Satellite imagery detection of land destruction in Klapanunggal Karst Landscape induced by limestone surface mining

¹ Department of Geography, Faculty of Mathematics and Natural Sciences, Universitas Indonesia, Depok, 16424, Indonesia
² Acintyacunyata Speleological Club, Yogyakarta, 55171, Indonesia
³ School of Environmental Science, Universitas Indonesia, Jakarta, 10430, Indonesia
⁴ Karst Progressive Research Group, Depok, 16412, Indonesia

^* Corresponding author: ridwan.arif@ui.ac.id

Abstract

Limestone mining activities in the Klapanunggal Karst Landscape were carried out at surface level. This method induced several adverse impacts on the environment. This study aimed to detect land destruction in the Klapanunggal Karst Landscape triggered by open limestone mining on the surface in the 2014-2020 period. The supervised classification method of Maximum Likelihood Estimation (MLE) was used to detect the change in land cover from Landsat 8 imagery, and Differential Interferometric Synthetic Aperture Radar (DInSAR) was applied to detect the change in landform from Sentinel 1A imagery. As a result, between 2014 to 2020, open limestone mining in the Klapanunggal Karst Landscape was confirmed to have a significant impact on the land cover changes in Klapanunggal, from an area with full of vegetation to a mining area with 4.0 x 10⁶ m² wide, and eroded landform with a dominant land deformation rate in the range of -47.75 to -39.50 cm/year and -39.50 to -31.25 cm/year. The limestone mining activity in the period of 2014 2020 was estimated to have mined limestone with a volume of 30.7 x 10⁶ m³. Limestone surface mining has destructed Klapanunggal Karst Landscape, further research was needed to examine the adverse impacts on the hydrogeological system.