Economic development and population growth under conditions of globalization have materialized in an extended urbanization on a planetary scale, resulting in hazardous effects on the natural environment and climate change, for instance in more frequent extreme precipitation events. For mitigation purposes, sustainable development has been prioritized in many industries. Therefore, this master thesis investigates contributions to sustainable design solutions for controlled drainage of precipitation water. All Slovenian regulations that deal with sewage systems require prioritizing the percolation of precipitation water where possible in order to avoid the burden of mixed sewage systems and associated facilities. However, European standards (EN), as well as Slovenian, do not specifically address the design of percolation systems and swales. Therefore, this thesis presents the dimensioning of percolation systems and swales according to the German standard DWA-A 138E and the recommendations for designing of the CIRIA C753 manual. Accordingly, a system of precipitation water drainage from the FGG and IHR surfaces on Hajdrihova Street in Ljubljana was designed. Based on this case, instructions of the standards and manual are compared and analyzed. The design process of percolation systems in the case of percolation pools, modular percolation blocks and concrete percolation shafts is presented. The selected system of modular percolation blocks is designed according to the DWA-A standard regulations, with outflow of excess water in case of extreme rainfall events to Gradaščica, due to prevention of the owerflowing of the system.
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