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Gewählte Master / Diploma Thesis:

Daniel Doerr (2011): Simulation des Einflusses von Abflussereignissen auf die Stabilität der Uferböschungen im Nationalpark Donau-Auen.
Master / Diploma Thesis - Institut für Wasserwirtschaft, Hydrologie und konstruktiver Wasserbau (IWHW), BOKU-Universität für Bodenkultur, pp 216. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The aim of this master thesis is to explore the effect of flow events on the stability of riverbanks and to analyse the riverbank failure as one of the most important processes concerning bank erosion. As the riverbank stability changes with pore water pressures, it is necessary to study the pore water distribution. For this purpose a site appropriate for monitoring the bank hydrology was selected in the national park “Donau-Auen”. The investigated soil consists of several layers of fine grained flood sediment from the Danube with underlying gravel. The soil parameters were determined in laboratory and field measurements. Together with the monitoring data, the resulting parameters served as input data for a simulation of water seepage and riverbank stability during observed flow events. Moreover the maximum possible bank heights and overhang widths were determined for different sediments and pore water pressures. The results showed that pore water pressures significantly influence bank stability. The partially vertical banks at the study site were recognized to be stable only due to the effect of apparent cohesion. Negative pore water pressures allow formation of overhangs of up to 30 cm width in otherwise cohesionless sediment. During flow events, the bank stability showed to be lowest during drawdown conditions after the flow peak.

Beurteilende(r): Habersack Helmut
1.Mitwirkender: Klösch Mario

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