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Title: Optimizing street canyon orientation for Rajarhat Newtown, Kolkata, India
Authors: Bhaskar D.E.
Mukherjee, Mahua
Published in: Environmental and Climate Technologies
Abstract: Air temperature in urban street canyons is increased due to the morphed urban geometry, increased surface area, decreased long wave radiation and evapo-transpiration, different thermo-physical properties of surface materials and anthropogenic heat which results in thermal discomfort. Outdoor thermal stress can be mitigated substantially by properly orienting the canyons. It is crucial for the urban planners and designers to orient street canyons optimally considering variable local climatic context. It is important especially for cities in warm humid climatic context as these cities receive higher insolation with higher relative humidity and low level macro wind flow. This paper examines influence of canyon orientation on outdoor thermal comfort and proposes the optimum canyon orientation for the Rajarhat Newtown, Kolkata – a city in warm humid climate zone. Different scenarios are generated with different orientations. Change in air temperature, wind speed, Mean Radiant Temperature (MRT) and Physiological Equivalent Temperature (PET) of different scenarios are compared to find out the optimum orientation by parametric simulation in ENVI_met. Analysing the simulation results it is observed that orientation angle between 30°–60° to north performs the best for the study area of the Rajarhat Newtown. The findings of this research will be helpful for the planners to orient the street canyons optimally for future development and extension of the Rajarhat Newtown, Kolkata. © 2017 Bhaskar De, Mahua Mukherjee.
Citation: Environmental and Climate Technologies(2017), 21(1): 5-17
Issue Date: 2017
Publisher: De Gruyter Open Ltd
Keywords: Kolkata
Outdoor thermal comfort
Street canyon orientation
Urban climate
Warm-humid climate
ISSN: 16915208
Author Scopus IDs: 57202281271
Author Affiliations: Bhaskar, D.E., Department of Architecture and Planning, Indian Institute of Technology, Roorkee, 247667, India
Mukherjee, M., Department of Architecture and Planning, Indian Institute of Technology, Roorkee, 247667, India
Corresponding Author: Bhaskar, D.E.; Department of Architecture and Planning, Indian Institute of TechnologyIndia; email:
Appears in Collections:Journal Publications [AR]

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