Reorienting SUDS : an integrated approach to urban regeneration and flood mitigation in Glasgow
Paudel, Saloni (2022)
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2022111422665
https://urn.fi/URN:NBN:fi:amk-2022111422665
Tiivistelmä
Existing post-industrial cities frequently face a conundrum between urban renewal, addressing the demands for economic resilience and community well-being on the one hand, and coping with the unpredictability intrinsic with climate change-related risks on the other. Glasgow has many derelict lands that need redevelopment and a long history of urban flooding. When water flows into a city faster than it can be emitted or absorbed by the soil, it overwhelms the drainage capacity. This thesis investigates the implications of an integrated approach to strategic urban planning based on the amalgamation of Sustainable drainage systems for urban regeneration and flooding for meeting polycentric needs of today.
First, through spatial analysis, sites most suitable for using SUDS for regeneration and flood mitigation are found, which was 3.17 % of the total area of Glasgow. Dalmarnock, which was one of the most suitable sites, is identified as a case study area and a microanalysis is performed. The rainfall of 30 years (1990-2020) is analysed with climate change allowance of 40%. Next, hydrological analysis in ArcGIS Pro to find the areas of highest flow accumulation. It was found that the rainfall will increase by at least 31% in the next 30 years, and Dalmarnock lacks the drainage capacity to incorporate that amount of change. So, a cost-benefit analysis was used the benefit transfer to compare incorporating SUDS and traditional grey drainage system. The kind of SUDS component to use for CBA was chosen based on SWOT analysis and consideration of the geo-morphology of the area. The result inclined with retrofitting SUDS as decentralized SUDS provided not only drainage benefits, but benefits related to community, economy, and environment in general. Moreover, expert interviews were conducted to understand the contemporary situation of SUDS and their opinion about its integration with urban regeneration in Glasgow. The result that there are technological means to achieve it. Glasgow is already at the forefront of implementing SUDS, compared to other Scottish cities. However, in contrast, it is not as extensively being implemented as it should be, engendering a contradiction in planning and practice, the main reasons being Lack of funding, Lack of public participation, Lack of ownership & commitment, to name a few, especially in low-income areas. As a silver lining, they seemed quite excited about the prospects of integration of SUDS with regeneration and suggested if we can show its combined economic, social, and environment benefits, the chances of funding will increase exponentially. Furthermore, this thesis suggests that the urban sectoral policies incorporate this idea of using SUDS for urban regeneration to change the tunnel vision of drainage into an unorthodox, more holistic planning to increase city resilience, especially in the income-deprived areas in the face of future uncertainties.
First, through spatial analysis, sites most suitable for using SUDS for regeneration and flood mitigation are found, which was 3.17 % of the total area of Glasgow. Dalmarnock, which was one of the most suitable sites, is identified as a case study area and a microanalysis is performed. The rainfall of 30 years (1990-2020) is analysed with climate change allowance of 40%. Next, hydrological analysis in ArcGIS Pro to find the areas of highest flow accumulation. It was found that the rainfall will increase by at least 31% in the next 30 years, and Dalmarnock lacks the drainage capacity to incorporate that amount of change. So, a cost-benefit analysis was used the benefit transfer to compare incorporating SUDS and traditional grey drainage system. The kind of SUDS component to use for CBA was chosen based on SWOT analysis and consideration of the geo-morphology of the area. The result inclined with retrofitting SUDS as decentralized SUDS provided not only drainage benefits, but benefits related to community, economy, and environment in general. Moreover, expert interviews were conducted to understand the contemporary situation of SUDS and their opinion about its integration with urban regeneration in Glasgow. The result that there are technological means to achieve it. Glasgow is already at the forefront of implementing SUDS, compared to other Scottish cities. However, in contrast, it is not as extensively being implemented as it should be, engendering a contradiction in planning and practice, the main reasons being Lack of funding, Lack of public participation, Lack of ownership & commitment, to name a few, especially in low-income areas. As a silver lining, they seemed quite excited about the prospects of integration of SUDS with regeneration and suggested if we can show its combined economic, social, and environment benefits, the chances of funding will increase exponentially. Furthermore, this thesis suggests that the urban sectoral policies incorporate this idea of using SUDS for urban regeneration to change the tunnel vision of drainage into an unorthodox, more holistic planning to increase city resilience, especially in the income-deprived areas in the face of future uncertainties.