In order to identify the causes of landslide development in the area of Rożnów Lake (Outer Carpathians – southern Poland) in the last decade, Differential Digital Terrain Models (DDM) were used. These were made on the basis of Airborne Laser Scanning (ALS) data from four flights. The first ALS data are from 2010, before the event in Poland known as the “landslide catastrophe”. Comparing digital terrain models from different years tracking of changes in landslide activity relative to the intensity of precipitation. The article presents a method of investigating landslides with the use of DDM. This analysis allowed calculation of the displacement lithological index and of landslide susceptibility, based only on landslides that have become active in the last decade. The areas with the highest susceptibility to landslides are regions of Hieroglyphic Beds occurrence and of tectonic overthrusts. An important role in the development of landslides in the area of Rożnów Lake is also played by the thick-bedded Ciężkowice sandstones (usually associated with low susceptibility to landslides). After the “landslide catastrophe”, it is precisely in these formations that the greatest displacements and more frequent widening of the landslide boundaries were recorded, though they are generally stable during smaller rainfall.

为了确定过去十年中 Rożnów 湖（外喀尔巴阡山脉 - 波兰南部）地区滑坡发展的原因，使用了差分数字地形模型 (DDM)。这些是根据四次飞行的机载激光扫描 (ALS) 数据制作的。第一个 ALS 数据来自 2010 年，当时波兰发生了被称为“山体滑坡灾难”的事件。比较不同年份的数字地形模型，跟踪滑坡活动相对于降水强度的变化。本文介绍了一种使用 DDM 调查滑坡的方法。这种分析允许计算位移岩性指数和滑坡敏感性，仅基于在过去十年中变得活跃的滑坡。最易发生滑坡的地区是象形床产区和构造逆冲断层区。厚层 Ciężkowice 砂岩（通常与滑坡敏感性低有关）在 Rożnów 湖地区滑坡的发展中也发挥了重要作用。在“滑坡灾难”之后，正是在这些地层中记录了最大的位移和更频繁的滑坡边界加宽，尽管它们在较小的降雨期间通常是稳定的。