested Butte, CO USA; 5.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA |
推荐引用方式 GB/T 7714 | Zhi, Wei,Li, Li,Dong, Wenming,et al. Distinct Source Water Chemistry Shapes Contrasting Concentration-Discharge Patterns[J]. WATER RESOURCES RESEARCH,2019,55(5):4233-4251. |
APA | Zhi, Wei.,Li, Li.,Dong, Wenming.,Brown, Wendy.,Kaye, Jason.,...&Williams, Kenneth H..(2019).Distinct Source Water Chemistry Shapes Contrasting Concentration-Discharge Patterns.WATER RESOURCES RESEARCH,55(5),4233-4251. |
MLA | Zhi, Wei,et al."Distinct Source Water Chemistry Shapes Contrasting Concentration-Discharge Patterns".WATER RESOURCES RESEARCH 55.5(2019):4233-4251. |
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