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Advancing green infrastructure design: Field evaluation of grassed urban drainage swales
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0002-2321-164X
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water. Unit of Environmental Engineering, University of Innsbruck.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
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Number of Authors: 5
2016 (English)In: Novatech proceedings 2016, 2016Conference paper (Refereed)
Abstract [en]

Grassed drainage swales, which represent common elements of urban green infrastructures, are designed for different soils, flow capacities, dimensions, slopes and vegetation. Their design is often based on local experience rather than technical guidelines, and consequently, the design and performance of grassed swales, with respect to flow capacity and stormwater management objectives may significantly vary from one jurisdiction to another. To improve this situation and reduce design uncertainties, a field study of grassed swales was conducted by assessing their hydrologic performance. A 30-m section of an urban grassed swale in sandy soils, located in the City of Luleå (Northern Sweden), was equipped with a mobile water supply system and instrumented for measuring swale flow characteristics. The water supply system comprised five containers (~ 1 m3 each) providing controlled longitudinal and lateral inflows into the tested swale section. These inflows were selected to mimic stormwater runoff from a typical drainage area. At the first test site, 14 rainfall events of 30- minute duration were simulated and the resulting swale flows and soil moisture conditions were measured. The experimental variables addressed included wet and dry antecedent conditions, and three inflow rates. The preliminary results indicate that the degree of swale inflow attenuation depended on the magnitude of runoff inflow, on the initial soil moisture conditions and that significant volumes of water can be stored and transmitted during the stormwater drainage process.

Place, publisher, year, edition, pages
2016.
Keyword [en]
Vegetated swale, hydrologic performance, soil moisture, urban green infrastructure design
National Category
Other Environmental Engineering Water Engineering
Research subject
Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-60341OAI: oai:DiVA.org:ltu-60341DiVA: diva2:1046090
Conference
9th International Conference on planning and technologies for sustainable management of Water in the City, Lyon France, June 28 - July 1, 2016
Projects
GrönNano
Funder
VINNOVA, 1773246
Available from: 2016-11-11 Created: 2016-11-11 Last updated: 2016-11-29Bibliographically approved

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Rujner, HendrikLeonhardt, GüntherPerttu, Anna-MariaMarsalek, JiriViklander, Maria
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