tailieunhanh - The effect of green space on the land surface temperature in Hue city

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. | Vietnam Journal of Science and Technology 55 (4C) (2017) 129-135 THE EFFECT OF GREEN SPACE ON THE LAND SURFACE TEMPERATURE IN HUE CITY Nguyen Bac Giang*, Do Thi Viet Huong Hue University of Sciences, Hue University, 77 Nguyen Hue Str., Hue city, Vietnam * Email: nguyenbacgiang@ Received: 15 August 2017; Accepted for publication: 16 October 2017 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 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. Keywords: green space, Hue city, land surface temperature, Landsat 8. 1. INTRODUCTION Land surface temperature (LST) is a universal and important parameter for characterizing the urban thermal environment and was utilized in various fields of studies (climate, agriculture, bio-geo-chemistry), particularly, in urban human comfort researches [1]. The LST of urban surface corresponds closely to the characteristic structure,