Computational study of urban heat island of Putrajaya, Malaysia

Morris, Kenobi Isima; Salleh, Siti Aekbal; Chan, Andy; Ooi, Maggie Chel Gee; Abakr, Yousif Abdalla; Oozeer, Muhammad Yaasiin; Duda, Michael

doi:10.1016/j.scs.2015.04.010

Cited by 43 publications

(14 citation statements)

References 48 publications

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“…During the night the UHI ranges from 1.9 °C to 3.1 °C. The overall effect of urbanized local climate zones heating of Putrajaya is normalized by the total amount of area reserved for vegetation [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

An Evidence-Based Review of Impacts, Strategies and Tools to Mitigate Urban Heat Islands

Filho

Icaza

Emanche

et al. 2017

IJERPH

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The impacts of climate changes on cities, which are home to over half of the world’s population, are already being felt. In many cases, the intensive speed with which urban centres have been growing means that little attention has been paid to the role played by climatic factors in maintaining quality of life. Among the negative consequences of rapid city growth is the expansion of the problems posed by urban heat islands (UHIs), defined as areas in a city that are much warmer than other sites, especially in comparison with rural areas. This paper analyses the consistency of the UHI-related literature in three stages: first it outlines its characteristics and impacts in a wide variety of cities around the world, which poses pressures to public health in many different countries. Then it introduces strategies which may be employed in order to reduce its effects, and finally it analyses available tools to systematize the initial high level assessment of the phenomenon for multidisciplinary teams involved in the urban planning process. The analysis of literature on the characteristics, impacts, strategies and digital tools to assess on the UHI, reveals the wide variety of parameters, methods, tools and strategies analysed and suggested in the different studies, which does not always allow to compare or standardize the diagnosis or solutions.

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Section: Resultsmentioning

confidence: 99%

An Evidence-Based Review of Impacts, Strategies and Tools to Mitigate Urban Heat Islands

Filho

Icaza

Emanche

et al. 2017

IJERPH

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“…Kuala Lumpur which is originally located in a densely forested tropical region, has been experiencing a considerable rate of urbanization during the last decades. This trend of urban expansion is associated with emerging environmental issues such as reduction of forest cover, increasing the health concerns, polluting the rivers and affecting the fishery industry, as well as air pollution, and UHI effects (Morris, et al, 2015;Sahrir, Bachok, & Osman, 2014;Webb, 1998). Correspondingly, various schemes have been launched in order to regulate the negative effects of urbanization and direct Kuala Lumpur toward the so-called green and livable city by 2020, namely Kuala Lumpur Structure Plan 2020 (Kuala Lumpur Structure Plan, 2016), or Greener Kuala Lumpur project which aims to increase greenery in the city by planting 100,000 large-coverage trees by the year 2020 (EPP 6, 2016).…”

Section: B) Climate and Related Environmental Issuesmentioning

confidence: 99%

Urban heat island mitigation strategies: A state-of-the-art review on Kuala Lumpur, Singapore and Hong Kong

Aflaki

Mirnezhad

Ghaffarianhoseini

et al. 2017

Cities

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Observing the rapid urban expansions and numerous infrastructure developments in the East-Asian context, many cities are suffering the urban heat island (UHI) effect and its associated environmental and social challenges. Moreover, the lack of sufficient attention to the application of effective heat mitigation strategies in current urban development in these cities can drastically intensify the eventual impacts of UHI. Therefore, many governmental sectors and policy makers have been implementing operative solutions for cooling cities. Nevertheless, this study argues that in Kuala Lumpur, despite the growing attention to this matter, there is still a need for more rigorous consideration by the architecture, engineering and construction (AEC) professionals as well as more scholarly studies to reflect sustainable solutions to the UHI effect. As a result, today, some of the dense urban areas in Kuala Lumpur are characterized with the use of thermally massive building materials, urban surfaces with low albedo, complex urban morphology, waste heat, and low density of vegetation. On the other hand, recent studies demonstrate that there has been a rapidly increasing interest in studies related to UHI in other East Asian regions such as Singapore and Hong Kong. Hence, this study develops a comparative analysis to provide a state-of-the-art review of the recent attempts towards mitigating the UHI effect in Kuala Lumpur, Singapore, and Hong Kong. Among several available UHI mitigation strategies, this study is limited to the analysis of the environmental impacts of urban vegetation (green roofs, green facades, vertical greeneries and green pavements). Findings reveal that in general, urban greening can significantly mitigate the UHI intensity, both directly and indirectly, resulting in the decrease of global air temperature and mean radiant temperature up to 4 ˚C and 4.5 ˚C respectively. Overall, the study develops new practical guidelines, discusses the public benefits and elaborates on the future directions of UHI studies.

