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Co-creating responsive urban spaces

Responsive public spaces: Five mechanisms for the design of public space in the era of networked urbanism

This chapter explores the use of “responsive” or “interactive” urban media technologies as a tool or “building block” in the (re)design of urban public spaces. This is especially relevant as in the last two decades, urban development and digital technologies have brought out new types of urban typologies and practices often referred to as “networked urbanism.” These typologies and practices bring out specific challenges with regard to their functioning as public space. We argue that responsive technologies could reinforce qualities of public space in this condition of “networked urbanism”; however, their implementation demands new strategies and above all new forms of cooperation between disciplines such as architecture, urban design, and urban interaction design. To aid such an approach, this chapter introduces a heuristic of five mechanisms of responsive media. These are meant to function as a shared vocabulary aiding designers of various backgrounds to collaborate in an interdisciplinary design process for public spaces in a broader development of networked urbanism.

Assessment of thermally comfortable urban spaces in Amsterdam during hot summer days

Since it is insufficiently clear to urban planners in the Netherlands to what extent design measures can reduce heat stress and which urban spaces are most comfortable, this study evaluates the impact of shading, urban water, and urban green on the thermal comfort of urban spaces during hot summer afternoons. The methods used include field surveys, meteorological measurements, and assessment of the PET (physiological equivalent temperature). In total, 21 locations in Amsterdam (shaded and sunny locations in parks, streets, squares, and near water bodies) were investigated. Measurements show a reduction in PET of 12 to 22 °C in spaces shaded by trees and buildings compared to sunlit areas, while water bodies and grass reduce the PET up to 4 °C maximum compared to impervious areas. Differences in air temperature between the locations are generally small and it is concluded that shading, water and grass reduce the air temperature by roughly 1 °C. The surveys (n = 1928) indicate that especially shaded areas are perceived cooler and more comfortable than sunlit locations, whereas urban spaces near water or green spaces (grass) were not perceived as cooler or thermally more comfortable. The results of this study highlight the importance of shading in urban design to reduce heat stress. The paper also discusses the differences between meteorological observations and field surveys for planning and designing cool and comfortable urban spaces. Meteorological measurements provide measurable quantities which are especially useful for setting or meeting target values or guidelines in reducing urban heat in practice.

Adaptive public spaces

The present social and environmental challenges, the impact of climate change andthe pandemic, revealed the urgency and the opportunity to rethink urban designthrough its renewed spaces and temporalities. The pandemic offered a ‘natural exper-iment’ to explore and develop new perspectives, making public spaces more resilient.Contributing towards a rethink of these spaces, the present paper explores adaptivearchitecture with responsive technologies and their capability of shaping public spacesto constitute a conversation piece with the surrounding environment. This approachcombines and reflects different disciplinary fields: architecture, civic interaction and ur-ban design. The exploration works around a speculative design case – produced aspart of broader research at the Amsterdam University of Applied Science in collabora-tion with the Master in Digital Design.

New urban economies

What is this publication about?In this publication on ‘New urban economies’, we search for answers and insights to a key question: how can cities foster economic development and develop ‘new urban economies’. And, importantly, how can they do that:◗ in concertation with different urban stakeholders, ◗ responding adequately to key challenges and developments beyond their control, ◗ building on the cities’ own identity, industries and competences, ◗ in a sustainable way, ◗ and without compromising weaker groups.

Are urban water bodies really cooling?

Small urban water bodies, like ponds or canals, are often assumed to cool their surroundings during hot periods, when water bodies remain cooler than air during daytime. However, during the night they may be warmer. Sufficient fetch is required for thermal effects to reach a height of 1–2 m, relevant for humans. In the ‘Really cooling water bodies in cities’ (REALCOOL) project thermal effects of typical Dutch urban water bodies were explored, using ENVI-met 4.1.3. This model version enables users to specify intensity of turbulent mixing and light absorption of the water, offering improved water temperature simulations. Local thermal effects near individual water bodies were assessed as differences in air temperature and Physiological Equivalent Temperature (PET). The simulations suggest that local thermal effects of small water bodies can be considered negligible in design practice. Afternoon air temperatures in surrounding spaces were reduced by typically 0.2 °C and the maximum cooling effect was 0.6 °C. Typical PET reduction was 0.6 °C, with a maximum of 1.9 °C. Night-time warming effects are even smaller. However, the immediate surroundings of small water bodies can become cooler by means of shading from trees, fountains or water mists, and natural ventilation. Such interventions induce favorable changes in daytime PET.