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New Climatic Indicators for Improving Urban Sprawl: A Case Study of Tehran City

Department of Geography, Golestan University, Shahid Beheshti 49138-15759, Gorgan, Iran
Department of Energy and M.P. University of A Coruña, Paseo de Ronda 51, 15011 A Coruña, Spain
Department of Industrial Engineering. University of A Coruña, Avda 19 de febrero, 15405 Ferrol, Spain
Author to whom correspondence should be addressed.
Entropy 2013, 15(3), 999-1013;
Received: 17 February 2013 / Revised: 4 March 2013 / Accepted: 5 March 2013 / Published: 7 March 2013
(This article belongs to the Special Issue Entropy and Urban Sprawl)
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In the modern world, the fine balance and delicate relationship between human society and the environment in which we exist has been affected by the phenomena of urbanisation and urban development. Today, various environmental factors give rise to horizontal dispersion, spread and growth of cities. One of the most important results of this is climatic change which is directly affected by the urban sprawl of every metropolis. The aim of this study is to identify the relationship between the various horizontally distributed components of Tehran city and changes in essential microclimate clusters, by means of the humidex index. Results showed that, when the humidex was calculated for each of the obtained clusters, it was evident that it had increased with time, in parallel with Shannon’s entropy, as a consequence of the average temperature and relative humidity of each cluster. At the same time, results have shown that both temperature and relative humidity of the study area are related with urban sprawl, urbanisation and development, as defined by Shannon’s entropy and, in consequence, with humidex. In consequence, this new concept must be considered in future research works to predict and control urban sprawl and microclimate conditions in cities. View Full-Text
Keywords: Tehran; boundary; entropy; clustering; microclimatology; thermal comfort Tehran; boundary; entropy; clustering; microclimatology; thermal comfort

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Ghanghermeh, A.; Roshan, G.; Orosa, J.A.; Calvo-Rolle, J.L.; Costa, Á.M. New Climatic Indicators for Improving Urban Sprawl: A Case Study of Tehran City. Entropy 2013, 15, 999-1013.

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