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Suleiman, L., Olofsson, B., Sauri, D. & Palau-Rof, L. (2020). A breakthrough in urban rain -harvesting schemes through planning for urban greening: Case studies from Stockholm and Barcelona. Urban Forestry & Urban Greening, 51, Article ID 126678.
Åpne denne publikasjonen i ny fane eller vindu >>A breakthrough in urban rain -harvesting schemes through planning for urban greening: Case studies from Stockholm and Barcelona
2020 (engelsk)Inngår i: Urban Forestry & Urban Greening, ISSN 1618-8667, E-ISSN 1610-8167, Vol. 51, artikkel-id 126678Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A plethora of socioenvironmental issues, and growing concerns over the effects of climate change, are forcing cities to rethink conventional urban water management practices. However, change towards more sustainable practices has been remarkably slow. This paper examines two cases of greening projects aimed at urban rehabilitation in Stockholm and Barcelona, which have turned into examples of innovative approaches to urban rain management. Both cities share high densities and flooding problems in certain neighborhoods. Specifically, the paper attempts to answer three questions: 1) what were the driving forces and key factors that facilitated the breakthrough of urban rainwater-harvesting (URH) schemes based on the two cases?; 2) who were the actors involved and what were their roles in moving towards URH schemes?; and 3) how can URH schemes become part of multifunctional, sustainable urban systems? To answer these questions, the paper uses concepts of adaptive context and capacity, and of actor agency, drawn from the transitions literature, and opportunistic and guided flexibility planning drawn from the planning literature. Empirical material for both case studies was obtained from policy documents and semi-structured interviews with key actors. The main results show first political support for flexibility in public planning, the adaptive context and the capacity of the actors, especially in taking advantage of windows of opportunity for the materialisation of new ideas. Second, the design and implementation of these systems widened the number and scope of actors in urban water management, incorporating new professionals such as architects and involving more city agencies and organizations. Third, small scale URH systems contributed not only to control urban drainage but performed other functions such as the much-needed greening of dense areas in both cities.

sted, utgiver, år, opplag, sider
Elsevier, 2020
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-277985 (URN)10.1016/j.ufug.2020.126678 (DOI)000539724700012 ()2-s2.0-85084842175 (Scopus ID)
Merknad

QC 20200703

Tilgjengelig fra: 2020-07-03 Laget: 2020-07-03 Sist oppdatert: 2022-06-26bibliografisk kontrollert
Suleiman, L., Olofsson, B., Saurí, D., Palau-Rof, L., García Soler, N., Papasozomenou, O. & Moss, T. (2020). Diverse pathways—common phenomena: comparing transitions of urban rainwater harvesting systems in Stockholm, Berlin and Barcelona. Journal of Environmental Planning and Management, 63(2), 369-388
Åpne denne publikasjonen i ny fane eller vindu >>Diverse pathways—common phenomena: comparing transitions of urban rainwater harvesting systems in Stockholm, Berlin and Barcelona
Vise andre…
2020 (engelsk)Inngår i: Journal of Environmental Planning and Management, ISSN 0964-0568, E-ISSN 1360-0559, Vol. 63, nr 2, s. 369-388Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Urban rainwater management is the terrain of varied initiatives that challenge existing drainage systems. The initiatives that this article refers to as Urban Rainwater Harvesting (URH), promise a more sustainable urban water approach; however, they remain isolated “niche” projects. The article aims to investigate challenges and opportunities for mainstreaming alternative URHs as sociotechnical systems (STS). It identifies six analytical categories: context, actors, instruments, processes/dynamics, outputs and impacts as a framework for the analyses of URH projects in Stockholm, Berlin and Barcelona. Despite the diversity of socio-spatial contexts, driving forces, purposes, instruments used, technical designs and scale of URH projects, relevant factors for a breakthrough of these systems are discussed. Even though URHs have not yet become a common component of rainwater management in any of the cities, context-specific combinations of these factors are found to be essential if these systems are to become complementary options for the sustainable management of rainwater in cities.

sted, utgiver, år, opplag, sider
Routledge, 2020
Emneord
Barcelona, Berlin, sociotechnical, Stockholm, transition, urban rainwater harvesting (URH)
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-263279 (URN)10.1080/09640568.2019.1589432 (DOI)000498772000013 ()2-s2.0-85068834245 (Scopus ID)
Merknad

