In Finland urban wetlands are being implemented to help improve water quality, absorb storm water volume and flow control, and improve the land-water habitats for urban communities. The wetlands are designed to respond to the needs and negative impacts of urbanization and therefore, public acceptance and multifunctional benefits are central to the design and implementation of the wetlands. The acceptance and understanding of the importance of urban dwellers is important and thus the project sought to demonstrate several benefits of functional wetlands.
Flash floods are induced by heavy, often local, precipitation or sudden snow melt or combination of both. It is characterised by fast onset (minutes to hours after a causative event), a heavy multiplication of discharge and high flow velocities and is often accompanied by large sediment and debris flow.