The impact of urban green infrastructure as a sustainable approach towards tropical micro-climatic changes and human thermal comfort

Galagoda, R.U.; Jayasinghe, G.Y.; Halwatura, RU; Rupasinghe, H.T.

doi:10.1016/j.ufug.2018.05.008

Cited by 75 publications

(43 citation statements)

References 51 publications

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“…In addition to that, Figures 5e and 6e show the power of vegetated land that behaves as a heatsink. Vegetated land can regulate the SUHI effect, as past research also proved, even in Sri Lanka [45]. Planting trees around parks, residential areas, and along roads leads to shaded IS, and it encourages air circulation in the urban area to make the environment more livable.…”

Section: Implication Of Results For Suhi Mitigation and Adaptationmentioning

confidence: 95%

“…Various studies were conducted to understand the effect of SUHI across the world [45,46]; these attempts also elaborated solutions to counteract SUHI effects by applying necessary mitigation and adaptation practices. Enhancing vegetated spaces in urban areas or the concept of the land-use mixture (a mixture of impervious surfaces and green spaces) was identified as an appropriate mitigation approach, which our results also proved.…”

Section: Implication Of Results For Suhi Mitigation and Adaptationmentioning

confidence: 99%

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Land-Use/Land-Cover Changes and Their Impact on Surface Urban Heat Islands: Case Study of Kandy City, Sri Lanka

Dissanayake

Morimoto

Ranagalage

et al. 2019

Climate

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An urban heat island (UHI) is a phenomenon that shows a higher temperature in urban areas compared to surrounding rural areas due to the impact of impervious surface (IS) density, and other anthropogenic activities including changes of land use/land cover (LULC). The purpose of this research is to examine the spatiotemporal land-use/land-cover changes and their impact on the surface UHI (SUHI) in Kandy City, Sri Lanka, using Landsat data and geospatial techniques. LULC classification was made by using a pixel-oriented supervised classification method, and LULC changes were computed by using a cross-cover comparison. The SUHI effect was discussed mainly through the variation of land-surface temperature (LST) over persistent IS and newly added IS. The study showed the dynamics of each LULC and its role in the SUHI. The results showed that IS areas expanded from 529 to 1514 ha (2.3% to 6.7% of the total land area) between 1996 and 2006, and to 5833 ha (23.9% of the total land area) in 2017, with an annual growth rate of 11.1% per year from 1996 to 2006 and 12.2% per year from 2006 to 2017. A gradually declining trend was observed in forest areas. Persistent IS reported the highest mean LST areas compared to newly added IS. The mean LST difference between persistent IS and newly added IS was 1.43 °C over the study period. This is because areas of persistent IS are typically surrounded by IS even in their neighborhoods, whereas areas of newly added IS occur at the edges of the city and are, therefore, cooled by the surrounding nonurban surfaces. This calls for appropriate green-oriented landscape-management methods to mitigate the impact of the SUHI in Kandy City. The findings of the study showed that LULC changes and their effect on the SUHI from 1996 to 2017 made a significant contribution to long records of change dynamics.

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Section: Implication Of Results For Suhi Mitigation and Adaptationmentioning

confidence: 95%

Section: Implication Of Results For Suhi Mitigation and Adaptationmentioning

confidence: 99%

Land-Use/Land-Cover Changes and Their Impact on Surface Urban Heat Islands: Case Study of Kandy City, Sri Lanka

Dissanayake

Morimoto

Ranagalage

et al. 2019

Climate

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“…The buildings with green walls are one of the alternative methods of increasing the green areas inside the city limits. Previous research has shown that green walls were capable of declining indoor temperatures by 2.4 • C [46]. The authors firmly believe that the existing urban policies are not sufficient for enhancing the urban greening concept of this city.…”

Section: Implications For Urban Sustainabilitymentioning

confidence: 82%

Quantifying Surface Urban Heat Island Formation in the World Heritage Tropical Mountain City of Sri Lanka

