En undersökning av skelettjordskonstruktioner med hydraulisk modellering i MIKE URBAN+ / An investigation of structural soils using hydraulic modeling in MIKE URBAN+
Urbanization with growing and denser cities in combination with climate change requires a smart land use with multifunctional facilities. One such example is structural soils that have a bearing capacity to handle loads, create favorable conditions for trees and handle stormwater with purification and delay. In this study, interviews with municipal employees have been conducted to investigate the use of structural soils today and the division of responsibilities for them. They are often planned with the health of the trees in focus, purification and delay are seen as secondary functions. Delay in structural soil has not been considered when designing stormwater networks. A case study using hydraulic modeling in MIKE URBAN + was conducted to investigate the hydraulic capacity of structural soils and how they can reduce the load on the stormwater network with respect to peak flows, reduced volume and delay. The inclusion of structural soils results in a small reduction in peak flow, flow volume and the hydraulic grade line during the 10- and 30-year rain events. The reason that the structural soils do not give a greater reduction in this case is considered to be because the drainage from the structural soils is too small compared to the total flow volume in the pipe.