Analysis of Community Comfort in the Semarang Area Based on Temperature Distribution Values Using the Temperature Humidity Index

Abstract

The Semarang Area is the center of socio-economic activity, and manifold people come to improve their living standards. The increasing population growth in Semarang Area due to the rate of urbanization initiates the conversion of vegetation land into built-up land, which has implications for decreasing comfort. This study aimed to analyze community comfort based on the distribution of temperature and the Temperature Humidity Index (THI) in 1999, 2009, and 2019, analyze trends in community comfort based on the level of THI area and analyze the regression and correlation between temperature values and THI. Data processing applied Landsat 5 TM satellite imagery (1999, 2009) and Landsat 8 OLI satellite imagery (2019), google earth engine was utilized to obtain a temperature value. The quantitative data analysis method employed stratified random sampling. The data processing results obtained the highest temperature distribution (>31 °C) in the activity center area, while the temperature < 24 °C-29 °C in vegetated areas in Semarang Regency. Semarang City is recognized for its extremely high THI value (<27 °C (uncomfortable category)). In 1999, the area of THI of class 3 was 20219.8 ha, it increased to 28616.3 ha in 2009, and the largest area was in 2019 with 65481.7 ha. The THI value represents a high value, meaning that the area has a low comfort level, causing less comfortable for people to live in and vice-versa. The simple linear regression correlation test presented that the significant data were normally distributed and the graphs were positively related.