The Effect of Green Space on the Land Surface Temperature in Hue City

Abstract

This paper presents the analysis of the effect of urban green space types on land surface temperature in Hue city. Data are collected with temperature monitoring results from each green space type and the interpretation of surface temperature based on Landsat 8 satellite image data to determine temperatures at different times of the year. Results showed that there was a significant correlation between types of urban green space and the surface temperature. Types of green space with a large area and vegetation indexes have a greater effect on temperature than areas with a smaller green space do. Green space types including forest green space, dedicated green space and agriculture green space have the most effect on the surface temperature. The forest area has the greatest influence on the temperature with a temperature difference of more than 1.6 degrees Celsius at 9:00 in the daytime. Besides, the results extracted from satellite images also show that the area of urban green space going to be reduced makes a contribution to increase the surface temperature of urban areas. The study results have established foundation for planning the green spaces in climate change challenges in Hue City.

Variations in land surface temperatures in small-scale urban areas in Vietnam during Covid-19 restrictions: Case studies from Da Nang, Hue and Vinh City

“…However, the rise in population growth and tourism in Hue have caused deterioration of green spaces (Dinh & Pham, 2021 ), which is evident from NDVI and LST maps derived from the present study. A considerable reduction in LST patterns (1.6 °C during the day time) was reported from Hue from greenish areas of the city compared to the built-up areas (Nguyen, 2017 ). In addition, a recent study (Le Phuc et al, 2022 ) observed that a large number of waterbodies (river channels, lakes) in Hue city has some cooling effects and reduce the extend of UHI.…”