QC 20191105

Tilgjengelig fra: 2019-11-05 Laget: 2019-11-05 Sist oppdatert: 2022-06-26bibliografisk kontrollert
Björk, F., Sederholm, B., Tragardh, J. & Olofsson, B. (2020). Electroosmosis - a method applied for handling of moisture in foundations. In: Kurnitski, J Kalamees, T (Ed.), 12th Nordic symposium on building physics (NSB 2020): . Paper presented at 12th Nordic Symposium on Building Physics (NSB), SEP 06-09, 2020, Tallinn, ESTONIA. EDP Sciences, Article ID 17010.
Åpne denne publikasjonen i ny fane eller vindu >>Electroosmosis - a method applied for handling of moisture in foundations
2020 (engelsk)Inngår i: 12th Nordic symposium on building physics (NSB 2020) / [ed] Kurnitski, J Kalamees, T, EDP Sciences , 2020, artikkel-id 17010Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

Electroosmosis is an electrokinetic phenomena which is applied in some technical fields. It is also applied large scale for transport of moisture out of basements. We see the method of electroosmosis as an opportunity for solving moisture problems in basements. However, there is a need to develop both the technology for the method and the understanding about what to expect out of it. Better methods are needed to predict whether the method will work in a particular case.

sted, utgiver, år, opplag, sider
EDP Sciences, 2020
Serie
E3S Web of Conferences, ISSN 2267-1242 ; 172
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-288599 (URN)10.1051/e3sconf/202017217010 (DOI)000594033400171 ()2-s2.0-85088438089 (Scopus ID)
Konferanse
12th Nordic Symposium on Building Physics (NSB), SEP 06-09, 2020, Tallinn, ESTONIA
Merknad

QC 20210113

Tilgjengelig fra: 2021-01-13 Laget: 2021-01-13 Sist oppdatert: 2022-06-25bibliografisk kontrollert
Earon, R., Riml, J., Wu, L. & Olofsson, B. (2020). Insight into the influence of local streambed heterogeneity on hyporheic-zone flow characteristics. Hydrogeology Journal, 28(8), 2697-2712
Åpne denne publikasjonen i ny fane eller vindu >>Insight into the influence of local streambed heterogeneity on hyporheic-zone flow characteristics
2020 (engelsk)Inngår i: Hydrogeology Journal, ISSN 1431-2174, E-ISSN 1435-0157, Vol. 28, nr 8, s. 2697-2712Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Interaction between surface water and groundwater plays a fundamental role in influencing aquatic chemistry, where hyporheic exchange processes, distribution of flow paths and residence times within the hyporheic zone will influence the transport of mass and energy in the surface-water/groundwater system. Geomorphological conditions greatly influence hyporheic exchange, and heterogeneities such as rocks and clay lenses will be a key factor for delineating the hyporheic zone. Electrical resistivity tomography (ERT) and ground-penetrating radar (GPR) were used to investigate the streambed along a 6.3-m-long reach in order to characterise geological layering and distinct features which may influence parameters such as hydraulic conductivity. Time-lapse ERT measurements taken during a tracer injection demonstrated that geological features at the meter-scale played a determining role for the hyporheic flow field. The penetration depth of the tracer into the streambed sediment displayed a variable spatial pattern in areas where the presence of highly resistive anomalies was detected. In areas with more homogeneous sediments, the penetration depth was much more uniformly distributed than observed in more heterogeneous sections, demonstrating that ERT can play a vital role in identifying critical hydraulic features that may influence hyporheic exchange processes. Reciprocal ERT measurements linked variability and thus uncertainty in the modelled resistivity to the spatial locations, which also demonstrated larger variability in the tracer penetration depth, likely due to local heterogeneity in the hydraulic conductivity field.

sted, utgiver, år, opplag, sider
Springer Science and Business Media Deutschland GmbH, 2020
Emneord
Electrical resistivity tomography, Geophysical methods, Groundwater/surface-water relations, Heterogeneity, Tracer tests, electrical resistivity, flow field, geophysical method, groundwater flow, groundwater-surface water interaction, hydraulic conductivity, hyporheic zone, stream bed, tomography, tracer
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-287163 (URN)10.1007/s10040-020-02244-5 (DOI)000574730400002 ()2-s2.0-85092010599 (Scopus ID)
Merknad

QC 20240110

Tilgjengelig fra: 2020-12-03 Laget: 2020-12-03 Sist oppdatert: 2024-01-10bibliografisk kontrollert
Earon, R. & Olofsson, B. (2020). Integrating storage and spatial variability into shallow groundwater balances: moving towards water security in hard rock coastal areas. Nordic Hydrology, 51(6), 1293-1311
Åpne denne publikasjonen i ny fane eller vindu >>Integrating storage and spatial variability into shallow groundwater balances: moving towards water security in hard rock coastal areas
2020 (engelsk)Inngår i: Nordic Hydrology, ISSN 0029-1277, E-ISSN 1996-9694, Vol. 51, nr 6, s. 1293-1311Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

