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Investigating the major causes of morphological transformations in the CBD of Accra and the impact on urban heat island intensity.

Gyasi-Addo, James Adjei; Bennadji, Amar

Authors

James Adjei Gyasi-Addo



Contributors

Lloyd Scott
Editor

Christopher J. Neilson
Editor

Abstract

Tropical urban sites are constantly under the threats of the adverse effects of urban heat island (UHI) - a situation which is aggravated by climate change. Urban morphology comprises a large set of factors that play an important role in modifying urban climate and, consequently, the potential energy demand and supply in cities. Ghana has since independence, experienced a rapid population growth, which has resulted in the urbanisation of many of its towns. The influx of people into the urban areas means there is a high demand for more housing, commercial and other infrastructural developments. For Accra however, this drive has resulted in drastic reduction in urban greenery. The aim of this study is to investigate the main causes of morphological transformations that have occurred in Accra over the past few decades, with the view to identifying possible measures for UHI mitigation. This study employs a mixed-methods research approach. First, to gain an in-depth understanding of the underlying causes of the morphological transformation the city has undergone, qualitative data are gathered through desktop studies and face-to-face semi-structured interviews with some experienced Ghanaian built environment professionals. The quantitative study involves the collection of weather data from selected monitoring points in the city. Upon analysing the qualitative data, other major causes of the morphological transformations that have emerged include poor enforcement of development control, non-adherence to building regulations; inadequacies in the existing building regulations; architects and building designers lacking the motivation for sustainable design etc. It is evident that areas with large expanse of hardscapes and significantly reduced greenery are experiencing high UHI intensities. Recommendations include measures which address the identified challenges as well as urban regeneration.

Citation

GYASI-ADDO, J.A. and BENNADJI, A. 2020. Investigating the major causes of morphological transformations in the CBD of Accra and the impact on urban heat island intensity. In Scott, L. and Neilson, C.J. (eds.) Proceedings of the 36th Association of Researchers in Construction Management (ARCOM) annual conference 2020 (ARCOM 2020), 7-8 September 2020, [virtual conference]. Leeds: ARCOM [online], pages 566-575. Available from: http://www.arcom.ac.uk/-docs/archive/2020-Indexed-Papers.pdf

Conference Name 36th Association of Researchers in Construction Management annual conference 2020 (ARCOM 2020)
Conference Location [virtual conference]
Start Date Sep 7, 2020
End Date Sep 8, 2020
Acceptance Date Jul 8, 2020
Online Publication Date Sep 8, 2020
Publication Date Dec 31, 2020
Deposit Date Dec 11, 2020
Publicly Available Date Dec 11, 2020
Publisher ARCOM Association of Researchers in Construction Management
Pages 566-575
Book Title Proceedings of 36th Association of Researchers in Construction Management annual conference 2020 (ARCOM 2020)
ISBN 9780995546332
Keywords Urban heat island; Urban morphology; Morphological transformation
Public URL https://rgu-repository.worktribe.com/output/1005474
Publisher URL https://www.arcom.ac.uk/conf-archive-indexed.php

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