Sedimentation Dynamics and Seismic Vulnerability Using Integrated VSM-HVSR Analysis in Lake Limboto for Disaster Mitigation

Abstract

Lake Limboto, located in the Gorontalo basin, is experiencing significant degradation due to sedimentation exacerbated by deforestation and unsustainable agricultural practices. Sedimentation dynamics in Lake Limboto are shaped by a combination of natural and anthropogenic processes, including erosion from the catchment area and waste generated by human activities. These processes contribute to the accumulation of thick and soft sediment layers, which in turn increases seismic vulnerability. This study aims to analyze the sedimentation dynamics and seismic vulnerability of Lake Limboto using an integrative approach that combines Vibrating Sample Magnetometer (VSM) and Horizontal-to-Vertical Spectral Ratio (HVSR) methods. This dual methodology approach provides a comprehensive understanding of the linkages between sedimentation processes and seismic hazard risk.