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Simulation of a reactive tracer experiment using stochastic hydraulic conductivity fields |
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| Authors: | Stefan Gödeke Helmut Geistlinger Anko Fischer Hans-Hermann Richnow Mario Schirmer |
| Institution: | 1. Department of Groundwater Remediation, UFZ Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318, Leipzig, Germany 5. URS Australia Pty Ltd, 20 Terrace Rd, East Perth, Australia 2. Department of Soil Physics, UFZ Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120, Halle/Saale, Germany 3. Department of Isotope Biogeochemistry, UFZ Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318, Leipzig, Germany 4. Department of Hydrogeology, UFZ Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318, Leipzig, Germany |
| Abstract: | Reactive tracer tests are performed to derive flow, transport and in situ biodegradation parameters. This paper describes the 3D simulation of a reactive tracer test using the transition probability geostatistical approach. Fifty different equally probable aquifer realizations were generated based on the geological information of 107 boreholes in an area of 62,500 m2. One realization was chosen for the reactive transport simulation based on the results of groundwater flow modeling and on particle tracking calculations for the site. Field velocities at the site vary between 0.4 and 3 m/d. The transport of the reactive tracers deuterium ring labeled toluene-d5 and fully deuterated toluene-d8 was simulated and first-order biodegradation rates of 0.017 d−1 for toluene-d5 and 0.012 d−1 for toluene-d8 were determined. |
| Keywords: | Reactive transport First-order biodegradation Toluene-d5 Toluene-d8 Transition probability Geostatistics |
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