PEMETAAN EMISIVITAS PERMUKAAN DALAM FENOMENA PULAU PANAS PERMUKAAN PERKOTAAN (SURFACE URBAN HEAT ISLAND) BERDASARKAN CITRA ASTER (STUDI KASUS: BANDUNG RAYA, JAWA BARAT)

• Main Author: Afif, Faishal
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/42851
• Institution: Institut Teknologi Bandung

The phenomenon of Surface Urban Heat Island or SUHI refers to the modification of a local climate related to the process of urbanization in an area. Surfaces that were originally natural are replaced by those that are man-made. The main parameter that is the basis of this phenomenon, of course, is temperature or also called Land Surface Temperature (LST). An accurate value of the LST can be obtained if the surface emissivity is well characterized, where the two parameters are interconnected with the radiative displacement equation. A variation of 0,01 in emissivity will add an error of 0,5 oC at temperature. Bandung as one of the cities that is growing rapidly over time will surely reach this SUHI phenomenon. Remote sensing using Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) imagery can be used to see the distribution of emissivity obtained from the calculation of vegetation index, one of them is Normalization Difference Vegetation Index (NDVI) term. NDVI can be used as a reference as a proportion of vegetation or density. From previous studies, the proportion of vegetation can be reduced to an emissivity value with a form of linear algorithm. In addition to processing ASTER image data, land cover data is also used as a reference for emissivity values. Types of land cover in 2015 and 2018 will experience changes as humans will convert land into residential or built up areas. Furthermore, the emissivity value in 2 epoc years can be combined with land cover data in epoc the same year. The value of dense vegetation emissivity such as forests will have a high emissivity value of more than 0,983, then for medium vegetation such as gardens, fields, fields and shrubs in the range of 0,980 to 0,983, while for water body in the number 0,978 and settlements at the number 0,977. Each land cover with this value is used to identify the SUHI phenomenon in rural, sub-urban, and urban areas in cross sections as sample areas.