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Time Series of Elec...
Time Series of Electrical Conductivity Fluctuations Give Insights Into Long-Term Solute Transport Dynamics of an Urban Stream
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- Jaeger, Anna (author)
- Department Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University Berlin, Berlin, Germany
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- Schaper, Jonas L. (author)
- Department Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Center for Applied Geoscience, Eberhard Karls University of Tübingen, Tübingen, Germany
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- Romeijn, Paul (author)
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK
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- Betterle, Andrea (author)
- European Commission, Joint Research Centre, Ispra, Italy; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland
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- Posselt, Malte, 1987- (author)
- Stockholms universitet,Institutionen för miljövetenskap,Department of Environmental Science, Stockholm University, Stockholm, Sweden
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- Krause, Stefan (author)
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK; CNRS, ENTPE, UMR5023, Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), University Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
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- Lewandowski, Jörg (author)
- Department Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University Berlin, Berlin, Germany
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- Riml, Joakim, 1979- (author)
- KTH,Resurser, energi och infrastruktur
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(creator_code:org_t)
- American Geophysical Union (AGU), 2023
- 2023
- English.
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In: Water resources research. - : American Geophysical Union (AGU). - 0043-1397 .- 1944-7973. ; 59:7
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https://doi.org/10.1...
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Abstract
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- Artificial tracers are often used for quantitative estimates of solute transport properties in rivers. However, single-injection tracer tests give insights in transport characteristics limited to the ecohydrological conditions at the testing time. Series of time-consuming and laborious tracer tests would be required to properly capture seasonal changes. The present study uses intrinsic diurnal fluctuations of electrical conductivity (EC) caused by discharge of treated wastewater as a tracer to evaluate solute transport processes along a 4.7-km reach of the River Erpe, Germany. By reproducing the fluctuations recorded along the river using the solute transport model one-dimensional transport with inflow and storage, this study investigated the long-term dynamics in solute transport properties. Individual 48-hr curves of EC were used in the steady state configuration of the model to gain 48-hr-integrated estimates of selected transport parameters. Using a sliding window approach in 1-hr steps along the 2,270-hr time series of EC the temporal variability of solute transport between April and June 2016 was assessed. To test the identifiability of parameters using the proposed method, sensitivity analyses and a breakthrough curve analysis of selected 48-hr windows were implemented. With time advancing into the summer, a significant rising trend (Mann-Kendall test p-value < 0.05) of the cross sectional area of the channel was observed and attributed to the growth of macrophytes and a significant slightly decreasing trend for the storage rate was found. The presented method is of high value for river management, as promoting transient storage enhances biogeochemical cycling and benefits water quality.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Samhällsbyggnadsteknik -- Vattenteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Civil Engineering -- Water Engineering (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Havs- och vattendragsteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Ocean and River Engineering (hsv//eng)
Keyword
- electrical conductivity
- river solute transport
- transient storage
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Jaeger, Anna
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Schaper, Jonas L ...
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Romeijn, Paul
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Betterle, Andrea
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Posselt, Malte, ...
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Krause, Stefan
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Lewandowski, Jör ...
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Riml, Joakim, 19 ...
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- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Civil Engineerin ...
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and Water Engineerin ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Oceanography Hyd ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Ocean and River ...
- Articles in the publication
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Water resources ...
- By the university
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Royal Institute of Technology
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Stockholm University