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Gewählte Doctoral Thesis:

Oliver Weiss (2021): VON EVAPOTRANSPIRATION BIS TECHNISCHE SUBSTRATE – ALTERNATIVE LÖSUNGEN FÜR NACHHALTIGES REGENWASSERMANAGEMENT.
Doctoral Thesis - Institut für Ingenieurbiologie und Landschaftsbau (IBLB), BOKU-Universität für Bodenkultur, pp 103. UB BOKU obvsg FullText

Abstract:

Due to increasing urbanization, sealing and the increasing negative impact of climate change, such as long-lasting dry periods, heat and heavy rainfall events, Green Infrastructure (GI) in cities is becoming more and more important. Due to heavy rainfall events, there is a significant increase in the amount of precipitation occurring in shorter periods of time. Previous standard solutions in the field of stormwater management are not applicable to those challenges. Therefore, to tackle this problem, engineered soils for GI are investigated considering two features essential for their application within this work: a) the evapotranspiration performance of engineered soils, by creating an equation for the calculation of evapotranspiration is presented; b) the suitability of selected engineered soils in comparison to standard solutions is tested for vegetated seepage troughs. Within this work it can be demonstrated that previous equations for calculating evapotranspiration are unsuitable for application to engineered soils. These equations only provide correct results if applied under the same conditions they were developed in. By using the presented methodology, a simple equation for an initial estimation of evapotranspiration can be created for any engineered soil with/ without planting. In the application of selected engineered soils in a field test in the seepage trough, clear differences between the previous standard solutions and the engineered soils were found. The reference soils greened with standard turf seed mix cannot be recommended, instead, the newly designed engineered soils in combination with the seed mixes flower turf and flower meadow show the best results in comparison and are suitable for future applications in seepage troughs. These two parts of the work should provide valuable basic knowledge for planners. Thus, this work provides a new basis for the effective use of engineered soils in stormwater management.

Betreuer: Pitha Ulrike

1. Berater: Stangl Rosemarie

2. Berater: Mursch-Radlgruber Erich