Schäfer, D., Dahmke, A., Kolditz, O., Teutsch, G. (2002): "Virtual Aquifers": A concept for evaluation <strong>of</strong> exploration, remediation <strong>and</strong> monitoring strategies. In: Kovar, K., Hrkal, Z. (eds.), Calibration <strong>and</strong> Reliability in Groundwater Modelling: A Few Steps Closer to Reality. Proceedings <strong>of</strong> the ModelCARE 2002 Conference, Prague, Czech Republic, June 2002. IAHS Publication 277, 52-59. Schäfer, D., Hornbruch, G. Schlenz, B., Dahmke A. (2006b): Schadst<strong>of</strong>fausbreitung unter Annahme verschiedener kinetischer Ansätze zur Modellierung mikrobiellen Abbaus. Grundwasser (in print). Scheidleder, A., Grath, J., Winkler, G., Stärk., U, Koreimann., C, Gmeiner, C., Nixon, S., Casillas, J., Gravesen, P., Leonard, J., Elvira, M. (1999): Groundwater quality <strong>and</strong> quantity in Europe. European Environment Agency, Copenhagen, 123 p. Simkins, S., Alex<strong>and</strong>er, M. (1984): Models for mineralization kinetics with variables <strong>of</strong> substrate concentration <strong>and</strong> population density. Appl. Envir. Microbiol., 47, 1299-1306. Starke, G. (2000): Least-squares mixed finite element solution <strong>of</strong> variably <strong>saturated</strong> subsurface <strong>flow</strong> problems. SIAM J. Sci. Comput. 21, 1869-1885, 10.1137/S1064827598339384 Stenback, G.A., Ong, S.K., Rogers, S.W., Kjartanson, B.H. (2004): Impact <strong>of</strong> transverse <strong>and</strong> longitudinal dispersion on first-order degradation rate constant estimation. J. Contam. Hydrol., 73, 3-14, 10.1016/j.jconhyd.2003.11.004. Streck, T., Poletika, N.N., Jury, W.A. Farmer, W.J. (1995): Description <strong>of</strong> simazine transport with rate-limited, two-stage linear <strong>and</strong> nonlinear sorption. Water Resour. Res., 31, 811-822, 10.1029/94WR02822 Thorenz, C. (1999): Model Adaptive Simulation <strong>of</strong> Multiphase <strong>and</strong> Density Driven Flow in Fractured <strong>and</strong> Porous Media. Dissertation, Institut für Strömungsmechanik, Universität Hannover, Bericht Nr. 62/2001. Van Genuchten, M.T. (1980): A closed form equation for predicting the hydraulic conductivity <strong>of</strong> un<strong>saturated</strong> soils. Soil Sci. Soc. Am. J., 44, 892-898. Van Genuchten, M.T., Alves, W.J. (1982): Analytical solutions <strong>of</strong> the one-dimensional convective dispersive solute transport equation. USDA ARS Technical Bulletin Number 1661. U.S. Salinity Laboratory, 4500 Glenwood Drive, Riverside, CA 92501. Wang, W., Datcheva, M., Schanz, T., Kolditz, O. (2006): A sub-stepping approach for elastoplasticity with rotational hardening. Computational Mechanics. (in print). 10.1007/s00466-005- 0710-5 Wiedemeier, T.H., Swanson, M.A., Wilson, J.T., Kampbell, D.H., Miller, R.N., Hansen, J.E. (1996): Approximation <strong>of</strong> biodegradation rate constants for monoaromatic hydrocarbons (BTEX) in ground water. Ground Water Monit. Remed., 16 (3),186-194. Wiedemeier, T.H., Rifai, H.S., Newell, C.J., Wilson, J.T. (1999): Natural Attenuation <strong>of</strong> Fuels <strong>and</strong> Chlorinated Solvents in the Subsurface. John Wiley <strong>and</strong> Sons, New York, 632 p. Wilson, R.D., Thornton, S.F., Mackay, D.M. (2004): Challenges in monitoring the natural attenuation <strong>of</strong> spatially variable plumes, Biodegradation, 15, 459-469, 10.1023/B:BIOD.0000044591.45542.a9 Xie, M., Bauer, S., Kolditz, O., Nowak, T., Shao, H. (2006): Numerical simulation <strong>of</strong> reactive processes in an experiment with partially <strong>saturated</strong> bentonite, J. Contam. Hydrol., 83, 122-147. 10.1016/j.jconhyd.2005.11.003 Zhang, Y.-K., Heathcote, R.C. (2003): An improved method for estimation <strong>of</strong> biodegradation rate with field data. Ground Water Monit. Remed., 23 (3), 112-116. Zheng, C., Bennett, G.D., (1995): <strong>Applied</strong> Contaminant Transport Modeling: Theory <strong>and</strong> Practice. Van Nostr<strong>and</strong> Reinhold, New York, 440 p. Zienkiewicz, O.C., Taylor, R. (1991): The Finite Element Method, Vol. 1, 2 (4th edition). McGraw- Hill, London, 459 p. 26
