Abstract
In postclosure safety analyses for final radioactive waste repositories, the retention potential of the host rock and the overburden which forms an important component of the barrier system has to be analysed. This includes groundwater and contaminant transport calculations. In order to assess the model uncertainties coming from spatial variability and incomplete knowledge concerning the site under consideration, a stepwise approach is being developed which finally should include as much as possible of the available site-specific information. The first step of this approach consist of a geostatistical analysis of the spatial distribution of hydrogeological units represented by indicator variables and of hydrogeological parameters within these units. For the models obtained, groundwater and solute transport calculations have been performed. The approach is demonstrated using data from the Gorleben site. In addition, a method for the calculation of sensitivities of several performance measures with respect to the parameter distribution in specific parts of the model is proposed and demonstrated.
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Röhlig, KJ., Pöltl, B. (2001). Uncertainty and Sensitivity Analyses for Contaminant Transport Models Based on Conditional Indicator Simulations. In: Monestiez, P., Allard, D., Froidevaux, R. (eds) geoENV III — Geostatistics for Environmental Applications. Quantitative Geology and Geostatistics, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0810-5_22
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DOI: https://doi.org/10.1007/978-94-010-0810-5_22
Publisher Name: Springer, Dordrecht
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