Adam Łajczak

The New Features of Landslide Relief Discovered Using Lidar – Case Study from Babia Góra Massif, Western Carpathian Mountains

Abstract Basing on LiDAR data, the re-interpretation of the limit and distribution of the selected landslide forms in 9 test areas were carried out. The forms are located at the slopes of the monoclinal ridge of Babia Góra Mt. (1,725 m a.s.l.) in the flysch Western Carpathians. The earlier knowledge on these landforms is shown in the unpublished map at the scale of 1:5,000 which was prepared basing on geomorphological mapping. Basing on the newest information source, subtle geomorphic signatures of landslides were found, the dynamics of these forms and directions of their further development were determined. Local differentiation of deep-seated landslides was indicated according to the relation between the sandstone layer dip and slope inclination, slope length, and altitude of the location of headwaters. An attention was paid to polycyclic relief of the highest located landslide forms, which contain the elements of glacial and nival morphology, and some are modelled by debris flows.

Development of Tourist Infrastructure on Babia Góra Mt. (Western Carpathians) in Conditions where There is Risk Due to Slope Processes

The aim of the paper is to evaluate the sustainability of the location of all elements of tourist infrastructure on the slopes of Babia Gora Mt. in the Western Beskidy Mountains taking into account local relief and a range of geomorphologic processes. For more than 130 years, local tourist facilities remained unthreatened by slope processes with the exception of very limited sections of the northern slope. A deep-seated landslide reactivated in the mid 19th century affected a small section of that slope that is outside of regular tourist traffic while another landslide, a shallow one that remains active, has been damaging a single marked tourist trail. Debris flows observed locally on the northern slope are not typical of contemporary relief dynamics across Babia Gora Mt. and therefore cannot be regarded as a universal threat to local tourist infrastructure. In addition, snow avalanches that reach short stretches of tourist trails on the northern slope have not damaged them. The current hazard status of the tourist infrastructure on Babia Gora Mt. is clearly better than it would have been if certain heavy development plans had been carried out in geomorphologically vulnerable areas.

Relief development of the Babia Góra massif, Western Carpathian Mountains

Abstract The paper discusses structural considerations relating to landform development on Mt. Babia Góra (1,725 m a.s.l.), the highest massif in the flysch section of the Western Carpathian Mountains. The Babia Góra massif consists of folded Palaeogene-age sediments, including resistant Magura sandstone and less resistant sub-Magura layers, with numerous tectonic faults. The area has inverse-type geomorphology. The monoclinal ridge of the massif itself consists of the resistant Magura sandstone dipping southwards. Since the Miocene, the development of the massif’s relief has involved a number of processes, including: tectonic uplifting, removal of a thick layer of rocks, exposure of sub-Magura layers over a large area, the staged development of valleys dissecting the pediments surrounding the ever higher ridge, and slope retreat due to deep landsliding. Axes of linear terrain forms, escarpments of landslide scars and of headwater areas follow two main intersecting fracture lines present within the massif. Large quantities of colluvial material are transported away from the massif along these lines. The development of the land relief has led to the elongation of slopes as local elevation differences increased. Landsliding has developed in an uphill direction, which means that the youngest relief is observed on the highest sections of steep slopes. The development of the massif’s northern slope, which has formed a high and precipitous cuesta, began to accelerate only after a nearly complete exposure of the sub-Magura layers at its foot. Following this exposure the profile of the massif’s N-S cross-section has begun to become asymmetrical. With time, the degree of general remodelling of the massif has tended to decrease. As a result, the geomorphological contrast between the northern and southern sides of the massif has become well established. The description of the probable development of the Babia Góra relief is based on the author’s fieldwork, an analysis of geological maps and aerial photos, and on literature.