Mapping of Landslide Potential in Payung, Batu City, Indonesia, Using Global Gravity Model Plus (GGMplus) Data as Landslide Mitigation

Abstract

Several areas in Batu City, Indonesia, often experience landslides when entering the rainy season; landslides occur at several points, including the Payung area on Jalan Trunojoyo. This area connects several districts in East Java, such as Malang Regency, Kediri City, and Jombang Regency. If this area experiences a landslide, the access road will be closed, forcing road users to look for another route that is further away. This study aims to map areas potentially prone to landslides on the Payung tourism road in Batu City, Indonesia. Gravity anomaly measurements were carried out using gravity data from the GGMplus satellite with a distance between data points of 220 m. The processing results are then correlated with the landslide hazard map made by InaRISK BNPB. Based on the residual anomaly map, the measured values are between -13.4 to -5 mgal (low), -5 to 5 mgal (moderate), and 5 to 12 mgal (high). Where the low zone shows the area with the lowest density, the low-density zone has a large enough landslide potential. So, the Trunojoyo road in the Payung area, Batu City, is a landslide-prone zone with very low rock density. The results of this study are expected to provide recommendations for mitigating landslides to the local government.