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Integrated modeling of flow and residence times at the catchment scale with multiple interacting pathways
Lancaster University.
Lancaster University.
Uppsala universitet.
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Centre for Climate and Safety.
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2013 (English)In: Water resources research, ISSN 0043-1397, E-ISSN 1944-7973, Vol. 49, no 8, 4738-4750 p.Article in journal (Refereed) Published
Abstract [en]

There is still a need for catchment hydrological and transport models that properly integrate the effects of preferential flows while accounting for differences in velocities and celerities. A modeling methodology is presented here which uses particle tracking methods to simulate both flow and transport in multiple pathways in a single consistent solution. Water fluxes and storages are determined by the volume and density of particles and transport is attained by labeling the particles with information that may be tracked throughout the lifetime of that particle in the catchment. The methodology allows representation of preferential flows through the use of particle velocity distributions, and mixing between pathways can be achieved with pathway transition probabilities. A transferable 3-D modeling methodology is presented for the first time and applied to a unique step-shift isotope experiment that was carried out at the 0.63 ha G1 catchment in Gårdsjön, Sweden. This application highlights the importance of combining flow and transport in hydrological representations, and the importance of pathway velocity distributions and interactions in obtaining a satisfactory representation of the observations.

Place, publisher, year, edition, pages
2013. Vol. 49, no 8, 4738-4750 p.
Keyword [en]
residence time, catchment modeling, isotope
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:kau:diva-31016DOI: 10.1002/wrcr.20377ISI: 000324838300017OAI: oai:DiVA.org:kau-31016DiVA: diva2:691257
Available from: 2014-01-27 Created: 2014-01-27 Last updated: 2014-03-03Bibliographically approved

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Nyberg, Lars
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