A risk index for characterising flow pattern in soils using dye tracer distributions

Schlather, Martin ; Huwe, Bernd

Document Type: Article
Year of publication: 2005
The title of a journal, publication series: Journal of Contaminant Hydrology
Volume: 79
Issue number: 1/2
Page range: 25-44
Place of publication: Amsterdam
Publishing house: Elsevier
ISSN: 0169-7722
Publication language: English
Institution: School of Business Informatics and Mathematics > Applied Stochastics (Schlather 2012-)
Subject: 310 Statistics
500 Science
Keywords (English): Brilliant Blue, Groundwater contamination, Pareto distribution, Preferential flow, Vulnerability, Unsaturated zone
Abstract: A novel risk index for the vulnerability of groundwater by pollutants is defined as the form parameter of the Pareto distribution and estimated from dye tracer experiments. The Pareto distribution appears as the limit distribution of the extreme value theory, which has been applied to an idealised model of drops that run along a path. The properties of the risk index are investigated by a Monte Carlo study, where the paths are modelled by means of Gaussian random fields. The method is applied to three profiles obtained from Brilliant Blue tracer experiments of the soil physics group at ETH Zurich. It is shown that a single profile can be rather well characterised by the risk index. However, due to the high variability of the dye tracer profiles, an estimated number of at least 15 profile pictures are necessary to characterise a soil.

Dieser Datensatz wurde nicht während einer Tätigkeit an der Universität Mannheim veröffentlicht, dies ist eine Externe Publikation.

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