Verification of the Stormwater Drainage System Overloads in Wrocław for an Assessment of Climate Change Effects

  • Monika Nowakowska Wroclaw University of Technology,Faculty of Environmental Engineering
  • Katarzyna Wartalska Wroclaw University of Technology,Faculty of Environmental Engineering
  • Bartosz Kaźmierczak Wroclaw University of Technology, Faculty of Environmental Engineering
  • Andrzej Kotowski Wroclaw University of Technology,Faculty of Environmental Engineering

Abstract

This paper presents a verification of the performance of the stormwater drainage system in Gaj and Tarnogaj residential developments in Wrocław with regard to climate changes, by means of a calibrated hydrodynamic model created within the SWMM software. The verification was carried out for two criterial rainfalls: the Euler model rainfall with occurrence frequency C = 3 years and an actual rainfall with C = 5 years. Two parameters: degree of flooding (DOF) and specific flood volume (SFV) were adopted to indicate potential system overloads. The simulations showed numerous outflows from the sewers, which means, that the investigated system needs adapting to climate changes. The causes of this should be sought in the too small diameters of the sewers and so in the insufficient hydraulic capacity of the sewerage system dimensioned in the past using methods which are inadequate today.

Keywords: urban hydrology, rainwater, hydrodynamic modelling, stormwater management model
Published online
2019-02-13
How to Cite
Nowakowska, M., Wartalska, K., Kaźmierczak, B., & Kotowski, A. (2019). Verification of the Stormwater Drainage System Overloads in Wrocław for an Assessment of Climate Change Effects. Periodica Polytechnica Civil Engineering, 63(2), 641-646. https://doi.org/10.3311/PPci.12668
Section
Technical Notes