Depicting the Underground River Systems in Karst Mountains of Buayan and Ayah Subdistricts Using GGMPlus Data and Springs Distribution

The karst mountain area in Buayan and Ayah subdistricts is a mountainous that stretches from North to South ends the coast region. In this area, many springs are found which source of clean water for residents. existence an indicator underground rivers flowing under also reinforced by presence interconnected caves river flows these caves. Analysis Karst study can be identified looking at type rock formations dominate area. density contrast shown through residual gravity data shows changes related sources GGMPlus was obtained forward modeling order get map. This conform topographical shape.