Landslide Vulnerability Assessment Methodology for High Voltage Electric Transmission Towers

Date

2024-9-5

Author

Koç, Hale Nurefsan

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Critical infrastructures such as high-voltage power transmission lines play a vital role in the smooth functioning of societies. However, these lines are vulnerable to natural disasters, especially landslides. There is a significant knowledge gap regarding the vulnerability of transmission towers to landslide risks. This study aims to develop new methodologies to assess the vulnerability of high-voltage power transmission lines, which are increasingly at risk from natural disasters, especially landslides. There is a significant knowledge gap regarding the vulnerability of transmission towers to landslide risks. In this study, firstly, the damages incurred by the towers due to landslides were examined in detail and classified. Subsequently, two different methodologies were developed to assess the vulnerability of the towers to landslide hazards. The first methodology is a qualitative assessment method based on expert opinions. Through surveys conducted with experts in engineering, geology, and other relevant disciplines, the average vulnerability values of the towers under different conditions were determined. The experiences and knowledge accumulated by experts over many years played a significant role in these assessments. The second methodology is a semi-quantitative indicator-based vulnerability index (IBVI) developed to numerically assess the vulnerability of the towers. IBVI is an assessment system that assigns specific weights to various factors to determine how vulnerable an electric transmission tower is to landslides. Both developed methods will be verified and improved through pilot applications. LiDAR data obtained from landslide-affected areas will be used as an important data source in this process. The primary objective of this study is to contribute to the development of effective mitigation strategies by establishing a robust framework for assessing the vulnerability of towers to landslide risks. An additional goal is to help decision-makers prioritize the allocation of limited resources to the most vulnerable lines by creating a framework called "Decision Support. " This framework aims to minimize power outages in the face of natural disasters and ensure that societies receive services more securely. In conclusion, this study will be a significant step in improving the reliability of electric transmission systems and mitigating the negative impacts of natural disasters.

Subject Keywords

Critical infrastructure, High voltage electricity transmission line tower, Physical vulnerability assessment, Landslide

URI

https://hdl.handle.net/11511/111521

Collections

Graduate School of Natural and Applied Sciences, Thesis