| 1. |
- Brandt, S. Anders, 1970-, et al.
(författare)
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Mapping Flood Risk Uncertainty Zones in Support of Urban Resilience Planning
- 2021
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Ingår i: Urban Planning. - Lisbon, Portugal : Cogitatio. - 2183-7635. ; 6:3, s. 258-271
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Tidskriftsartikel (refereegranskat)abstract
- River flooding and urbanization are processes of different character that take place worldwide. As the latter tends to make the consequences of the former worse, together with the uncertainties related to future climate change and flood‐risk modeling, there is a need to both use existing tools and develop new ones that help the management and planning of urban environments. In this article a prototype tool, based on estimated maximum land cover roughness variation, the slope of the ground, and the quality of the used digital elevation models, and that can produce flood ‘uncertainty zones’ of varying width around modeled flood boundaries, is presented. The concept of uncertainty, which urban planners often fail to consider in the spatial planning process, changes from something very difficult into an advantage in this way. Not only may these uncertainties be easier to understand by the urban planners, but the uncertainties may also function as a communication tool between the planners and other stakeholders. Because flood risk is something that urban planners always need to consider, these uncertainty zones can function both as buffer areas against floods, and as blue‐green designs of significant importance for a variety of ecosystem services. As the Earth is warming and the world is urbanizing at rates and scales unprecedented in history, we believe that new tools for urban resilience planning are not only urgently needed, but also will have a positive impact on urban planning.
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| 2. |
- Samuelsson, Karl, Postdoktor, et al.
(författare)
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Diverse experiences by active travel: Longitudinal study reveals a persistent discrepancy across residential contexts
- 2023
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- To inform spatial planning promoting low-carbon travel and well-being, we investigate the potential for experiential diversity by active travel across different residential contexts. We use spatiotemporal tracking and experience data from the Gävle city-region, Sweden, generated by 165 participants over the course of 15 months. Findings reveal a discrepancy between typical travel distances to locations of positive experiences (1.5–5 km) and the distances at which active travel dominates (up to 1.5 km). This discrepancy largely persists across urban, suburban, and peripheral contexts, with urban dwellers travelling further for nature experiences, whereas peripheral dwellers travel further for urbanicity experiences. These results illustrate the importance of spatial scale for promoting diverse positive experiences by active travel, regardless of residential context. Planning strategies include enhancing environmental diversity close to people’s homes and providing infrastructure that promotes switching from motorised to active travel for trips of a few kilometres.
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| 3. |
- Samuelsson, Karl, et al.
(författare)
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Impact of environment on people’s everyday experiences in Stockholm
- 2018
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Ingår i: Landscape and Urban Planning. - : Elsevier BV. - 0169-2046 .- 1872-6062. ; 171, s. 7-17
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Tidskriftsartikel (refereegranskat)abstract
- In order to construct urban environments that limit negative impacts for global sustainability while supporting human wellbeing, there is a need to better understand how features of the environment influence people’s everyday experiences. We present a novel method for studying this combining accessibility analysis and public participatory GIS (PPGIS). Seven environment features are defined and accessibility to them analysed across Stockholm municipality. We estimate the probabilities of positive and negative experiences in places based on these environment features, by using spatial regression to extrapolate from the results of an online PPGIS survey (1784 experiences of 1032 respondents). Six of the seven studied environment features have significant impact on experiential outcome, after accounting for spatial autocorrelation among the data. The results show that number of residents and proximity of nature environments and water, all common quality indicators in urban planning and research, have weak statistically significant effects on people’s experiences. However, areas dominated by large working populations or proximity to major roads have very low rates of positive experiences, while areas with high natural temperature regulating capacities have very high rates, showing that there are considerable qualitative differences within urban environments as well as nature environments. Current urban planning practices need to acknowledge these differences to limit impacts on the biosphere while promoting human wellbeing. We suggest that a good way to start addressing this is through transformation of negatively experienced urban areas through designs that integrate closeness to urbanity with possibilities to have nature experiences on a daily basis.
