globalchange  > 气候变化与战略
DOI: 10.5194/hess-24-2561-2020
论文题名:
Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics
作者: Knapp J.L.A.; Von Freyberg J.; Studer B.; Kiewiet L.; Kirchner J.W.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2020
卷: 24, 期:5
起始页码: 2561
结束页码: 2576
语种: 英语
Scopus关键词: Groundwater ; Runoff ; Trace elements ; Electrical conductivity ; Hydrologic events ; Hydrological events ; Low-frequency data ; Major ions ; Solute concentrations ; Streamwater chemistry ; Trace metal ; Catchments ; catchment ; concentration (composition) ; discharge ; hydrological change ; hydrological response ; solute transport ; time series analysis ; Switzerland
英文摘要: Studying the response of streamwater chemistry to changes in discharge can provide valuable insights into how catchments store and release water and solutes. Previous studies have determined concentration-discharge (cQ) relationships from long-term, low-frequency data of a wide range of solutes. These analyses, however, provide little insight into the coupling of solute concentrations and flow during individual hydrologic events. Event-scale cQ relationships have rarely been investigated across a wide range of solutes and over extended periods of time, and thus little is known about differences and similarities between event-scale and long-term cQ relationships. Differences between event-scale and long-term cQ behavior may provide useful information about the processes regulating their transport through the landscape. Here we analyze cQ relationships of 14 different solutes, ranging from major ions to trace metals, as well as electrical conductivity, in the Swiss Erlenbach catchment. From a 2-year time series of sub-hourly solute concentration data, we determined 2-year cQ relationships for each solute and compared them to cQ relationships of 30 individual events. The 2-year cQ behavior of groundwater-sourced solutes was representative of their cQ behavior during hydrologic events. Other solutes, however, exhibited very different cQ patterns at the event scale and across 2 consecutive years. This was particularly true for trace metals and atmospheric and/or biologically active solutes, many of which exhibited highly variable cQ behavior from one event to the next. Most of this inter-event variability in cQ behavior could be explained by factors such as catchment wetness, season, event size, input concentrations, and event-water contributions. We present an overview of the processes regulating different groups of solutes, depending on their origin in and pathways through the catchment. Our analysis thus provides insight into controls on solute variations at the hydrologic event scale. © 2020 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162692
Appears in Collections:气候变化与战略

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作者单位: Knapp, J.L.A., Department of Environmental Systems Science, ETH Zurich, Zurich, 8092, Switzerland; Von Freyberg, J., Department of Environmental Systems Science, ETH Zurich, Zurich, 8092, Switzerland, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, 8903, Switzerland; Studer, B., Department of Environmental Systems Science, ETH Zurich, Zurich, 8092, Switzerland; Kiewiet, L., Department of Geography, University of Zurich, Zurich, 8057, Switzerland; Kirchner, J.W., Department of Environmental Systems Science, ETH Zurich, Zurich, 8092, Switzerland, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, 8903, Switzerland, Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States

Recommended Citation:
Knapp J.L.A.,Von Freyberg J.,Studer B.,et al. Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics[J]. Hydrology and Earth System Sciences,2020-01-01,24(5)
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