Change search
ReferencesLink to record
Permanent link

Direct link
Seasonal variation of road runoff in cold climate
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.
2005 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

The main objective of this thesis was to characterize and study the behaviour and transport of pollutants, i.e., suspended solids, particles and heavy metals, in road runoff from a small urban catchment during snowmelt and rainfall. The result will constitute a basis for essential considerations concerning the selection and design of environmental management practices and techniques in a cold climate. In regions with cold climate the urban drainage and highway runoff processes become much more complex, compared to temperate regions. The effects that runoff has on receiving waters seem to be particularly severe during snowmelt and rain-on-snow in cold climates. Therefore, climatic conditions should be taken into account in planning and design of BMPs and snow handling strategies. To increase the knowledge of seasonal variations of road runoff quantity and quality, measurements were carried out at a field site during melt and rain periods, year 2000 and 2001. The field site was a road with 7400 vehicles/day, in the central parts of Luleå in northern Sweden. Runoff samples were analysed for suspended solids (SS), particle-size distribution, total and dissolved heavy metals (Pb, Cu, Cd, Ni and Zn), pH, and conductivity. The results showed higher concentrations of SS, particles, and heavy metals for the melt period, as compared to the rain period, and the highest concentrations were found during the rain-on-snow events. The results indicated a flow dependent increase in the concentration of suspended solids during the melt period. The mass load for suspended solids, particles, and heavy metals was higher for the melt period than for the rain period. On the contrary, dissolved heavy metal loads were higher during the rain period. Metal elements during the melt period were more particulate bound as compared to the rain period characterised by a higher percentage of the dissolved fraction. During the melt period, investigated particle sizes and TSS were highly correlated with total concentrations of Cd, Cu, Ni, Pb, and Zn. During the rain period, the correlations between total metal concentrations and the different particle sizes were not as significant. It was shown that the modified degree-day method is inadequate to describe the snowmelt dynamics well. The build-up and transport of fine and coarse suspended solids should be improved during snowmelt conditions. Despite a simple model concept, it was possible to describe the dynamics of road runoff and suspended solids rather well, based on the continuous course of events for the whole modelling period. However, if the model were used for simulating a snowmelt period or single events during snowmelt, the model approach would be too simple.

Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2005. , 23 p.
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757 ; 2005:13
Research subject
Urban Water Engineering
URN: urn:nbn:se:ltu:diva-26167Local ID: cfc83a50-9a3d-11db-8975-000ea68e967bOAI: diva2:999326
Godkänd; 2005; 20070102 (haneit)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

Open Access in DiVA

fulltext(4065 kB)0 downloads
File information
File name FULLTEXT01.pdfFile size 4065 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Westerlund, Camilla
By organisation
Architecture and Water

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

ReferencesLink to record
Permanent link

Direct link