Terrain visibility impact on the preparation of landslide inventories: some practical cases
Terrain visibility impact on the preparation of landslide inventories: some practical cases
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DOI：
10.5194/nhess-2021-334
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发表时间：
2021-11
期刊：
影响因子：
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通讯作者：
T. Bornaetxea;I. Marchesini;Sumit Kumar;Rabisankar Karmakar;A. Mondini
中科院分区：
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作者：
T. Bornaetxea;I. Marchesini;Sumit Kumar;Rabisankar Karmakar;A. Mondini
摘要。滑坡清单有多种用途，包括景观特征和监测、滑坡易感性、危害和风险评估。它们的质量取决于生成它们的数据和方法。在这项工作中，我们评估了在两个研究区域使用不同方法编制的四个滑坡清单所收集的信息的空间分布对领土地图的可变可见性的影响。该方法首先从用于绘制滑坡地图的路径（道路）中对不同能见度等级区域的领土进行分类，然后将清单中报告的滑坡密度估计为不同的能见度等级。我们的研究结果表明，1)信息密度与通过实地调查、技术报告和/或报纸获得的清单中的能见度密切相关，其中山体滑坡在低能见度类别中采样不足；2)通过图像解译获得的清单存在明显的道路或基础设施附近的小滑坡。我们认为，所提出的程序可以用于评估滑坡清单的质量，然后正确定位其使用。
Abstract. Landslide inventories are used for multiple purposes including landscape characterisation and monitoring, and landslide susceptibility, hazard and risk evaluation. Their quality can depend on the data and the methods with which they were produced. In this work we evaluate the effects of a variable visibility of the territory to map on the spatial distribution of the information collected by four landslide inventories prepared using different approaches in two study areas. The method first classifies the territory in areas with different visibility levels from the paths (roads) used to map landslides, and then estimates the landslide density reported in the inventories into the different visibility classes. Our results show that 1) the density of the information is strongly related to the visibility in inventories obtained through fieldwork, technical reports and/or newspapers, where landslides are under-sampled in low visibility classes; and 2) the inventories obtained by photo-interpretation of images suffer from a marked under representation of small landslides close to roads or infrastructures. We maintain that the proposed procedure can be useful to evaluate the quality of landslide inventories and then properly orient their use.