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

Show simple item record

dc.contributor.author Dissanayake, DMSLB
dc.date.accessioned 2022-01-05T16:51:16Z
dc.date.available 2022-01-05T16:51:16Z
dc.date.issued 2018
dc.identifier.uri http://repository.rjt.ac.lk/handle/123456789/3229
dc.description.abstract Abstract: 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. en_US
dc.language.iso en en_US
dc.subject : land surface temperature en_US
dc.subject urban heat island en_US
dc.subject urban heat island intensity en_US
dc.subject gradient analysis en_US
dc.subject ; Kandy City; Sri Lanka en_US
dc.title Quantifying Surface Urban Heat Island Formation in the World Heritage Tropical Mountain City of Sri Lanka en_US
dc.type Article en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search RUSL-IR


My Account