In terrains with limited soil cover and groundwater storage, groundwater resource management is governed by the spatial nature of storage, recharge and distributed local extraction. Local soils act as important groundwater reservoirs for residents who have no other feasible water supply. A novel heuristic methodology is presented which accounts for the spatial distribution of storage and extraction, using existing topographical and geological databases in addition to well data to construct an applied conceptual groundwater model with assumed stratigraphy. The method uses a geographic information systems (GIS) environment and allows for modelling climate and land-use scenarios. Several scenarios were examined, demonstrating that average reservoir volumes meet demand but at the local levels depletion of reservoirs occurs. Groundwater abstraction in excess of 50% of the approximate freshwater storage was observed in the model, particularly near the coast. Soil-filled valleys may act as local hydraulic barriers by maintaining a higher pressure head as they are less susceptible to large-level fluctuations than the hard rock and may aid in preventing contamination from saline water provided no direct hydraulic connection is present. The method demonstrates the importance of a spatial approach in managing groundwater resources and could be used as a tool in increasing water security.

sted, utgiver, år, opplag, sider
IWA Publishing, 2020
Emneord
crystalline rock, fractured rock, geographic information systems, groundwater recharge, water budget, water security
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-288617 (URN)10.2166/nh.2020.054 (DOI)000600213800005 ()2-s2.0-85097542589 (Scopus ID)
Merknad

QC 20210112

Tilgjengelig fra: 2021-01-12 Laget: 2021-01-12 Sist oppdatert: 2022-06-25bibliografisk kontrollert
Rasul, H., Earon, R. & Olofsson, B. (2018). Detecting Seasonal Flow Pathways in Road Structures Using Tracer Tests and ERT. Water, Air and Soil Pollution, 229(11), Article ID 358.
Åpne denne publikasjonen i ny fane eller vindu >>Detecting Seasonal Flow Pathways in Road Structures Using Tracer Tests and ERT
2018 (engelsk)Inngår i: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 229, nr 11, artikkel-id 358Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Roads and traffic can be a source of water-bound pollutants, which can percolate through the unsaturated zone to groundwater. Deicing salt is widely used on roads in northern Europe during winter and is usually applied at a time when the temperature is below zero and the soil is partly frozen. Understanding the mechanism by which water-bound pollutants such as deicing salt are transferred from roads to groundwater is highly important for groundwater protection, environmental sustainability and road maintenance. Electrical resistivity tomography (ERT) can be used for tracing the infiltration of deicing salt in different seasons, including the frozen period, as a step towards identifying pollutant infiltration pathways. In this study, a tracer-ERT monitoring method and analytical process was developed and evaluated for use in investigating and demonstrating deicing salt infiltration pathways in road structures in different seasons and weather conditions. The method involves using dissolved sodium chloride as a tracer and monitoring its infiltration using a multi-electrode array system. The tracer tests were performed at the same location in different seasons over a 1-year period. The results indicated high seasonal variation in percolation pattern and flow velocity, with large decreases in December (winter), most likely due to preferential flow paths within the road shoulder. These findings can be applied to other water-soluble pollutants that move from the road surface to groundwater.

sted, utgiver, år, opplag, sider
Springer, 2018
Emneord
ERT, Tracer test, Flow pathways, Road, Hydrology
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-239085 (URN)10.1007/s11270-018-4008-6 (DOI)000448508700017 ()30416221 (PubMedID)2-s2.0-85055443425 (Scopus ID)
Merknad

QC 20181121

Tilgjengelig fra: 2018-11-21 Laget: 2018-11-21 Sist oppdatert: 2022-06-26bibliografisk kontrollert
Björk, F., Olofsson, B., Sederholm, B. & Trägårdh, J. (2018). Dränering av fukt i betong genom elektrokemisk metodik (elektroosmos) .
Åpne denne publikasjonen i ny fane eller vindu >>Dränering av fukt i betong genom elektrokemisk metodik (elektroosmos)
2018 (svensk)Rapport (Annet vitenskapelig)
Abstract [sv]

Syftet med detta projekt är att studera funktionen av elektroosmos som åtgärd mot fukt-problem i byggnader i Sverige samt att utifrån detta ge rekommendationer kring om och i så fall när det är lämpligt/olämpligt att använda metodiken under de varierande fuktighets-förhållanden som vanligtvis råder i Sverige.

