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A Geomorphic Mapping-based Approach to Evaluate Site
Selection of Energy Transmission Lines Using Airborne LiDAR Data

Mass movements and surface erosion are one of the most important geomorphological hazards that threaten the safety of Power Transmission Lines. In this context, it is important to conduct susceptibility and hazard analysis in terms of mapping the mass movements and surface erosion of the Power Transmission Lines on routes, creating their inventory, and then taking precautions for geomorphological hazards that may occur for the safety of the line. Power Transmission Lines often pass through high areas with dense vegetation and problematic fields in terms of terrain observations.

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Figure. Landslides and geomorphological relative hazard classification on the energy transmission line route.

In our study, we use Airborne LiDAR Data to minimize the problems that may occur in geomorphological mapping units on the ground. With LiDAR laser scanning, it enables us to obtain high-resolution elevation data from all surfaces where light can penetrate across a wide spectrum between green light and near-Infrared. In this context, we are able to precise mapping with the Digital Elevation Model  (DEM) and Digital Surface Model (DSM), which we create from the high-resolution elevation data. We use morphometric parameters such as Topographic Wetness Index  (TWI) and Stream Power Index  (SPI) to detect the development of long-term landslide activity. Depending on all these mapping, inventory, and analyses, we plan to turn experience-based geomorphological mapping into a rule-based geomorphological mapping system.

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