Zur gekoppelten numerischen Modellierung von unterirdischem Hochwasser
type: CreativeWork
description: A subsurface flood is defined as a groundwater head rise induced by high water in a river. While in the river the flood wave decays comparatively fast, the duration of the subsurface event is usually longer. Substantial unfavourable consequences of the underground flood is damage to buildings and infrastructure caused by increased uplift forces and the penetration of water into buildings. At the surface, the water movement can be mathematically described by the Navier-Stokes equations or simplifications of these equations. As a programme to model the movement of water on an inundated area, Ilmoflood is presented. For the subsurface, the Richards equation and the groundwater flow equation are appropriate. The Feflow groundwater simulation programme solves these two equations numerically. Between the water at the land surface and groundwater, bank storage, infiltration of water from an inundated area and return flow act as interchange processes. Thus, in order to predict the subsurface flood propagation, it is necessary to couple a surface flow model with a groundwater model. One focus of this dissertation work is the model coupling of Feflow and Ilmoflood with the OpenMI standard. The main challenge was to implement this standard into the commercial programme Feflow without changing the source code. This has been achieved with the help of network programming methods implemented into the Feflow programming interface. It is now possible, to use groundwater models already existing, which for example have been developed for water supply purpose, for the planning of flood protection measures. Against this background, it is investigated how the interchange processes can be modelled best with the available programme functions. For the bank storage process, field data from the literature for one subsurface flood event is analysed and in addition, numerical model investigations are carried out. The infiltration process is analysed with the help of analytical infiltration mode…
abstract: A subsurface flood is defined as a groundwater head rise induced by high water in a river. While in the river the flood wave decays comparatively fast, the duration of the subsurface event is usually longer. Substantial unfavourable consequences of the underground flood is damage to buildings and infrastructure caused by increased uplift forces and the penetration of water into buildings. At the surface, the water movement can be mathematically described by the Navier-Stokes equations or simplifications of these equations. As a programme to model the movement of water on an inundated area, Ilmoflood is presented. For the subsurface, the Richards equation and the groundwater flow equation are appropriate. The Feflow groundwater simulation programme solves these two equations numerically. Between the water at the land surface and groundwater, bank storage, infiltration of water from an inundated area and return flow act as interchange processes. Thus, in order to predict the subsurface flood propagation, it is necessary to couple a surface flow model with a groundwater model. One focus of this dissertation work is the model coupling of Feflow and Ilmoflood with the OpenMI standard. The main challenge was to implement this standard into the commercial programme Feflow without changing the source code. This has been achieved with the help of network programming methods implemented into the Feflow programming interface. It is now possible, to use groundwater models already existing, which for example have been developed for water supply purpose, for the planning of flood protection measures. Against this background, it is investigated how the interchange processes can be modelled best with the available programme functions. For the bank storage process, field data from the literature for one subsurface flood event is analysed and in addition, numerical model investigations are carried out. The infiltration process is analysed with the help of analytical infiltration mode…
author: Becker, Bernhard Peter Josef
language: ger
keywords: info:eu-repo/classification/ddc/620, Hochwasser, Grundwasser, Infiltration, Ingenieurwissenschaften, unterirdisches Hochwasser, Qualmwasser, Uferspeicherung, OpenMI, subsurface flood, leakage, bank storage, Feflow
date published: 2010
date modified: 2026-07-30T19:43:35Z
provider: RWTH Aachen University
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: Publikationsserver der RWTH Aachen University