Infiltration Capacity of Rain Gardens Using Full-Scale Test Method: Effect of Infiltration System on Groundwater Levels in Bergen, Norway

Rain gardens at Bryggen, Bergen, Norway, demonstrate exceptional infiltration capacity, significantly exceeding requirements for cold climates. Full-scale tests revealed infiltration rates of 510–1600 mm/h, surpassing small-scale estimates (245–404 mm/h). The study highlights the system's dual role in stormwater retention and groundwater replenishment, with immediate impacts on nearby wells (<30 m) and delayed effects (ca. 2 days) in distant ones (75–100 m). These findings suggest potential for larger drainage area integration while protecting Bryggen's culturally significant organic layers. The research evaluates SuDS efficiency under extreme conditions (40 m³ water volumes), offering insights into urban hydrological dynamics.

Venvik, G., & Boogaard, F. (2020). Infiltration Capacity of Rain Gardens Using Full-Scale Test Method: Effect of Infiltration System on Groundwater Levels in Bergen, Norway. Land, 9(12), 520. https://doi.org/10.3390/land9120520