Norwegian case study: Optimal combination of future stormwater measures
The Norwegian case will demonstrate the use of eco-engineered grey-green solutions for rooftops, permeable pavements and rain gardens to handle stormwater. The technical performance for each solution will be taken from different pilot projects associated to EviBAN and serve as input to the optimalisation and SES analysis developed and performed within the EviBAN project.
The Norwegian case is centred around the ZEB Laboratoriet that is currently built at the NTNU campus. To meet regulations on stormwater run-off from the site, this new site will have a variety of stormwater measures installed, i.e. multiple rain gardens, permeable pavements and a combined detention/storage tank. The stormwater system will be instrumented and may serve as a good site to calibrate/validate any system models. However, there is also a large campus project running, targeting an increase in the building mass around 92 000 m2 over the next decade, and one of many possible sites available for new buildings is just upstream of the ZEB Laboratoriet.
A heavy densification and closing of natural infiltration areas and flood pathways will most certainly affect the ZEB Laboratoriet and the key question is what would the optimal combination of stormwater measures on the new campus site be to meet both regulations and reduce the risk for flooding of the ZEB Laboratoret.