Spatiotemporal estimation of land surface temperature increase due to expansion of built-up areas in Mojokerto Regency in 2017-2023
Novia Lusiana (1)*, Adita Normalitasari (2)

(1) Environmental Engineering Study Program, Faculty of Agricultural Technology, Universitas Brawijaya, 65145, Malang, Indonesia
(2) Environmental Engineering Study Program, Faculty of Agricultural Technology, Universitas Brawijaya, 65145, Malang, Indonesia

*Email: novialusiana[at]ub.ac.id

Abstract

An increase in Land Surface Temperature (LST) is an indicator of global warming at the local scale and contributes to environmental degradation. The expansion of built-up areas over time is one of the main contributors to the increase in Land Surface Temperature (LST). This study focuses on evaluating the increase in LST across different land use types in Mojokerto Regency from 2017 to 2023 using the Normalized Difference Vegetation Index (NDVI) to estimate Land Surface Temperature (LST), and the Normalized Difference Built-Up Index (NDBI) to develop suitable recommendations for preventing future increases in LST. NDVI, NDBI, and LST were derived from Landsat 8 imagery analysis. A total of 106 and 292 sampling points were selected to represent temperature in build-up and vegetated areas, respectively. The results indicate that a 4.2 percent increase in built-up areas in Mojokerto between 2017 and 2023 led to an average LST increase of 2.33 degrees Celsius and a maximum increase of 4.51 degrees Celsius. The increase in temperature from 2017 to 2023 in vegetated areas is 3.26, 3.25, 4.15, and 4.23 degrees Celsius, in rural, industrial, and urban areas, respectively. The implementation of green walls, reflective roofs, and reflective walls is recommended to address rising air temperatures in Mojokerto Regency, particularly in areas with medium to high building density. This study is expected to serve as a consideration for policymakers in preserving vegetated areas to support sustainable development goals, particularly in combating climate change and its impacts.

Keywords: built-up areas, land surface temperature, Mojokerto, vegetated areas

Topic: Waste and environmental management and engineering