Description: Das Projekt "Quantification of active interfaces with respect to dissolved chemicals in unsaturated structured soil" wird vom Umweltbundesamt gefördert und von Helmholtz-Zentrum für Umweltforschung GmbH - UFZ, Department Bodenphysik durchgeführt. During the first project period we developed a general approach to quantify soil pore structure based on X-ray micro-tomography Vogel et al. (2010) which is applicable at various scales to cover soil pores larger that 0.05 mm in a representative way. Based on this method we generated equivalent network models to numerically simulate flow and transport of dissolved chemicals. The existing network model was extended to handle reactive transport and infiltration processes which are especially critical for matter flux in soil. The results were compared to experimental findings. The original research question 'what does a particle see on its way through soil' could be answered quantitatively for various boundary conditions including steady state flux and infiltration. However, we identified various critical aspects of the proposed modeling concept which will be in the focus of the second period. This includes 1) the spatial arrangement of interfaces having different quality which is crucial for chemical interactions and pore scale water dynamics, 2) the realistic multiphase dynamics at the pore scale which need to reflect the dynamic pressure and movement of trapped non-wetting phase and 3) the parametrization of structural complexity which need to be developed beyond the measurement of continuous Minkowski functions to allow the development of quantitative relations between structure and function. These aspects will be explored in a joint experiments in cooperation with partners within the SPP.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Rochen ? Röntgenstrahlung ? Vogel ? Bodenkunde ? Bodenstruktur ? Gebäude ? Infiltration ? Messung ? Bewässerung ? Bodenphysik ? Chemikalien ? Umweltforschung ? Wasserqualität ? Wasser ? Boden ? Modellierung ? Bedarf ? Forschung ? Partikel ? Zusammenarbeit ? Verkehr ? Staat ? VERFRACHTUNG ? BESTEHEND ? ASPEKT ? VERGLEICHEN ? VERHAELTNIS ? Wechselwirkung ? ZEITRAEUME ? BEZUG ? BIOGEOCHEMISCH ? Bodenbedeckung [Abdeckung] ? DAUER ? DRUCK ? EINFANGEN ? ENTWICKLUNG ? ERGEBNIS ? EXPERIMENT ? FRAGE ? FUNKTION ? Fluss [Bewegung] ? GELOEST ? GLEICHMAESSIG ? GRENZE ? LAENDER ? METHODE ? PROJEKT ? SCHNITTSTELLE ? See [Binnengewässer] ? UNSATURIERT ? VERARBEITEN ?
Region: Saxony-Anhalt
Bounding box: 11.7333° .. 11.7333° x 52° .. 52°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2007-01-01 - 2024-11-29
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