524 research outputs found
Closure to “Environmental Risk Assessment of Sediments Deposited in Stormwater Treatment Facilities: Trace Metal Fractionation and Its Implication for Sediment Management” by Kristin Karlsson, Godecke-Tobias Blecken, Björn Öhlander, and Maria Viklander
No full textSustainable living conditions in subarctic regions of Sweden
No full textNorth of the Arctic Circle in Sweden lies Malmfälten, a region that has been dominated by mining activities for over one hundred years. In this region two small towns are located,Kiruna and Gällivare/Malmberget, where current and future underground mining activities are the cause of land instability that requires relocation of substantial parts of both towns. The circumstances in Malmfälten offer significant research opportunities within the fields of urban and infrastructure planning, construction, operation and maintenance and demolition to address environmental problems that result from urban settlements. Environmental issues that are relevant in this context are e.g. the location of valuable natural areas, and emissions from buildings and infrastructure during construction and use. To develop urban settlements sustainability, there is a need for more sustainable technologies in relation to human and social aspects. Besides the special circumstances in Malmfälten concerning the mining activities, land instability and relocation of urban settlements and citizens, this region is also of interest because of the fact that it is located in the Subarctic. In subarctic regions there are special demands on planning, buildings and infrastructure, concerning design, operation and maintenance due to factors such as cold temperatures, snowfall and permafrost. However, technology alone will not be sufficient. New technical solutions and innovations must be integrated both with planning and implementation processes and with a user perspective in order to put new technologies into practice. Malmfälten has the potential to become a uniquely innovative site for sustainable urban technologies, applications and processes in subarctic regions, as re-envisioning and redevelopment of a complete existing urban system is required there. Furthermore, the economic, social and environmental drivers of change in the case of Malmfälten present many possible future scenarios that could affect the relocation of the towns. This uncertainty, too, provides significant research opportunities in the development of not only more sustainable decision-making processes but also new robust, flexible and mobile urban infrastructure technologies that can be adaptive in a range of future scenarios and applicable well beyond the particularities of the context of Malmfälten.Godkänd; 2011; 20110504 (marvik)</p
Sustainable living conditions in subarctic regions of Sweden
No full textNorth of the Arctic Circle in Sweden lies Malmfälten, a region that has been dominated by mining activities for over one hundred years. In this region two small towns are located,Kiruna and Gällivare/Malmberget, where current and future underground mining activities are the cause of land instability that requires relocation of substantial parts of both towns. The circumstances in Malmfälten offer significant research opportunities within the fields of urban and infrastructure planning, construction, operation and maintenance and demolition to address environmental problems that result from urban settlements. Environmental issues that are relevant in this context are e.g. the location of valuable natural areas, and emissions from buildings and infrastructure during construction and use. To develop urban settlements sustainability, there is a need for more sustainable technologies in relation to human and social aspects. Besides the special circumstances in Malmfälten concerning the mining activities, land instability and relocation of urban settlements and citizens, this region is also of interest because of the fact that it is located in the Subarctic. In subarctic regions there are special demands on planning, buildings and infrastructure, concerning design, operation and maintenance due to factors such as cold temperatures, snowfall and permafrost. However, technology alone will not be sufficient. New technical solutions and innovations must be integrated both with planning and implementation processes and with a user perspective in order to put new technologies into practice. Malmfälten has the potential to become a uniquely innovative site for sustainable urban technologies, applications and processes in subarctic regions, as re-envisioning and redevelopment of a complete existing urban system is required there. Furthermore, the economic, social and environmental drivers of change in the case of Malmfälten present many possible future scenarios that could affect the relocation of the towns. This uncertainty, too, provides significant research opportunities in the development of not only more sustainable decision-making processes but also new robust, flexible and mobile urban infrastructure technologies that can be adaptive in a range of future scenarios and applicable well beyond the particularities of the context of Malmfälten.Godkänd; 2011; 20110504 (marvik)</p
Data for: Urban drainage models for green areas: structural differences and their effects on simulated runoff
No full textSeasonal and event-based mass balances for "Urban drainage models for green areas: structural differences and their effects on simulated runoff" by Ico Broekhuizen, Tone Muthanna, Günther Leonhardt, Maria Viklander. Includes mass balances (seasonal and event-based) and Jupyter Notebooks for handling this data
Dissolved and particle-bound substances in urban snow