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| 4. |
- Samuelsson, Karl, Doktorand
(författare)
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Making space for resilient urban well-being
- 2021
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- This thesis addresses the need for urban landscapes that provide resilient contributions to inhabitants’ well-being while also limiting impacts on the Earth system. It aims to (1) advance a nuanced understanding of how urban environments relate to urban dwellers’ well-being, and (2) formulate guidelines for planning that supports urban dwellers’ well-being and align with global sustainability. The thesis consists of five empirical studies of Swedish and Danish urban landscapes in which day-to-day experiences and mental disorders were studied as different components of well-being. A variety of spatial and statistical analysis methods were leveraged, including public participation geographic information systems, remote sensing, deep learning, accessibility analysis, and spatial regression.Results convey that urban environments relate to well-being in substantial ways, but these map poorly onto the simplistic urban-nature or urban-rural dichotomies that dominate current discourse. Support of well-being instead seems to depend on spatial conditions comprised of the street network’s topological configuration, the population distribution, and the accessibility of natural settings. Since the 1990s, contrasts have intensified between stressful urban cores that are increasingly full of people and peripheral areas that are “left behind” and high-risk in terms of mental illness. Results show that urban neighbourhoods could contribute to well-being through fulfilment of three guidelines: (1) a balance of residential and daytime populations, (2) no extreme concentration of movement, and (3) accessible natural settings. Strategies in accordance with the guidelines can increase so-called topodiversity, which refers to variation in spatial conditions across an urban landscape that permits support of well-being through different pathways. Increasing topodiversity in both central and peripheral areas
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| 5. |
- Samuelsson, Karl, Doktorand, et al.
(författare)
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Residential environments across Denmark have become both denser and greener over 20 years
- 2021
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Ingår i: Environmental Research Letters. - : IOP. - 1748-9326. ; 16:1
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Tidskriftsartikel (refereegranskat)abstract
- Despite much attention in the literature, knowledge about the dynamics surrounding urban densification and urban greening is still in dire need for architects, urban planners and scientists that strive to design, develop, and regenerate sustainable and resilient urban environments. Here, we investigate countrywide patterns of changes in residential density and residential nature at high spatial resolution over a time period of >20 years (1995-2016), combining a dataset of address-level population data covering all of Denmark (>2 million address points) with satellite image-derived Normalized Difference Vegetation Index (NDVI) data. Our results show that many residential environments across Denmark have witnessed simultaneous densification and greening since the mid-1990s. In fact, the most common change within 500 metre neighbourhoods around individual address points is of joint increases in population and NDVI (28%), followed by increasing NDVI with stable population figures (21%). In contrast, only 8% of neighbourhoods around address points have seen a decline in either population or NDVI. Results were similar in low- middle- and high-density environments, suggesting that trends were driven by climate change but also to some degree enabled by urban planning policies that seek to increase rather than decrease nature in the cities.
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| 6. |
- Samuelsson, Karl, Doktorand
(författare)
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Spatial analyses of people's experiences in urban landscapes
- 2019
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Limiting cities’ negative impact for global sustainability suggests compact city development. However, extensive and accessible urban nature is important for urban dwellers’ wellbeing. Aligning efforts to make cities locally and globally sustainable means resolving this conflict.This thesis applies spatial analysis of urban dwellers’ regularly occurring experiences, as these are important wellbeing indicators, looking specifically at Stockholm, Sweden. The aim is to contribute to a nuanced understanding of urban environments’ influence on urban dwellers’ experiences. Paper I investigates how accessibility to various environment features impact the probability that people have positive or negative experiences. Paper II applies resilience principles to investigate what experiences exist together in neighbourhoods.The environment have considerable influence on people’s experiences. Some common indicators in urban planning display weak relationships with experiential outcome, while other less common ones have larger effects. Neighbourhood compositions of experiences display consistent patterns, both spatially across Stockholm and with respect to resilience principles. Many neighbourhoods harbour diverse positive experiences, while a few are dominated by negative ones.The results suggest that human-environment relations should be given more consideration in urban discourse and urban planning. A relational approach could improve urban dweller’s experiences, and positively influence their wellbeing. For urban planning to be able to handle the complexity of such an approach, I suggest that resilience principles can be heuristics for an urban development that does not compromise people’s experiences. The methodological framework developed here can be applied in other cities, as it can identify specific places for transformation, but also increase knowledge of the interplay between urban environments and people’s experiences across different contexts.
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