Better layout of city blocks
Drawing on 15 years’ experience in the field of climate engineering, Ramboll has reached the same conclusion.
Ramboll designers study the urban landscape of a particular area by assessing its natural systems: its landforms, hydrology, vegetation and climate. Creating more sustainable urban design requires an understanding of the urban microclimate – its wind distribution, pollutant level and thermal comfort characteristics – at every stage of the design process.
In Hong Kong, the SARS outbreak in 2003 caused nearly 300 deaths, thus prompting the city to take measures to improve its environmental hygiene. The aim was – and is – to mitigate the urban heat island effect and other negative consequences of urbanisation through initiatives that promote a better layout of city blocks.
“Since 2005, air ventilation assessments have become an essential part of town planning, concentrating on how planning can influence and improve the general living environment, quality and sustainability of Hong Kong,” explains Steve Lo, environmental consultant at Ramboll Environment & Health in Hong Kong.
3D air simulation tool
Ramboll’s air ventilation assessments typically entail identifying open playgrounds, bus stops, footbridge entrances and other important pedestrian areas.
For that purpose, Ramboll has applied the 3D air simulation tool “Computational Fluid Dynamics” – a way of investigating the flow, energy transport, chemical reactions, combustion, etc., in an urban setting.
The tool can also be used on a smaller scale. In the Danish town of Køge, Ramboll is analysing how local winds from the open sea affect the planned city development – and using the findings to optimise the shape and location of buildings and thus create pedestrian and living zones that afford maximum comfort for future residents.