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Gewählte Master / Diploma Thesis:

Fabian Mühlbacher (2021): Beitrag zur Integration von Hangwassermodellen für den hydraulischen Nachweis in der Siedlungsentwässerung.
Master / Diploma Thesis - Institut für Siedlungswasserbau, Industriewasserwirtschaft und Gewässerschutz (SIG), BOKU-Universität für Bodenkultur, pp 119. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Due to Urbanisation and heavy storm events a lot of urban drainage systems are brought to their limit of resilience. To fulfil their duty of wastewater drainage in terms of community hygiene and flood protection, these historically grown sewer systems must continuously develop. There are two technical sets of rules in Austria to prove the performance of these drainage systems. The ÖWAV Regelblatt 11 is handling hydraulic issues, while the ÖWAV Regelblatt 19 deals with the dimensioning of combined sewer overflows. In this study a 1D hydrodynamic drainage model is coupled with a 2D hydrodynamic overland flow model and the coupled model is checked for its applicability in the previously mentioned sets of rules. It could be demonstrated that the integration of overland flow models into the hydraulic proof of urban drainage systems can usually make a positive contribution. From today’s perspective, however, the verifications in accordance with the ÖWAV Regelblatt 19 are hardly feasible with coupled models. It was also found that the choice of coupling parameters plays a major role in terms of the quality of the results and that these parameters are not easy to determine. A comparison of the sewer overflow and flooding behaviour has shown that coupled models are suitable for directly assessing the frequency of flooding. A proof using the proxy sewer overflow is therefore no longer necessary and the functional requirement “protection against sewer induced flood” from the ÖNORM EN 752 can be judged using the direct criteria of the flooding frequency. With this work and through the comprehensive flood analysis, a further step in the direction of a holistic consideration of the water cycle in models could be taken.

Beurteilende*r: Ertl Thomas

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