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Gewählte Master / Diploma Thesis:

Lukas Ramsl (2018): EXTENSIVE DACHBEGRÜNUNG MIT STANDORTGERECHTEM SAATGUT INNERALPINER HERKÜNFTE UNTERSUCHUNGEN AM STANDORT DER HÖHEREN BUNDESLEHR- UND FORSCHUNGSANSTALT RAUMBERG-GUMPENSTEIN IN RAUMBERG.
Master / Diploma Thesis - Institut für Ingenieurbiologie und Landschaftsbau (IBLB), BOKU-Universität für Bodenkultur, pp 189. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Abstract:
The present work deals with the investigation of extensive green roofs, sepcifically of different seed mixtures, different construction variants, problems with diaspore entry, the influence of a photovoltaic system on the surrounding vegetation as well as the water retention capacity. The investigations were carried out on existing green roofs from 2014 and 2016 at the site of the Higher Federal and Research Institute Raumberg-Gumpenstein. The vegetation analyses showed that the use of a water storage plate compared to a drainage layer from Liadrain 8/16 leads to significantly lower coverages in these test areas. Furthermore, it could be determined that a photovoltaic system has a significant influence on the growth of the surrounding vegetation. Above all, the results of the average leaf heights showed this clearly. The favorable location between the panels meant that the non-sown areas were relatively quickly populated by vegetation, including woody plants who damage the roof seal. In general, foreign seed entry played a minor role on the monitored roof surfaces. In contrast, an increased incidence of legumes and mosses was measured on the trial sites installed in 2014. This indicates changes in site conditions (humid conditions, poor nutrient supply) and, consequently can lead to increased care costs. Vegetation from the three seed mixtures usedon the trial plots from 2014 did not indicate any significant differences. With respect to the retention performance of an extensive roof, a 7 cm limestone shell and 4 cm bricks drainage construction demonstrated an average water retention of 10,5 l/m² (twelve hour test duration, 20 l/m² Input). This confirms that green roofs play an important role in rainwater retention and contribute passive flood protection.

Beurteilende(r): Stangl Rosemarie
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