Slope instabilities adjacent to transportation corridors require timely and precise assessment to determine the risk to road users, particularly when weather changes trigger these instabilities. In southern Alberta, Canada, near the town of Drumheller, a 500-m-long, 60-m-high slope adjacent to Highway 837 has a history of slope instabilities that includes rockfalls, frozen soil falls, and debris flows. The slope failures have blocked the road which increases user and maintenance costs. Due to unsafe conditions and the steepness of the slope (1H:1V inclination), it was only possible to undertake visual assessments of the slope conditions from the road. Advances in unmanned aerial vehicle (UAV) technology have resulted in a quick and safe tool for collecting detailed photographic records of the slope conditions. The combination of UAV data and photogrammetry methods allows engineers to remotely, safely, and quickly perform a precise assessment of the slope instabilities. The paper demonstrates the use of UAV-derived data to evaluate the following: critical instability areas in practice; the magnitude of instability events; the relationship between the drainage network and slope instabilities, and models for rockfall trajectory analyses. The paper also provides a methodology that can be implemented on other slope instabilities to support the decision-making process to define mitigation actions that are practical and minimize associated risks.

中文翻译：

---

用于监测、调查和缓解设计的具有多种破坏机制的岩石边坡的无人机——案例研究

运输走廊附近的斜坡不稳定性需要及时和准确的评估，以确定道路使用者面临的风险，特别是当天气变化引发这些不稳定性时。在加拿大艾伯塔省南部，靠近 Drumheller 镇，毗邻 837 号高速公路的 500 米长、60 米高的斜坡有斜坡不稳定性的历史，包括落石、冻土坠落和泥石流。斜坡故障堵塞了道路，增加了用户和维护成本。由于不安全的条件和斜坡的陡度（1H:1V 倾斜度），只能从道路上对斜坡情况进行目视评估。无人机 (UAV) 技术的进步为收集斜坡状况的详细摄影记录提供了一种快速而安全的工具。无人机数据和摄影测量方法的结合使工程师能够远程、安全、快速地对斜坡不稳定性进行精确评估。该论文展示了使用无人机衍生数据来评估以下内容： 实践中的关键不稳定区域；不稳定事件的严重程度；排水管网与边坡不稳定性之间的关系，以及落石轨迹分析模型。该文件还提供了一种可以在其他斜坡不稳定性上实施的方法，以支持决策过程，以定义切实可行的缓解措施并将相关风险降至最低。实践中的关键不稳定区域；不稳定事件的严重程度；排水管网与边坡不稳定性之间的关系，以及落石轨迹分析模型。该文件还提供了一种可以在其他斜坡不稳定性上实施的方法，以支持决策过程，以定义切实可行的缓解措施并将相关风险降至最低。实践中的关键不稳定区域；不稳定事件的严重程度；排水管网与边坡不稳定性之间的关系，以及落石轨迹分析模型。该文件还提供了一种可以在其他斜坡不稳定性上实施的方法，以支持决策过程，以定义切实可行的缓解措施并将相关风险降至最低。