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Seasonal variations in infiltration in cold climate raingardens - a case study from Norway

Balstad, Sondre; Lohne, Jardar; Muthanna, Tone Merete; Sivertsen, Edvard
Journal article, Peer reviewed
Published version
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Balstad (318.8Kb)
URI
http://hdl.handle.net/11250/2595604
Date
2018
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  • Institutt for bygg- og miljøteknikk [5151]
  • Publikasjoner fra CRIStin - NTNU [41957]
Original version
Vann. 2018, (1), 5-14.  
Abstract
Winter infiltration in cold climate raingardens is a key function for proper year-round function. The Modified Phillip-Dunne Infiltrometers (MPD) procedure was used for measuring the infiltration capacity. The research was based on a case study approach, combining field measurements and simulations. The results were compared to results from the literature about raingardens in cold climates. Saturated hydraulic conductivity (Ksat) provides a measure of infiltration capacity and is recommended to be >10 cm/h in cold climate raingardens. The results show a seasonal variation in Ksat, from 1 cm/h (October) to 0.05 cm/h (November-April). Simulation of a raingarden in Trondheim, show a decrease in infiltrated inflow from 75 % to 25 % in the raingarden when Ksat goes from 1 cm/h to 0.05 cm/h. This paper presents a winter adaptation of the MPD-method.
Publisher
Norsk Vannforening
Journal
Vann

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