Evidence to build healthy cities
Restoring the environment and population health in three phases
UrbanCare city goals
- Cut rainwater runoff and water pollution
- Stop hazardous urban heat and related air pollution
- Increase urban biotopes and biodiversity
- Reduce urban-associated diseases (allergic, inflammatory, auto-immune)
- Stop heat-related diseases and mortality
- Improve active travel levels and quality access to public spaces
- Increase liveability (social interaction allowing virological distance)
- Reduce water treatment costs
- Save energy with passive cooling and heating
- Decrease transportation and travel costs
- Cut healthcare costs
The urban health problem
As cities around the globe grow, congestion and environmental degradation also increase, bringing along a climate and biodiversity breakdown impacting population health.
Under these circumstances, rates for allergic, inflammatory, and auto-immune diseases appear to rise which suggests that cities promote these diseases (Flies et. al., 2019).
Sealed pavements taking over green soils result in polluted rainwater runoff and hazardous urban heat spots. The consequence is an environmental degradation capable of destroying and disappearing local ecosystems, habitats, wildlife: our own living conditions.
UrbanCare Diagnostics, is a methodology to:
(i) gather evidence on how rainwater, urban heat, and biodiversity management – (urban systems) affect local habitats and population health,
(ii) deliver evidence-based designs that restore the environment and health of citizens.
BHL teams with local partners and specialists to apply UrbanCare Diagnostics. Together we evaluate the state and condition of urban sites and manage proposals under the following Healthy Green City rules:
- stop rainwater runoff and water pollution levels (stormwater management)
- eliminate hazardous urban heat spots (climate actions)
- reduce grey to green ratio in vertical and horizontal surfaces (biodiversity planning, urban biotopes) and,
- create supportive environments and pedestrian networks (design inclusive healthy spaces and places, conducive to health behaviors such as physical activity, healthy diets, and positive social interactions)
UrbanCare services: phases and tools
S1_ Health reports
Neighborhood retrofits for health must be informed about its population health needs and requirements. The report includes a review on possible health inequities from built environment designs. In focus are: vulnerable populations (such as children, the elderly, people with disabilities, patients, and the socially disadvantaged) and slow groups (such as tourists, small children’s caregivers, and street merchants). Two groups which are most at risk of traffic risks, heat exhaustion, air pollution and other outdoor environmental threats and quality access to priority locations.
As strategy to improve active travel in general, we systematically describe the elements and features for pedestrian quality experience. Pedestrian loops (link to definition) are defined between priority locations such as, kindergartens, schools, playgrounds, elderly homes, parks, and hospitals among other basic services.
S3_ Urban heat island metrics with drones
Using drone technologies, thermal imaging and high-resolution video are recorded at site; specifically along pedestrian loops to help detect hazardous heat spots. The raw data is processed and organized into temperature ranges matching material emissivity levels.
A material palette is made to determine intra-urban thermal differences, helping geo-locate risks for heat exhaustion which may lead to heat strokes and other life-threatening conditions. As well, intra-urban green variations can be determined to detect biotope disconnections which impact not only pedestrian comfort but most importantly, urban biodiversity.
Partnership main outputs:
- Open data for architects and urban designers
- Peer-reviewed publication with the Cities & Health Journal
S4_ Building information modeling
After gathering local expertise input and realizing the UrbanCare field studies, data of the urban site surveyed is retrieved and modelled in two steps. First, a BIM model of the site is made to reproduce quantities and qualities of building and street-level surfaces (the built environment).
The urban site model permits researchers and end-users to easily navigate and zoom into multiple urban scenes. The model opens the opportunity to vividly exchange ideas with residents and introduce citizen-led innovations.
S5_ UrbanCare systems model
Secondly, data from the three main urban systems (rainwater, solar energy, biotope) is uploaded to the Urban Site Model (buildings and streetscapes). The Systems Model allows to simulate how spatial concepts perform – in cutting rainwater runoff, mitigating hazardous heat spots, and regaining biotope surface area – towards improving population health-related outcomes.
An iterative process is enabled for designers to continuously adjust their spatial concepts to the context’s envrionment and feedback from residents and users.
S6_ Evidence-based design guide
Designs resulting from multiple iterations are reviewed and discussed with specialists mainly from health and design fields. With contributions by local partners, the procedures are edited into a site-specific evidence-based design guide for healthy urban planning.
S7_ Transdisciplinary co-development
The evidence-based models and guide (phase 2) lay the foundation for our problem-solving workshops. The site studied by BHL and local researchers is thoroughly discussed in four sessions with a highly qualified panel of specialists in fields of climate, ecology, health and design.
Enjoy the video!
Transdisciplinary workshop sessions
Session 1_ runoff and floods
Session 2_ urban heat
Session 3_ biodiversity loss
Session 4_ healthy neighborhood
- techno-economic feasibility
- socio-cultural impact
- legal and policy