HR: 10:20h
AN: H32A-01    [Abstracts]
TI: Characterization of Pore Structures Relevant for Phase Distribution and Water Flow
AU: Lehmann, P
EM: peter.lehmann@env.ethz.ch
AF: Swiss Federal Institute of Technology Zurich, Grabenstrasse 11a, Schlieren, 8952 Switzerland
AU: * Kaestner, A P
EM: anders.kaestner@env.ethz.ch
AF: Swiss Federal Institute of Technology Zurich, Grabenstrasse 11a, Schlieren, 8952 Switzerland
AU: Krafczyk, M
EM: kraft@cab.bau.tu-bs.de
AF: Technical University Braunschweig, PF 3329, Braunschweig, 38023 Germany
AU: Fluehler, H
EM: hannes.fluehler@env.ethz.ch
AF: Swiss Federal Institute of Technology Zurich, Grabenstrasse 11a, Schlieren, 8952 Switzerland
AB: Water retention and flow velocity depend on the geometric properties of the pore scale. With synchrotron tomography we determined the pore structure of different sand materials with a resolution of 3.5 and 11 microns. The highly resolved images of the sand samples were analyzed with respect to transport relevant geometric properties. Different measures of pore size and connectivity were compared to the measured water retention curve and the water saturated conductivity. The distribution of water and air in the mapped pore structure was calculated with a morphological pore network model. The water saturated hydraulic conductivity was determined with a Lattice-Boltzmann approach. The predictions were in good agreement with the results of the laboratory measurements.
DE: 1866 Soil moisture
DE: 1875 Unsaturated zone
DE: 1894 Instruments and techniques
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting