Effect urban development on urban heat island in Depok Subdistrict, Sleman Regency, Yogyakarta

Urban development follows population growth caused by various factors, both natural and non-natural. The increasing number of residents in Depok Subdistrict makes the demand for land also increase. Residential land that continues to develop can cause temperature conditions in Depok Subdistrict to increase or known as Urban Heat Island. This study purpose to determine how the influence of urban development on the Urban Heat Island phenomenon and to analyze the Urban Heat Island and land surface temperatures. This study concludes that there has been an urban heat island in Depok Subdistrict in 2014 with a distribution area of 49% of the total area of Depok Subdistrict and 51% non-UHI with a UHI threshold of 26.18 degrees C. Meanwhile, in 2019 there was a decrease in UHI. to 30% of the total area and 70% are in non-UHI areas with a UHI threshold of 27.18 degrees C. Although there is a decrease in UHI, the surface temperature of the soil has increased from 29.78 degrees C to 31.10 degrees C. In Depok Subdistrict population density does not affect the UHI value but the surface tribe value does affect the UHI index value.