I projektet har vi gjort en litteraturstudie, en modellering av fysikaliska processer, studie-besök i byggnader med installationer för elektroosmos och mätningar av fukt i en källarvägg där en installation för elektroosmos blivit gjord.

Vi ser metoden elektroosmos som en möjlighet för att hantera fuktproblem i grunder. Det behövs dock en del av utveckling både kring tekniken för metoden och kring vad som ska kunna förväntas av den.

Det behövs bättre möjligheter att kunna förutsäga att metoden kommer att fungera i ett visst fall. Att inte kunna förutsäga detta bör vara ett bekymmer för dem som marknadsför metoden.

Elektroosmos kräver höga fuktnivåer för att fungera. Torkning ned till under kritiska fuktnivåer kräver komplettering med andra torkmetoder. Det krävs en tydlighet kring hur detta ska lösas.

Det behövs en bättre förståelse kring hur elektroderna ska placeras för bästa funktion.

Fuktvandring i jorden kan ha stor betydelse för processen i praktiken. Det är idé att undersöka om detta kan användas för att utveckla metoden.

Det behövs klara regler kring hur elinstallationen ska utformas på ett säkert sätt.

Eftersom jontransporten i betongen är av ganska liten omfattning så tror vi inte att elektroosmos kommer att påverka, eller skada, betongens egenskaper på lång sikt.

Publisher
s. 19
Serie
SBUF ; ID: 13362
Emneord
Grunder fukt elektroosmos
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-247999 (URN)
Forskningsfinansiär
SBUF - Sveriges Byggindustriers Utvecklingsfond, 13362
Merknad

QC 20190402

Tilgjengelig fra: 2019-04-01 Laget: 2019-04-01 Sist oppdatert: 2024-03-18bibliografisk kontrollert
Earon, R. & Olofsson, B. (2018). Hydraulic heterogeneity and its impact on kinematic porosity in Swedish coastal terrains. Engineering Geology, 245
Åpne denne publikasjonen i ny fane eller vindu >>Hydraulic heterogeneity and its impact on kinematic porosity in Swedish coastal terrains
2018 (engelsk)Inngår i: Engineering Geology, ISSN 0013-7952, E-ISSN 1872-6917, Vol. 245Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Hydrogeology in crystalline rock aquifers is often problematic due to the heterogeneity and anisotropy in thefracture network. Kinematic porosity of the host rock is exceedingly important for municipal decision makers inassessing sustainably extractable water supply volumes and assessing contaminant transport behavior within thematrix. This study explores heteroscedasticity in the hydrogeological characteristics of the fracture network andestimation of kinematic porosity from superficial fracture measurements. Estimates were based on the geometricalproperties of the fractures including: fracture frequency, aperture and orientation. The estimates wereadjusted for aperture changes with depth, connectivity of the fracture network, fracture continuity and measurementorientation bias. The results were compared with well archive data and correlations were found to besignificant with more than 95% confidence. Erratic behaviour of well data relative to fracture measurementsindicates that well orientation with respect to the fracture network gives incomplete hydrogeological data.Spatial heterogeneity of the bedrock was examined using spatial statistics and geographic information systems.The results from the spatial statistical analyses of well data showed that the heterogeneity within the bedrock issufficiently high that spatial correlations cease to exist in nearly all investigated rock types at distances greaterthan 500 m, and in some rocks, particularly sedimentary gneisses, no spatial correlations were observed.Arbitrarily grouped samples with similar geology and topography showed evidence of non-stationary variance.Results indicate that regional generalizations based on sparse point measurements are highly error prone andpotential exists in complementary field-based estimates.

sted, utgiver, år, opplag, sider
Elsevier, 2018
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-246195 (URN)10.1016/j.enggeo.2018.08.008 (DOI)000448494600006 ()2-s2.0-85051820071 (Scopus ID)
Forskningsfinansiär
The Geological Survey of Sweden (SGU), 60-1640/2007Swedish Research Council Formas, 2017-01504
Merknad

