Change search
ReferencesLink to record
Permanent link

Direct link
Nutrient flows following changes in source strengths, land use and climate in an urban catchment, Råcksta Träsk in Stockholm, Sweden
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.ORCID iD: 0000-0002-2829-2928
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.
KTH, School of Architecture and the Built Environment (ABE), Sustainable development, Environmental science and Engineering, Industrial Ecology.ORCID iD: 0000-0002-4530-3414
2016 (English)In: Ecological Modelling, ISSN 0304-3800, E-ISSN 1872-7026, Vol. 338, 69-77 p.Article in journal (Other academic) Published
Abstract [en]

Managing nutrient flows to urban lakes is one of the main challenges to environmental sustainability in cities. Considering that future urban and climate changes may increase the challenge of handling future eutrophication, prediction of future nutrient loadings to aquatic environments in urban catchments has become increasingly important. Based on a new, innovative, structured Substance Flow Analysis (SFA) approach, where a source model was coupled to a Generalised Watershed Loading Functions (GWLF) model, this study investigated nutrient (nitrogen and phosphorus) delivery from sources to a water recipient for an urban catchment, using the case of Råcksta Träsk in Stockholm, Sweden, as an example. Potential effects from future changes in atmospheric deposition, vehicle volume and land use and from climate change (temperature and precipitation) were examined by comparing model scenarios in two periods (2000–2009 and 2050–2059). Model results suggested that climate change may have a greater impact on nitrogen loading to Råcksta Träsk lake than increasing vehicle volume and land use change. In addition, the results suggested that nitrogen loading to the lake may increase taking into account all changes examined, despite the expected decrease in background atmospheric deposition of nitrogen. In contrast, a marginal impact was found for phosphorus loading to the lake under all scenarios examined, resulting in only a slight increase in the combined scenario. From a nutrient pathways perspective, the results suggested that major pathways of nutrient loadings to the lake may not be much affected under most future scenarios examined, although groundwater was found to be a potentially sensitive pathway of nitrogen transport in the climate scenario. The model results provided important information for managers who need to plan for future nutrient handling in urban catchments, and the coupled SFA-GWLF model was suggested to be worthy of further testing at other sites and conditions.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 338, 69-77 p.
Keyword [en]
Substance flow analysis; Urban catchments; Climate change; Urban change; Nutrient loadings; Stockholm
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-186244DOI: 10.1016/j.ecolmodel.2016.08.001OAI: oai:DiVA.org:kth-186244DiVA: diva2:926479
Note

QC 20160810

Available from: 2016-05-07 Created: 2016-05-07 Last updated: 2016-08-10Bibliographically approved
In thesis
1. Systems Perspectives on Modelling and Managing Future Anthropogenic Emissions in Urban Areas: Nitrogen, Phosphorus and Carbon Studies in Stockholm, Sweden
Open this publication in new window or tab >>Systems Perspectives on Modelling and Managing Future Anthropogenic Emissions in Urban Areas: Nitrogen, Phosphorus and Carbon Studies in Stockholm, Sweden
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Managing anthropogenic emissions in urban areas is a major challenge in sustainable environmental development for cities, and future changes and increasing urbanisation may increase this challenge. Systems perspectives have become increasingly important in helping urban managers understand how different changes may alter future emissions and whether current management strategies can efficiently manage these emissions. This thesis provides some systems perspectives that have been lacking in previous studies on modelling and managing future anthropogenic emissions in urban areas. The city of Stockholm, Sweden, was selected as the study site and studies about nitrogen, phosphorus and carbon were chosen, given world-wide urban eutrophication and global concerns about climate change. A substance flow analysis (SFA) structured model, comprising a source model coupled with a watershed model in an SFA structure, was developed to investigate future nutrient loading scenarios under various urban changes in small urban lake catchments. The results demonstrated that climate change potentially posed a greater threat to future nutrient loads to a selected lake catchment in Stockholm than the other scenarios examined. Another SFA-based study on future phosphorus flows through the city of Stockholm indicated that the best management option may depend on the perspective applied when comparing future scenarios of phosphorus flows and that both upstream and downstream measures need to be considered in managing urban phosphorus flows. An evaluation approach for examining current management plans and low-carbon city initiatives using the Driving forces-Pressure-States-Impact-Response (DPSIR) framework, was formulated. With such an evaluation approach, investigation of how well selected plans cover different aspects of the DPSIR framework and whether root causes and systematic measures are highlighted is possible. The results revealed that the current low-carbon city initiative in Stockholm falls within pressure-based, driver-orientated plans and that technical, institutional and cognitional measures are generally well covered. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2016. x, 60 p.
Series
, TRITA-IM-PHD 2016:02, ISSN ISBN 978-91-7595-961-0
Keyword
Anthropogenic emissions, Urban development, Future, Substance flow analysis (SFA), DPSIR.
National Category
Environmental Sciences
Identifiers
urn:nbn:se:kth:diva-186245 (URN)
Public defence
2016-06-02, V2, Teknikringen 76, KTH-Campus, Stockholm, 10:00 (English)
Opponent
Supervisors
Note

QC 20160510

Available from: 2016-05-10 Created: 2016-05-07 Last updated: 2016-05-10Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Wu, JiechenFranzén, DanielMalmström, Maria E.
By organisation
Industrial Ecology
In the same journal
Ecological Modelling
Environmental Sciences

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

Altmetric score

Total: 280 hits
ReferencesLink to record
Permanent link

Direct link