Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Generic soil descriptions for modelling water and chloride dynamics in the unsaturated zone based on Swedish soils
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
2009 (English)In: Geoderma, ISSN 0016-7061, E-ISSN 1872-6259, Vol. 150, no 1-2, 85-95 p.Article in journal (Refereed) Published
Abstract [en]

Information about soil hydraulic properties is a prerequisite for modelling water and solute dynamics in the unsaturated zone. Providing that this information is available and the uncertainty is within an acceptable range, computer models can be helpful tools in quantifying environmental effects. This study describes the water retention curve and hydraulic conductivity for three soil types: clay, glacial till and sand. These soils originated from a Swedish database containing 2200 measured soil layers representing 260 soil profiles. A simulation experiment was conducted where daily variations in water and chloride were simulated for a 20-year period in central Sweden, using the different soil profiles sampled from the database. Two approaches to calculate effective parameters were tested, in order to obtain generic soil descriptions and examine their ability to represent the average of the variation in chloride and water characteristics obtained for the respective soil type. In general, the use of these effective parameters was successful but overestimations of the water and chloride outflow occurred in the clay, which presented high spatial variability, and of the chloride concentration in the sand, which presented high temporal variability. Overall, the generic soil descriptions were useful in producing reasonable behaviour regarding water and chloride dynamics and could be recommended for general assessments of the environmental impact of non-reactive solutes from ;areas where simplified soil classifications are available.

Place, publisher, year, edition, pages
2009. Vol. 150, no 1-2, 85-95 p.
Keyword [en]
Effective parameters; Modelling; Soil database; Soil hydraulic properties; Water retention curve; EFFECTIVE HYDRAULIC PARAMETERS; SPATIALLY-VARIABLE FIELDS; PEDOTRANSFER FUNCTIONS; VERTICAL FLOW; BULK-DENSITY; GROUNDWATER; BALANCE; SCALE; CONDUCTIVITY; UNCERTAINTY
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-7922DOI: 10.1016/j.geoderma.2009.01.014ISI: 000265342800010Scopus ID: 2-s2.0-62049084865OAI: oai:DiVA.org:kth-7922DiVA: diva2:13096
Note
QC 20100526Available from: 2008-01-28 Created: 2008-01-28 Last updated: 2010-09-16Bibliographically approved
In thesis
1. Monitoring transport and fate of de-icing salt in the roadside environment: Modelling and field measurements
Open this publication in new window or tab >>Monitoring transport and fate of de-icing salt in the roadside environment: Modelling and field measurements
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

Roads and traffic are a major non-point source of pollutants and may have severe impacts on surface water, groundwater, soil and vegetation. In cold climates, de-icing salt is one such pollutant that may cause increased chloride concentrations and induce other effects on the environment. Monitoring and quantifying environmental effects are crucial for governing decisions towards more suitable use of de-icing salt in order to achieve and maintain good environmental status around roads. This thesis presents an operational modelling tool for monitoring the transport and fate of de-icing salt in the roadside environment in order to quantify changes in the environment at various spatial and temporal scales, using salt application data, meteorological data, geology and generic descriptions of hydrogeological environments as main inputs. A combination of modelling and various independent field measurements provided an efficient means for evaluating and describing the spread of de-icing salt from the road to the surroundings, the deposition of salt and ploughed snow in the roadside, and the corresponding increase in chloride concentration in soil and groundwater. Both the spatial and seasonal variation in soil chloride concentration were significantly affected by de-icing salt application. The importance of type of soil, vegetation type, groundwater conditions and distance from the road was clearly demonstrated for modelling the transport and fate of de-icing salt in the roadside environment. Salt emissions from the road by surface runoff were estimated at 50-80% of applied salt and transport by snow ploughing and air emissions at 20-50%. The uncertainty in the spatial distribution of snow and salt deposition close to the road was high and a previous proposed exponential decline in salt deposition with distance from the road could not be justified within a couple of metres from the road. Future monitoring should include both modelling and systematic data collection in order to reduce the uncertainty in predictions of the environmental impact of de-icing salt. Modelling of chloride concentration, soil water content and soil temperature and measurements of electrical resistivity may be a cost-effective solution for quantifying changes in the roadside environment.

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. xii, 32 p.
Series
Trita-LWR. PHD, ISSN 1650-8602 ; 1038
Keyword
Chloride, De-icing salt, Groundwater, Modelling, Monitoring, Road, Roadside, Soil water
National Category
Oceanography, Hydrology, Water Resources
Identifiers
urn:nbn:se:kth:diva-4615 (URN)978-91-7178-861-0 (ISBN)
Public defence
2008-02-15, F3, Lindstedtsvägen 26, Stockholm, 13:00 (English)
Opponent
Supervisors
Note
QC 20100526Available from: 2008-01-28 Created: 2008-01-28 Last updated: 2011-11-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Lundmark, AnnikaJansson, Per-Erik
By organisation
Land and Water Resources Engineering
In the same journal
Geoderma
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 81 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf