气候变化领域集成服务门户(CCPortal): Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics

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DOI	10.5194/hess-24-2561-2020
	Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics
	Knapp J.L.A.; Von Freyberg J.; Studer B.; Kiewiet L.; Kirchner J.W.
发表日期	2020
ISSN	1027-5606
起始页码	2561
结束页码	2576
卷号	24 期号:5
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).
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
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159402
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
推荐引用方式 GB/T 7714	Knapp J.L.A.,Von Freyberg J.,Studer B.,et al. Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics[J],2020,24(5).
APA	Knapp J.L.A.,Von Freyberg J.,Studer B.,Kiewiet L.,&Kirchner J.W..(2020).Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics.Hydrology and Earth System Sciences,24(5).
MLA	Knapp J.L.A.,et al."Concentration-discharge relationships vary among hydrological events; reflecting differences in event characteristics".Hydrology and Earth System Sciences 24.5(2020).