Ranagalage

Dissanayake

Murayama

et al. 2018

IJGI

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Presently, the urban heat island (UHI) phenomenon, and its adverse impacts, are becoming major research foci in various interrelated fields due to rapid changes in urban ecological environments. Various cities have been investigated in previous studies, and most of the findings have facilitated the introduction of proper mitigation measures to overcome the negative impact of UHI. At present, most of the mountain cities of the world have undergone rapid urban development, and this has resulted in the increasing surface UHI (SUHI) phenomenon. Hence, this study focuses on quantifying SUHI in Kandy City, the world heritage tropical mountain city of Sri Lanka, using Landsat data (1996 and 2017) based on the mean land surface temperature (LST), the difference between the fraction of impervious surfaces (IS), and the fraction of green space (GS). Additionally, we examined the relationship of LST to the green space/impervious surface fraction ratio (GS/IS fraction ratio) and the magnitude of the GS/IS fraction ratio. The SUHI intensity (SUHII) was calculated based on the temperature difference between main land use/cover categories and the temperature difference between urban-rural zones. We demarcated the rural zone based on the fraction of IS recorded, <10%, along with the urban-rural gradient zone. The result shows a SUHII increase from 3.9 • C in 1996 to 6.2 • C in 2017 along the urban-rural gradient between the urban and rural zones (10 < IS). These results relate to the rapid urban expansion of the study areas from 1996 to 2017. Most of the natural surfaces have changed to impervious surfaces, causing an increase of SUHI in Kandy City. The mean LST has a positive relationship with the fraction of IS and a negative relationship with the fraction of GS. Additionally, the GS/IS fraction ratio shows a rapid decline. Thus, the findings of this study can be considered as a proxy indicator for introducing proper landscape and urban planning for the World Heritage tropical mountain city of Kandy in Sri Lanka.

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“…Correlations between authors and keywords were analyzed with the bibliometric analysis software VOSviewer [29]. VOSviewer is a freely available software for generating bibliometric maps of scientific fields, showing its versatility (i.e., food chemistry [30], artificial intelligence [31], health [32], social sciences [33], and neuroscience [34]). VOSviewer implements the visualization of similarities mapping technique [35], where networks are drawn in which the distances between nodes show the levels of closeness between them.…”

Section: Of 24mentioning

confidence: 99%

Comparative Analysis of Web of Science and Scopus on the Energy Efficiency and Climate Impact of Buildings

2020

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Although the body of scientific publications on energy efficiency and climate mitigation from buildings has been growing quickly in recent years, very few previous bibliometric analysis studies exist that analyze the literature in terms of specific content (trends or options for zero-energy buildings) or coverage of different scientific databases. We evaluate the scientific literature published since January 2013 concerning alternative methods for improving the energy efficiency and mitigating climate impacts from buildings. We quantify and describe the literature through a bibliometric approach, comparing the databases Web of Science (WoS) and Scopus. A total of 19,416 (Scopus) and 17,468 (WoS) publications are analyzed, with only 11% common documents. The literature has grown steadily during this time period, with a peak in the year 2017. Most of the publications are in English, in the area of Engineering and Energy Fuels, and from institutions from China and the USA. Strong links are observed between the most published authors and institutions worldwide. An analysis of keywords reveals that most of research focuses on technologies for heating, ventilation, and air-conditioning, phase change materials, as well as information and communication technologies. A significantly smaller segment of the literature takes a broader perspective (greenhouse gas emissions, life cycle, and sustainable development), investigating implementation issues (policies and costs) or renewable energy (solar). Knowledge gaps are detected in the areas of behavioral changes, the circular economy, and some renewable energy sources (geothermal, biomass, small wind). We conclude that (i) the contents of WoS and Scopus are radically different in the studied fields; (ii) research seems to focus on technological aspects; and (iii) there are weak links between research on energy and on climate mitigation and sustainability, the latter themes being misrepresented in the literature. These conclusions should be validated with further analyses of the documents identified in this study. We recommend that future research focuses on filling the above identified gaps, assessing the contents of several scientific databases, and extending energy analyses to their effects in terms of mitigation potentials.

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The impact of urban green infrastructure as a sustainable approach towards tropical micro-climatic changes and human thermal comfort

Cited by 75 publications

References 51 publications

Land-Use/Land-Cover Changes and Their Impact on Surface Urban Heat Islands: Case Study of Kandy City, Sri Lanka

Land-Use/Land-Cover Changes and Their Impact on Surface Urban Heat Islands: Case Study of Kandy City, Sri Lanka

Quantifying Surface Urban Heat Island Formation in the World Heritage Tropical Mountain City of Sri Lanka

Comparative Analysis of Web of Science and Scopus on the Energy Efficiency and Climate Impact of Buildings

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