MAPPING KARST AND SLOPE HAZARDS IN PULASKI COUNTY, KENTUCKY USING HIGH-RESOLUTION LIDAR AND PETROGRAPHIC ANALYSIS

This study utilized high-resolution (1.5-meter) Light Detection and Ranging (LiDAR) Digital Elevation Model (DEM) data to identify and assess karst hazards and mass wasting events in Pulaski County, located in Kentucky’s Appalachian region. By integrating advanced LiDAR analysis with targeted field investigations, we aimed to uncover critical hazard zones, informing both public safety and local infrastructure protection.

A comprehensive mosaic of LiDAR data tiles was generated for downtown Somerset and the broader Pulaski County area. From this dataset, hillshade and slope maps were produced, showcasing elevation gradients and degrees of steepness across hills and knobs. Enhanced with color visualization, these maps revealed numerous slope hazards and an abundance of sinkholes, pinpointing areas of concern near homes, businesses, and transportation corridors.

Field investigations were strategically directed using LiDAR-derived hazard maps, facilitating the collection of soil and rock samples for petrographic analysis. Preliminary findings from petrographic microscopy indicate varying degrees of slope instability and landslide potential based on the composition of slope-forming materials. These results highlight significant risks to property and public safety, underscoring the importance of proactive hazard identification and mitigation strategies.

Ultimately, this research contributes to safeguarding critical assets, improving rural Appalachian resilience, and fostering community awareness of karst and slope hazards. By bridging geospatial data analysis and field-based geology, our project promotes sustainable hazard management and enhances the well-being of local residents.