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Spread of Water-Borne Pollutants at Traffic Accidents on Roads
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Land and Water Resources Engineering.
2017 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 228, no 9, 323Article in journal (Refereed) Published
Abstract [en]

Traffic accidents sometimes lead to the spread of hazardous compounds to the environment. Accidental spills of hazardous compounds on roads in the vicinity of vulnerable objects such as water supplies pose a serious threat to water quality and have to be assessed. This study compared three different assessment methods, electrical resistivity measurements, analytical flow calculations, and 1D and 2D dynamic flow modeling, to describe rapid transport processes in the road shoulder and roadside verge after a major spill. The infiltration and flow paths of water-borne substances were described during simulated discharge of pollutants on different road types. Full-scale tracer tests using sodium chloride were carried out at nine different road locations in Sweden. Analysis of grain size distribution and infiltrometer tests were carried out at the road shoulder and verges. The pathways and travel times were traced using resistivity measurements and 3D inverse modeling. The resistivity measurements were compared to analytical flow calculations and 1D and 2D dynamic modeling. All measurement sites were highly heterogeneous, which caused preferential flow. Vertical flow velocities of 1.4-8.6 x 10(-4) m/s were measured. The results of the analytical calculations and flow modeling were of the same order of magnitude. The measurements showed that almost all infiltration goes directly into the road embankment, hence the composition and structure of the built-up road must be considered. The non-destructive resistivity measurements and 3D modeling provided useful information for clarifying the infiltration and flow pattern of water-borne compounds from road runoff.

Place, publisher, year, edition, pages
SPRINGER , 2017. Vol. 228, no 9, 323
Keyword [en]
Road, Pollution, Electrical resistivity, Infiltration, Modeling
National Category
Environmental Sciences Oceanography, Hydrology and Water Resources
Identifiers
URN: urn:nbn:se:kth:diva-215468DOI: 10.1007/s11270-017-3477-3ISI: 000410827400006PubMedID: 28845063Scopus ID: 2-s2.0-85027395214OAI: oai:DiVA.org:kth-215468DiVA: diva2:1149852
Note

QC 20171017

Available from: 2017-10-17 Created: 2017-10-17 Last updated: 2018-01-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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