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Climate change effects on nitrogen loading to urban lakes: The case of Råcksta Träsk, 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
2013 (English)In: Proceedings of the 6th International Perspectives on Water Resources & the Environment, 2013Conference paper, Published paper (Refereed)
Abstract [en]

Nutrient loads to aquatic recipients can be expected to change due to climate change. In this work, we focus on nitrogen loads to the lake Råcksta Träsk in Stockholm, Sweden as an example of an urban ecosystem. A substance flow model is developed to describe the sources and pathways of nitrogen at present. A feed-back table approach is applied to indicate potential climate change effects on nitrogen source strengths and processes in pathways, using existing regional climate change scenarios. The tentative results indicate that biological, hydrological, meteorological and biogeochemical effects and change in human behavior as response to climate change may lead to altered nitrogen flows through an urban catchment.

Place, publisher, year, edition, pages
2013.
Keyword [en]
nitrogen load, urban lake, climate change, substance flow analysis, feed-back table
National Category
Environmental Sciences
Identifiers
URN: urn:nbn:se:kth:diva-186243OAI: oai:DiVA.org:kth-186243DiVA: diva2:926478
Conference
The 6th International Perspectives on Water Resources & the Environment. January 7-9, 2013 Izmir, Turkey
Note

QC 20160509

Available from: 2016-05-07 Created: 2016-05-07 Last updated: 2016-05-10Bibliographically 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
Keyword
Anthropogenic emissions, Urban development, Future, Substance flow analysis (SFA), DPSIR.
National Category
Environmental Sciences
Identifiers
urn:nbn:se:kth:diva-186245 (URN)978-91-7595-961-0 (ISBN)
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: 2016-12-15Bibliographically approved

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fulltext(408 kB)35 downloads
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Wu, JiechenMalmström, Maria E.

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