No full textIn order to create a picture of the pollutant pathways for snow in urban areas, snow samples were collected in the city of Luleå, northern Sweden. Sampling sites were chosen in the city centre and in a housing area - three different sites in each area. Snow samples were collected during the whole winter of 1995. The results showed that the amounts of dissolved substances as percentages of the total amounts varied according to time, site and the type of substance. For the sites along the roadsides in the city centre, the amounts that were in solution were less than 1% of the lead, 2.5% of the phosphorus, 11% of the copper, and 18% of the zinc. For the site with no-traffic, the dissolved fractions were considerably higher.</jats:p
Data for: Urban drainage models for green areas: structural differences and their effects on simulated runoff
No full textSeasonal and event-based mass balances for "Urban drainage models for green areas: structural differences and their effects on simulated runoff" by Ico Broekhuizen, Tone Muthanna, Günther Leonhardt, Maria Viklander. Includes mass balances (seasonal and event-based) and Jupyter Notebooks for handling this data.THIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW A LIST OF FILES AND ACCESS THE FILES IN THIS DATASET CLICK ON THE DOI-LINK ABOV
Identifying sources of infiltration and inflow in sanitary sewers in a northern community: comparative assessment of selected methods
No full textInfiltration and inflow (I/I) into sanitary sewers causes numerous negative effects on the whole wastewater management system and ultimately, on the receiving waters. Consequently, a number of methods have been developed to analyse the performance of sewer systems with respect to I/I, including: distributed temperature sensing (DTS), closed-circuit television (CCTV) inspections, flow and conductivity measurements, automatic or grab sampling of ammonium, smoke testing, and visual inspection of manholes. Such methods were compared in an application to sanitary sewers in a small community and assessed with respect to their accuracy and ability to identify locations of sources of I/I, as well as temporal and spatial resolutions of the obtained results. Furthermore, different approaches to ammonium sampling during I/I monitoring campaigns were discussed. It was concluded that among the methods tested in this study, DTS had the highest temporal and spatial resolution, while ammonium grab sampling showed promise for initial screening of large catchments.Sanitary Engineerin
Long-Term Performance, Operation and Maintenance Needs of Stormwater Control Measures
No full textFör återvalidering; 2016; 20160502 (ahmed); Nedanstående person kommer att disputera för avläggande av teknologie doktorsexamen. Namn: Ahmed Mohammed Qassim Al-Rubaei Ämne: VA-teknik/Urban Water Engineering Avhandling: Long-Term Performance, Operation and Maintenance Needs of Stormwater Control Measures Opponent: Associate Professor Elizabeth Fassman-Beck, Departement of Civil, Environmental and Ocean Engineering, Stevens Institute of Technology, Hoboken, New Jersey, USA. Ordförande: Professor Maria Viklander, Avdelningen för Arkitektur och vatten, Institutionen för samhällsbyggnad och naturresurser, Luleå tekniska universitet, Luleå. Tid: Torsdag 9 juni 2016, kl 10.00 Plats: A109, Luleå tekniska universite
Polycyclic aromatic hydrocarbons (PAH) in water and sediment from gully pots
No full textA gully pot is often cleaned with the help of an eductor truck, which uses hydrodynamic pressure and a vacuum to loosen and remove the solids and standing liquid from a gully pot. This paper considers the polycyclic aromatic hydrocarbons (PAH) content in the gully pot mixture (water and sediment) after it has been discharged from the eductor truck. The results show that most PAH was attached to particles, and the dissolved phase represented approximately 22% of the total water concentration. No significant difference was found for the water phase between a housing area and a road, whereas a significant difference was found for NAP, ACE, FL, ANT, FLR, PYR, BaF, and BPY in the sediment at a 95% confidence level. Source identification showed that the PAH in the gully pot mixture came from mixed sources. Both the water and sediment phase exceed all or some of the compared guidelines. The result from this paper shows that not only the sediment needs to be discussed, but also the water phase created during the maintenance of different BMPs.Validerad; 2008; 20080123 (krika
Substances in Urban Snow : A comparison of the contamination of snow in different parts of the city of Luleå, Sweden
No full textThe aim of the study was to investigate how the quality of snow varies within a city. The study area is situated in the Luleå municipality, in northern Sweden (lat. 65°35'N and long. 22°10'E). For this study, the city was divided into three different types of areas: housing areas, city centre and outskirts. In one area of each type, sampling sites were selected. Snow samples were taken at nine occasions, once every fourteenth day in the city centre and in the housing area. Analyses were carried out for pH, conductivity, suspended solids and both the total and dissolved concentration of phosphorus and selected metals. It was concluded that traffic or activities related to traffic were a major source of heavy metals and phosphorus in urban snow, both in the city centre and in the housing area. Also, the type of area and the design of the street were important for the quality of snow. A clear relation was found between the pH and the quantity of suspended solids in the snow. Higher pH values were found in snow samples from sites with higher traffic loads, and lower pH values at sites, which were the no-traffic sites, with small quantities of particles. The particulate and dissolved substances in the snow behaved in different ways.</p
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