Stofftransportvorgänge in Festgesteinsaquiferen: Analyse von Tracerdurchbruchskurven zur Identifikation eines geeigneten Mehrkontinuum-Ansatzes
type: CreativeWork
description: Characterizing flow and transport processes in fracured porous media is an essential issue to the modeling and experimental community. This thesis focuses on the analyzis of tracer breakthrough curves in such media. The basic idea is to develop a method which allows for using tracer pulses as boundary conditions with respect to transport and transforming the given signal (breakthrough curve) of the efluent to that signal provided by infinite tracer injection. The necessity for this transformation arises because of the better comparibility for breakthrough curves due to continuous injection. For those breakthrough curves a variety of studies has been performed identifying the number of components relevant for flow and transport in fractured porous media. In this thesis now a method to transform pulse signals to continuous signals and corresponding criteria for validity is presented. The transformed signals are then used to characterize the medium under consideration. With this characterization (i.e. single porous and single permeable, double porous and single permeable, double porous and double permeable, etc.) a multicontinuum approach is chosen. The results of the multicontinuum model are then compared to those of a discrete modeling approach. The data of the discrete model are supposed to be the field data.
abstract: Characterizing flow and transport processes in fracured porous media is an essential issue to the modeling and experimental community. This thesis focuses on the analyzis of tracer breakthrough curves in such media. The basic idea is to develop a method which allows for using tracer pulses as boundary conditions with respect to transport and transforming the given signal (breakthrough curve) of the efluent to that signal provided by infinite tracer injection. The necessity for this transformation arises because of the better comparibility for breakthrough curves due to continuous injection. For those breakthrough curves a variety of studies has been performed identifying the number of components relevant for flow and transport in fractured porous media. In this thesis now a method to transform pulse signals to continuous signals and corresponding criteria for validity is presented. The transformed signals are then used to characterize the medium under consideration. With this characterization (i.e. single porous and single permeable, double porous and single permeable, double porous and double permeable, etc.) a multicontinuum approach is chosen. The results of the multicontinuum model are then compared to those of a discrete modeling approach. The data of the discrete model are supposed to be the field data.
author: Lagendijk, Vincent Robert
language: ger
keywords: info:eu-repo/classification/ddc/620, Kluftgrundwasserleiter, Grundwasserstrom, Stoffübertragung, Tracer, Durchbruchskurve, Ingenieurwissenschaften, Mehrkontinuum, charakteristische Kurven, geklüftet poröse Medien, numerische Simulation, Geohydrologie, Tracerdurchbruchskurve, Faltungssatz
date published: 2004
date modified: 2026-07-30T19:43:19Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University