VARIASI TEKNIK SYNTHETIC APERTURE RADAR (SAR) UNTUK REKONSTRUKSI GEOLOGI KABUPATEN PIDIE JAYA PROVINSI ACEH

Abstract

Geology information has an important role in development planning in Indonesia especially in physical development so that it needs to be well laid out in order to give the complete information. The objectives of the study are: First, integrating result of the SAR technique processing to image fusion technique to identify geological structure, landform and litology in Pidie Jaya region, Aceh province and Second, testing ability of SAR technique and image fusion technique in geology reconstruction in Pidie Jaya region. This study was done in most parts of Pidie Jaya and Pidie region using the main data that were Sentine-1A with VH polarization and Landsat 8 OLI with 567 composite. The methods used are digital image processing and field observation. Digital image processing uses some techniques including: SAR technique (calibration, multilook, deburst, median speckle filtering, geometric correction), InSAR tecnique to create DEM, HSV image fusion and directional spatial filter techniques (3x3 and 5x5 windows) to identify landform, geological structure and litology through visual interpretation. Field observation was done through strike and dip measuring with purposive sampling method. Results of HSV fusion technique visual interpretation can identify structural landform, volcanic landorm, fluvial landform, drainage patterns and litology. Results of directional filter visual interpretation can identify lineament, fault and fold. Geological structure in study region has dominant direction South West – North East or 42.4 o – 223.63 o . The study region is dominated by structural landform with an area of 555.39 km 2 or 59.56 % of study area total with accuration 86.04 %. Litology which dominates in study area is sandstone with an area of 571.78 km 2 or 61.31 % of study area total with accuration 82.93 %.