The safe operation of pipelines transporting natural gas is crucial to meet the energy demands of modern societies, but geohazards pose significant challenges to their integrity. This study evaluates the impact of geohazards, namely landslides, high peak ground acceleration (PGA), liquefaction and surface rupture on natural gas pipelines. These hazards caused several incidents on the pipelines during the devastating Kahramanmaras Earthquakes occurred on 6 February 2023 (Mw 7.7 and Mw 7.6) in southeastern Türkiye. A total of 21 incidents were inventoried through field observations and visual assessment of aerial images with a nominal spatial resolution of 25 cm taken soon after the earthquakes. Besides the inventory compilation, landslide and liquefaction susceptibility maps of the area with 25 m resolution produced using supervised machine learning methods were assessed at the incident locations. The investigations carried out in this study showed a high correlation with medium to high susceptibility levels of one or more geohazards listed above. The study outcomes also indicated that involving accurate geohazard susceptibility maps in the route design and continuous monitoring of natural gas pipelines route is essential for taking the necessary pre-cautions and for improving the disaster preparedness. Understanding the vulnerability and potential threats helps implementing targeted measures and protecting the critical energy supply lines. The findings of this study also contribute to enhancing the resilience of natural gas pipeline infrastructure worldwide.

中文翻译：

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2023 年 2 月 6 日卡赫拉曼马拉什地震（7.7 级和 7.6 级）引发的地质灾害对天然气管道的影响评估

天然气输送管道的安全运行对于满足现代社会的能源需求至关重要，但地质灾害对其完整性构成了重大挑战。本研究评估了地质灾害，即山体滑坡、高峰值地面加速度（PGA）、液化和地表破裂对天然气管道的影响。在 2023 年 2 月 6 日土耳其东南部发生的毁灭性卡赫拉曼马拉斯地震（7.7 级和 7.6 级）期间，这些危险导致管道发生多起事故。通过实地观察和对地震后不久拍摄的标称空间分辨率为 25 厘米的航空图像进行目视评估，总共清查了 21 起事件。除了清单编制外，还对事故地点使用监督机器学习方法生成的分辨率为 25 m 的滑坡和液化敏感性图进行了评估。本研究中进行的调查表明，与上述一种或多种地质灾害的中高易发性水平具有高度相关性。研究结果还表明，在路线设计中纳入准确的地质灾害敏感性地图以及对天然气管道路线的持续监测对于采取必要的预防措施和提高备灾能力至关重要。了解脆弱性和潜在威胁有助于实施有针对性的措施并保护关键的能源供应线。这项研究的结果也有助于增强全球天然气管道基础设施的弹性。