"The municipalities may benefit of our research with gaining a clearer picture of how we can either plan and build a greener infrastructure for stormwater in the cities of the future", says Hendrik Rujner.
The design of common elements of green infrastructure like vegetated swales varies among jurisdictions and more or less follows local experience reflecting physical conditions like local soils. As a consequence, the environmental performance of swales varies from case to case, and is subject to significant uncertainty. For the advancement of urban drainage systems, where swales are understood as amongst other components, knowledge about their flow reductions and ability to dely flowsis essential. As the swale hydrology is mainly controlled by soil conditions - and ultimately soil moisture, this is investigated during field experiments assessing swale flow processes.
"In city centers, the most densely and compact, curbs, gutters and pipes are used for removal of stormwater. But in urban peripheral areas, ordinary swales perform the same function as both a more sustainable and cheaper alternative", says Hendrik Rujner.
Photo: Richard Renberg
In these field measurements runoff is measured based on different, simulated rainfall events soil type and soil moisture conditions. At a later stage hydrological modeling and GIS analysis will be performed.
The project "Green nano" is financed by Vinnova.