Enclosed publications [EP 1] Bauer, S., Beyer, C., Kolditz, O., (2005): Assessing measurements <strong>of</strong> first order degradation rates by using the Virtual Aquifer approach. In: Thomson, N.R. (Ed.), GQ2004, Bringing Groundwater Quality Research to the Watershed Scale. Proceedings <strong>of</strong> a Symposium held at Waterloo, Canada, July 2004. IAHS Publication 297, IAHS Press, Wallingford, 274-281. [EP 2] Bauer, S., Beyer, C., Kolditz, O. (2006a): Assessing measurement uncertainty <strong>of</strong> first-order degradation rates in heterogeneous aquifers. Water Resour. Res., 42, W01420, 10.1029/2004WR003878. [EP 3] Beyer, C., Bauer, S., Kolditz, O. (2006): Uncertainty assessment <strong>of</strong> contaminant plume length estimates in heterogeneous aquifers. J. Contam. Hydrol., 87, 73-95, [EP 4] 10.1016/j.jconhyd.2006.04.006. Bauer, S., Beyer, C., Kolditz, O. (2007): Einfluss von Heterogenität und Messfehler auf die Bestimmung von Abbauraten erster Ordnung - eine Virtueller Aquifer Szenarioanalyse. (Influence <strong>of</strong> heterogeneity <strong>and</strong> measurement error on the determination <strong>of</strong> first order degradation rates by us1ing the virtual aquifer approach.), Grundwasser, 12, 3–14, 10.1007/s00767-007-0019-8. [EP 5] Beyer, C., Chen, C., Gronewold, J., Kolditz, O., Bauer, S. (2007a): Determination <strong>of</strong> first order degradation rate constants from monitoring networks. (accepted by Ground Water.). [EP 6] Beyer, C., Konrad, W., Park, C.H., Bauer, S., Rügner, H., Liedl, R., Grathwohl, P. (2007b): Modellbasierte Sickerwasserprognose für die Verwertung von Recycling-Baust<strong>of</strong>f in technischen Bauwerken. (Model based prognosis <strong>of</strong> contaminant leaching for reuse <strong>of</strong> demolition waste in construction projects.) (accepted by Grundwasser <strong>and</strong> published online via SpringerLink), 10.1007/s00767-007-0025-x.
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Einführung In dieser Arbeit wird e
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Entlang der so bestimmten Grundwass
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Für die letztgenannten Methoden m
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Um diesen Effekt zu verdeutlichen s
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Unsicherheit zu. Für Methode 3 ( A
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sagt sowie die zusätzliche Problem
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(1995) yields a “hybrid” rate c
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2 integral scale lY of 2.67 m and l
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The approximate solution employed h
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As Bauer et al. (2006a) demonstrate
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Table 4: Normalized degradation rat
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Comparing results for source widths
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Einleitung und Zielsetzung In Deuts
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die Anzahl Simulationsläufe den Vo
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Grundlage des Korngrößenspektrums
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Dies ist als konservative Abschätz
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Randbedingungen abhängig ist. Aus
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Carsell, R. F., Parish, R. S.: Deve
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van Genuchten, M.T.: A closed form