%0 Journal Article %T GLOBAL RANDOM WALK SIMULATIONS FOR SENSITIVITY AND UNCERTAINTY ANALYSIS OF PASSIVE TRANSPORT MODELS %A Nicolae Suciu %A Calin Vamos %A Harry Vereecken %A Peter Knabner %J Mathematics and its Applications : Annals of the Academy of Romanian Scientists %D 2011 %I Academy of Romanian Scientists Publishing House %X The Global Random Walk algorithm (GRW) performs a simultaneoustracking on a fixed grid of huge numbers of particles at costscomparable to those of a single-trajectory simulation by the traditional Particle Tracking (PT) approach. Statistical ensembles of GRW simulations of a typical advection-dispersion process in groundwater systems with randomly distributed spatial parameters are used to obtain reliable estimations of the input parameters for the upscaled transport model and of their correlations, input-output correlations, as well as full probability distributions of the input and output parameters. %K Probabilistic particle methods %K Transport processes %K Monte Carlo methods %K Groundwater contamination %U http://www.mathematics-and-its-applications.com/preview/july2011/data/13_suciu_n.pdf