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  • Jaeger, AnnaDepartment Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University Berlin, Berlin, Germany (author)

Time Series of Electrical Conductivity Fluctuations Give Insights Into Long-Term Solute Transport Dynamics of an Urban Stream

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • American Geophysical Union (AGU),2023
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-334361
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-334361URI
  • https://doi.org/10.1029/2022WR034203DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-221277URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20230821
  • 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.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Schaper, Jonas L.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 (author)
  • Romeijn, PaulSchool of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK (author)
  • Betterle, AndreaEuropean Commission, Joint Research Centre, Ispra, Italy; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Dübendorf, Switzerland (author)
  • Posselt, Malte,1987-Stockholms universitet,Institutionen för miljövetenskap,Department of Environmental Science, Stockholm University, Stockholm, Sweden(Swepub:su)mapo9821 (author)
  • Krause, StefanSchool 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 (author)
  • Lewandowski, JörgDepartment Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University Berlin, Berlin, Germany (author)
  • Riml, Joakim,1979-KTH,Resurser, energi och infrastruktur(Swepub:kth)u1265deb (author)
  • Department Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Geography Department, Humboldt University Berlin, Berlin, GermanyDepartment Ecohydrology and Biogeochemistry, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Berlin, Germany; Center for Applied Geoscience, Eberhard Karls University of Tübingen, Tübingen, Germany (creator_code:org_t)

Related titles

  • In:Water resources research: American Geophysical Union (AGU)59:70043-13971944-7973

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