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Processes improving urban stormwater quality in grass swales and filter strips: A review of research findings
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten.ORCID-id: 0000-0003-0367-3449
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten.ORCID-id: 0000-0001-9938-8217
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Arkitektur och vatten.ORCID-id: 0000-0003-1725-6478
2019 (engelsk)Inngår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 669, s. 431-447Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Increasing interest in urban drainage green infrastructure brings attention to grass swales and filter strips (GS&GFS) and their role in stormwater management. While the understanding of the hydrology and hydraulics of these stormwater control measures is adequate for current needs, there are knowledge gaps in understanding the water quality processes in GS&GFS and such a finding motivated preparation of the review paper that follows. The review revealed that most of the empirical studies of GS&GFS flow quality focused on the removal of pollutants associated with road runoff, and particularly solids, with relatively few studies addressing nutrients, traffic associated hydrocarbons, oxygen demanding substances, chloride, and faecal indicator bacteria. The reported results suffer from limitations caused by experimental conditions often representing a steady flow used to irrigate GS&GFS and generate runoff, non-submerged flows, no lateral inflows along swale side slopes, constant dosing of solids, emphasis on larger-than-typical solids, incomplete descriptions of experimental conditions, and limited attention to experimental uncertainties. Besides settling, other treatment processes, like adsorption/desorption, plant uptake, chemical precipitation and microbial degradation are often acknowledged, but without attempting to quantify their effects on flow quality. The modelling of GS&GFS flow quality would be beneficial for an improved understanding of green urban drainage infrastructure, but currently it is infeasible without a better knowledge of stormwater quality processes in GS&GFS facilities.

sted, utgiver, år, opplag, sider
Elsevier, 2019. Vol. 669, s. 431-447
Emneord [en]
Green infrastructure, Pollutant transport, Runoff treatment, Stormwater management, SolidsTrace metals
HSV kategori
Forskningsprogram
VA-teknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-73262DOI: 10.1016/j.scitotenv.2019.03.072PubMedID: 30889442Scopus ID: 2-s2.0-85063001613OAI: oai:DiVA.org:ltu-73262DiVA, id: diva2:1297765
Merknad

Validerad;2019;Nivå 2;2019-03-21 (johcin)

Tilgjengelig fra: 2019-03-21 Laget: 2019-03-21 Sist oppdatert: 2019-04-05bibliografisk kontrollert

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Gavric, SnezanaLeonhardt, GüntherMarsalek, JiriViklander, Maria

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