Dienst van SURF
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Due to climate change the frequency of extreme precipitation increases. To reduce the risk of damage by flooding, municipalities will need to retrofit urban areas in a climate-resilient way. To justify this investment, they need insight in possibilities and costs of climate-resilient urban street designs. This chapter focused on how to retrofit characteristic (Dutch) typologies of urban residential areas. For ten cases alternative street layouts were designed with a determination of the life cycle costs and benefits. All designs are resilient to extreme rain events. The results show that most flat urban typologies can easily be retrofitted in a climate-resilient way without additional costs compared to the standard way of retrofitting. Climate proofing sloping areas are highly dependent on the situation downstream. When there is no space downstream to divert the water into waterways or parks, costs to provide storage easily rise above traditional levels for retrofitting. In addition to reducing flood risk, for each case one variant includes resilience to extreme heat events making use of green. The life cycle costs and benefits of the green variants showed that especially green designs in high-density urban areas result in a better value for money.
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Efforts to create age-friendly cities progressively intersect with goals for environmental sustainability. The older people’s beliefs, behaviours and financial aspects regarding environmental sustainability in their lives are an understudied topic and not well understood. Therefore, a representative survey was conducted using the psychometrically sound and comprehensive SustainABLE-16 Questionnaire. A total of 388 respondents, who were community-dwelling older people in The Hague, filled out the survey completely. Overall, the mean scores on the SustainABLE-16 for finance- and environment-driven pro-environmental behaviours, beliefs and the financial position among older people were positive for all districts of The Hague. Using the outcomes of the survey, a total of six unique typologies were identified through a two-step process combining hierarchical and k-means cluster analyses. These six typologies are 1 the staunch non-believers, 2 the finance-driven non-believers, 3 the everyday individuals, 4 belief-driven people with limited financial resources, 5 believing non-responders, 6 the affluent and engaging people. These six typologies each require different approaches from policymakers. Sustainabilityrelated policies should ideally focus on groups with high scores for pro-environmental behaviours but who have shortcomings in knowledge how to improve one’s everyday lifestyle and groups who lack the necessary financial means to live a more sustainable life.
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Post-war urban neighbourhoods in industrialised countries have been shown to negatively affect the lifestyles of their residents due to their design. This study aims at developing an empirical procedure to select locations to be redesigned and the determinants of health at stake in these locations, with involvement of residents’ perspectives as core issue. We addressed a post-war neighbourhood in the city of Groningen, the Netherlands. We collected data from three perspectives: spatial analyses by urban designers, interviews with experts in local health and social care (n = 11) and online questionnaires filled in by residents (n = 99). These data provided input for the selection of locations to be redesigned by a multidisciplinary team (n = 16). The procedure yielded the following types of locations (and determinants): An area adjacent to a central shopping mall (social interaction, traffic safety, physical activity), a park (experiencing green, physical activity, social safety, social interaction) and a block of low-rise row houses around a public square (social safety, social interaction, traffic safety). We developed an empirical procedure for the selection of locations and determinants to be addressed, with addressing residents’ perspectives. This procedure is potentially applicable to similar neighbourhoods internationally.
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