Land Surface Temperature and Geomorphology of Tiris Geothermal Area, Lamongan Volcano Complex, Probolinggo, East Java, Indonesia

Abstract

The research applied the remote sensing method to map land surface temperature (LST) distribution and geomorphological of Tiris geothermal area (TGA) in Lamongan Volcano Complex. This study was conducted in an area of 73 km 2 covering both TGA and Lamongan Volcanic Field (LVF). The LST distribution was gained by processing thermal infrared images Landsat-8. Geomorphological studies in the study area were done by using 567 bands composite multispectral images Landsat-8 and DEM SRTM data. The geomorphological condition was depicted by visual delineation to the map of 567 band composite and 3D topographical model. The findings argued that the study area had a LST distribution of 15.84℃ to 41.05℃. The hot spots in the study area were mostly located in built-up area and bare land. There was no high LST anomaly seen in the areas near TGA due to influenced by a mixed temperature between hot springs and water flow temperature of Tancak River. Geomorphological findings clarified that in Lamongan Volcano, there were two lineaments leading to the northwest-southeast and northwesteast and there was a fault in TGA leading to northwest-southeast associated with Tancak watershed.