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Institut für Wasserbau - IWS

Selected Topics and International Network Lectures

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Donnerstag
26.04.2007
16:00 Uhr
Anongnart Assteerawatt, M.Sc.
Lehrstuhl für Hydromechanik und Hydrosystemmodellierung

"Modelling Fractured Systems: Geo-Statistical and Stochastic Fracture Generation"

By applying a discrete model approach to study flow and solute transport processes in a fractured system, the effect of indiviual fractures can be explicitely investigated. The critical step for a discrete fracture model is the generation of a ``representative'' fracture network that can accurately capture the behavior of a fractured aquifer system. The stochastic fracture generation rely on the statistical distribution of fracture geometries, such as orientation, density, aperture or length, however, not the spatial connectivity between fractures. In this talk, the geo-statistical fracture generator which accounting for both fracture geometries and the spatial connectivity will be presented and its results will be compared with the one from the stochastic fracture generation.

Based on the geostatistic approach, different realizations of the same descriptions can be generated, hence, an overall behavior of the fracture-matrix system have to be investigated from many realizations which means high computational demand. Due to this, the streamline method is an attractive alternative to overcome the computational cost. The streamline approach for solute transport in a fracture-matrix system will presented and the results will be discussed and compared with the results obtained from solving a mass conservative transport equation.