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“…Los enfoques de algunas investigaciones se han relacionado principalmente con la determinación y caracterización del clima e islas de calor urbano (Pérez et al, 2003;Rosenzweig et al, 2005;Wong y Yu, 2005;Chen et al, 2006;Santana, 2007;Yuan y Bauer, 2007;Morris et al, 2015). En Argentina, los estudios urbanos con imágenes satelitales son muy diversos y se orientan principalmente a las condiciones térmicas de los espacios verdes (Ripoll et al, 2010), o a la inferencia de la temperatura del aire a partir del NDVI (Cúnsulo et al, 2012), entre otros.…”

Section: Introductionunclassified

Utilización de imágenes satelitales para el estudio de la distribución térmica en distintas coberturas del suelo de la ciudad de Bahía Blanca (Argentina)

2015

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Resumen: El estudio del clima urbano es relevante para conocer el ambiente donde habita la mayor parte de la población. Las ciudades presentan sectores que incluyen estructuras edilicias, espacios verdes, suelos al descubierto, tránsito vehicular, necesidades calóricas de la ciudad y diferentes coberturas de sombras. Actualmente, el cambio climático y sus efectos sobre las ciudades son temas de gran interés científico. Son escasas las investigaciones que interpretan los cambios térmicos que se producen en el interior de las ciudades debido a la densificación de los edificios y como consecuencia de la variabilidad climática. Por tal motivo, el objetivo de este trabajo fue analizar el comportamiento de la Temperatura de Superficie Terrestre (TST) y su relación con las distintas coberturas del suelo en la ciudad de Bahía Blanca, Argentina. Para ello, se analizaron imágenes satelitales Landsat 5 TM y 7 ETM+ con el método monocanal. Además, se realizó un mapa de coberturas del suelo mediante interpretación visual de imágenes satelitales validado por intervención empírica. Posteriormente, se relacionaron los datos de TST con las coberturas del suelo. En el centro de la ciudad, la TST presentó variaciones espaciales heterogéneas según las estaciones del año y las sombras generadas por los edificios. Los mayores valores de TST se localizaron en la periferia (45,1°C) y en urbano muy disperso (46°C) y el menor en el centro de la ciudad (2°C). Las distintas coberturas del suelo generaron menores fluctuaciones de TST en invierno (>5°C) y las mayores en verano (entre 15 y 25°C).Palabras clave: Teledetección, TST, Bahía Blanca, clima urbano, coberturas del suelo. Utilization of satellite images to study the thermal distribution in different soil covers in Bahia Blanca city (Argentina)Abstract: The study of the urban climate is relevant to increase the knowledge about the environment where live most of the world's population. Cities have areas that include buildings, green spaces, un-vegetated soils, transit, among others. Currently, scientists are focusing on the effects of climate change in cities. There is a shortage of studies that analyze the thermal changes that occur in the inner city due to the densification of buildings. For these reasons, the aim of this study was to analyze the spatial distribution of Land Surface Temperature (LST) and its relation with different soil covers in Bahia Blanca city, Argentina. Satellite images from Landsat 5 TM and Landsat 7 ETM+ were analyzed with singlechannel method. Besides, it was made a soil coverage map through visual interpretation of satellite images and it was validated with field trips. LST data were compared with each soil coverage. In downtown, the LST was heterogeneous and presented spatial variations according to the season and the shadows of the buildings. The maximum values of LST were localized in the periphery (45.1°C) and in urban very sparse (46°C) and the minimum in downtown (2°C). Each soil cover had minor fluctuations in the winter (>5°C) and higher in the summe...

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Computational study of urban heat island of Putrajaya, Malaysia

Cited by 43 publications

References 48 publications

An Evidence-Based Review of Impacts, Strategies and Tools to Mitigate Urban Heat Islands

An Evidence-Based Review of Impacts, Strategies and Tools to Mitigate Urban Heat Islands

Urban heat island mitigation strategies: A state-of-the-art review on Kuala Lumpur, Singapore and Hong Kong

Utilización de imágenes satelitales para el estudio de la distribución térmica en distintas coberturas del suelo de la ciudad de Bahía Blanca (Argentina)

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