QC 20190318

Tilgjengelig fra: 2019-03-15 Laget: 2019-03-15 Sist oppdatert: 2024-03-15bibliografisk kontrollert
Rasul, H., Zou, L. & Olofsson, B. (2018). Monitoring of moisture and salinity content in an operational road structure by electrical resistivity tomography.. Near Surface Geophysics, 16(4), 423-444
Åpne denne publikasjonen i ny fane eller vindu >>Monitoring of moisture and salinity content in an operational road structure by electrical resistivity tomography.
2018 (engelsk)Inngår i: Near Surface Geophysics, ISSN 1569-4445, E-ISSN 1873-0604, Vol. 16, nr 4, s. 423-444Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Moisture dynamics in road systems significantly affect road structure design and maintenance. This study analysed moisture dynamics in a cross-section of motorway (the E18) in Sweden during a one-year period through in situ monitoring using electrical resistivity tomography (ERT). The monitoring methodology was assessed since resistivity can provide a good proxy for monitoring moisture in the road structure. Monthly electrical resistivity was calculated by inverting resistivity data along a pre-installed electrical resistivity line beneath the surface asphalt layer of the road at the test site. The electrical resistivity data were then statistically analysed and correlated with local climate data, i.e. precipitation and temperature, and with ground parameters such as moisture content. The results showed high variation in resistivity in the road surface layer and road shoulders depending on weather conditions, water flow and other surface activities. In general, negative correlations between electrical resistivity and precipitation were observed. The results also indicated possible retardation of de-icing salt after accumulating in the top layer during winter. These findings advance understanding of the moisture dynamics in roads and can help improve pavement design in response to future climate change.

sted, utgiver, år, opplag, sider
Wiley, 2018
Emneord
2D Electrical Resistivity Tomography; Road structures; Moisture content; in-situ monitoring; De-icing salt
HSV kategori
Forskningsprogram
Mark- och vattenteknik
Identifikatorer
urn:nbn:se:kth:diva-226859 (URN)10.1002/nsg.12002 (DOI)000448978300004 ()2-s2.0-85054475946 (Scopus ID)
Merknad

 Accepted for publication on 25 January 2018. QC 20180503

Tilgjengelig fra: 2018-04-26 Laget: 2018-04-26 Sist oppdatert: 2023-02-21bibliografisk kontrollert
Karlsson, C., Miliutenko, S., Björklund, A., Mörtberg, U., Olofsson, B. & Toller, S. (2017). Life cycle assessment in road infrastructure planning using spatial geological data. The International Journal of Life Cycle Assessment, 22(8), 1302-1317
Åpne denne publikasjonen i ny fane eller vindu >>Life cycle assessment in road infrastructure planning using spatial geological data
Vise andre…
2017 (engelsk)Inngår i: The International Journal of Life Cycle Assessment, ISSN 0948-3349, E-ISSN 1614-7502, Vol. 22, nr 8, s. 1302-1317Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Purpose: The purpose of the study was to outline and demonstrate a new geographic information system (GIS)-based approach for utilising spatial geological data in three dimensions (i.e. length, width and depth) to improve estimates on earthworks during early stages of road infrastructure planning. Methods: This was undertaken by using three main methodological steps: mass balance calculation, life cycle inventory analysis and spatial mapping of greenhouse gas (GHG) emissions and energy use. The mass balance calculation was undertaken in a GIS environment using two assumptions of geological stratigraphy for two proposed alternative road corridors in Sweden. The estimated volumes of excavated soil, blasted rock and filling material were later multiplied with the GHG emission and energy use factors for these processes, to create spatial data and maps in order to show potential impacts of the studied road corridors. The proposed GIS-based approach was evaluated by comparing with actual values received after one alternative was constructed. Results and discussion: The results showed that the estimate of filling material was the most accurate (about 9 % deviation from actual values), while the estimate for excavated soil and blasted rock resulted in about 38 and 80 % deviation, respectively, from the actual values. It was also found that the total volume of excavated and ripped soils did not change when accounting for stratigraphy. Conclusions: The conclusion of this study was that more information regarding embankment height and actual soil thickness would further improve the model, but the proposed GIS-based approach shows promising results for usage in LCA at an early stage of road infrastructure planning. Thus, by providing better data quality, GIS in combination with LCA can enable planning for a more sustainable transport infrastructure.

sted, utgiver, år, opplag, sider
Springer, 2017
Emneord
Energy, Geology, GHG emissions, GIS, LCA, Mass balance, Road, Stratigraphy
HSV kategori
Forskningsprogram
Mark- och vattenteknik
Identifikatorer
urn:nbn:se:kth:diva-197305 (URN)10.1007/s11367-016-1241-3 (DOI)000405292800012 ()2-s2.0-85010809681 (Scopus ID)
Forskningsfinansiär
Swedish Research Council FormasStandUp
Merknad

QC 20170118

Tilgjengelig fra: 2016-12-01 Laget: 2016-12-01 Sist oppdatert: 2024-03-18bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0002-9769-738x