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Analysis of urban heat islands with landsat satellite images and GIS in Kuala Lumpur Metropolitan City. | LitMetric

AI Article Synopsis

  • Cities are expanding due to urban population growth, which increases temperature through urban heat islands, particularly observed in areas like Kuala Lumpur, Malaysia.
  • The study utilizes thermal remote sensing from satellites to analyze land surface temperature changes and the impact of urbanization, comparing data from 2013 and 2021.
  • Results indicate significant temperature differences between urban and rural areas, with regions like Sungai Batu experiencing higher temperatures due to reduced vegetation, while Bukit Ketumbar showed lower temperatures due to its woodland coverage.

Article Abstract

Cities are growing geographically in response to the enormous increase in urban population; consequently, comprehending growth and environmental changes is critical for long-term planning. Urbanization transforms naturally permeable surfaces into impermeable surfaces, causing an increase in urban land surface temperature, leading to the phenomenon known as urban heat islands. The urban heat islands are noticeable across Malaysia's rural communities and villages, particularly in Kuala Lumpur. These effects must be addressed to slow, if not halt, climate change and meet the Paris Agreement's 2030 goal. The study posits an application of thermal remote sensing utilizing a space-borne satellite-based technique to demonstrate urban evolution for urban heat island analysis and its relationship to land surface temperature. The urban heat island (UHI) was analyzed by converting infrared radiation into visible thermal images utilizing thermal imaging from remote sensing techniques. The heat island is validated by reference to the characteristics of the normalized difference vegetation index (NDVI), which define the land surface temperature (LST) of distinct locations. Based on the digital information from the satellite, the highest temperature difference between urban and rural regions for a few chosen cities in 2013 varied from 10.8 to 25.5 °C, while in 2021, it ranged from 16.1 to 26.73 °C, highlighting crucial temperature changes. The results from ANOVA test has substantially strengthened the credibility of the significant temperature changes. Some notable reveals are as follows: The Sungai Batu area, due to its rapid development and industry growth, was more vulnerable to elevated urban heat due to reduced vegetation cover; therefore, higher relative vulnerability. Contrary, the Bukit Ketumbar area, which region lies in the woodland region, experienced the lowest, with urban heat islands reading from 2013 at -0.3044 and 0.0154 in 2021. It shows that despite having urban heat islands increase two-fold from 2013 to 2021, increasing the amount of vegetation coverage is a simple and effective way of reducing the urban heat island effect, as evidenced by the low urban heat islands in the Bukit Ketumbar woodland region. The study findings are critical for advising municipal officials and urban planners to decrease urban heat islands by investing in open green spaces.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10404694PMC
http://dx.doi.org/10.1016/j.heliyon.2023.e18424DOI Listing

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