Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
2009
Authors
Dana Daniela Maria Soare Daniela Stefanescu Valentina Cotet Tore Krogstad Marianne Bechmann Florin Oancea Carmen Lupu Florentin ChitoranAbstract
No abstract has been registered
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Authors
Johannes Deelstra Sigrun Hjalmarsdottir Kværnø Kirsti Granlund Antanas Sigitas Sileika Kazimieras Gaigalis Katarina Kyllmar Nils VagstadAbstract
No abstract has been registered
2008
Authors
Marianne Bechmann Johannes Deelstra Per Stålnacke Hans Olav Eggestad Lillian Øygarden Annelene PengerudAbstract
No abstract has been registered
Abstract
For subsurface solute transport, flux concentrations are key, while usually resident concentrations are measured. Flux concentrations are frequently estimated from resident concentrations by temporal moment analysis. We tested this approach by simulating transport of an injected tracer during steady flow in an aquifer with a heterogeneous saturated hydraulic conductivity. We constructed grid-cell scale breakthrough curves (BTCs) from flux concentrations and approximate BTCs from resident concentrations and estimated flux concentrations. We assembled these BTCs into spatio-temporal leaching surfaces at various aquifer cross-sections for subsequent analysis. Resident concentrations were unsuitable to assess solute movement in the aquifer. Temporal moment analysis worked well when the entire aquifer cross-section was considered, but performed poorer at the grid-cell scale because it approximates the local velocity by the trajectory average. The leaching surfaces served as valuable tools to demonstrate and quantify the limitations of temporal moment analysis.
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Authors
Janneche Utne Skåre Christiane Kruse Fæste Helle Katrine Knutsen Jan Alexander Augustine Arukwe Trine Eggen Gunnar Sundstøl Eriksen Kari Grave Amund Måge Anders RuusAbstract
No abstract has been registered
Abstract
No abstract has been registered