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Article

Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake

1
Fluid Mechanics, Department of Engineering Sciences and Mathematics, Luleå University of Technology, 976 31 Luleå, Sweden
2
Urban Water, Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 976 31 Luleå, Sweden
*
Author to whom correspondence should be addressed.
Water 2020, 12(8), 2080; https://doi.org/10.3390/w12082080
Received: 15 June 2020 / Revised: 14 July 2020 / Accepted: 17 July 2020 / Published: 22 July 2020
(This article belongs to the Special Issue Industrial and Environmental Fluid Mechanics)
An innovative concept of dynamic stormwater storage in sponge-like porous bodies (SPBs) is presented and modelled using first principles, for down-flow and up-flow variants of SPBs. The rate of inflow driven by absorption and/or capillary action into various porous material structures was computed as a function of time and found to be critically dependent on the type of structure and the porous material used. In a case study, the rates of inflow and storage filling were modelled for various conditions and found to match, or exceed, the rates of rainwater inflow and volume accumulation associated with two types of Swedish rainfalls, of 60-min duration and a return period of 10 years. Hence, the mathematical models indicated that the SPB devices studied could capture relevant amounts of water. The theoretical study also showed that the SPB concepts could be further optimized. Such findings confirmed the potential of dynamic SPB storage to control stormwater runoff and serve as one of numerous elements contributing to restoration of pre-urban hydrology in urban catchments. Finally, the issues to be considered in bringing this theoretical concept to a higher Technological Readiness Level were discussed briefly, including operational challenges. However, it should be noted that a proper analysis of such issues requires a separate study building on the current presentation of theoretical concepts. View Full-Text
Keywords: stormwater; storage; sponge-like; porous media; wetting; modelling; first principles; rainfall stormwater; storage; sponge-like; porous media; wetting; modelling; first principles; rainfall
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MDPI and ACS Style

Lundström, T.S.; Åkerstedt, H.O.; Larsson, I.A.S.; Marsalek, J.; Viklander, M. Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake. Water 2020, 12, 2080. https://doi.org/10.3390/w12082080

AMA Style

Lundström TS, Åkerstedt HO, Larsson IAS, Marsalek J, Viklander M. Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake. Water. 2020; 12(8):2080. https://doi.org/10.3390/w12082080

Chicago/Turabian Style

Lundström, T. S., Hans O. Åkerstedt, I. A.S. Larsson, Jiri Marsalek, and Maria Viklander. 2020. "Dynamic Distributed Storage of Stormwater in Sponge-Like Porous Bodies: Modelling Water Uptake" Water 12, no. 8: 2080. https://doi.org/10.3390/w12082080

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