The experiment of the effects of rainfall intensity and substrate depth of an extensive vegetated roof

This is the authors' abstract. We don't add key points for this paper.

Nowadays, extreme precipitation events are becoming more and more prevalent, which, in somesituations, can cause serious problems and damage. To avoid the impacts of extreme rainfall events,blue-green infrastructure elements are used to retain and slow down stormwater runoff. Examples arevegetated (green) roofs, widely considered a promising nature-based solution for urban stormwatermanagement.This experiment is focused on studying the influence of the retention capacity and the depth of theselected commercial substrate of extensive vegetated roofs. The rainfall intensity testing aims todemonstrate and explore new insights into vegetated roofs during severe extreme precipitation. Theactual experimental process was performed under laboratory conditions, where extreme rainfallintensities (2 - 4 mm/min) with a duration of 15 minutes were subsequently simulated using a rainfallsimulator. The main identifier of the quality and capability of the substrate used on the vegetated roofis the amount of runoff captured from the simulated rainfall intensity. The measured outputs will beused as inputs to predictions reducing stormwater runoff. The knowledge gained and the differentvariations of the simulations can significantly help in constructing and designing vegetated roofs andeffective urban stormwater management.