During the past few years, erosion and shrinkage processes were recorded on the territory of the protected zone Tatranská Javorina. These processes were occurring in mostly disintegrated or in the stands attacked and damaged by the barked insect or in their neighborhood. The purpose of this thesis was to process actual findings about the ground erosion and about the anti-erosion function of the forest ecosystems, to set up an experiment for determination and comparison of the ground erosion intensity and the surface outfall and to spatially evaluate a superficial range and a year-on dynamic of the landslides. The experiment was set up on three research areas and measuring devices were installed always on the free area next to the damaged areas and in still undamaged adjacent forest stands. On all three areas, the overall higher erosion was recorded on the free area compared to the forest stands on average of 2.8 times. The higher surface outfall on the free area was proved only on two of three areas compared to the forest, but overall it was 1.3 times higher. On the free area, there were 375.2 mm of rainfall recorded over 2 and half months, of which under-tree-top rainfalls represented 57 %. The maximal hourly rainfall on the free area was 20.2 mm. In addition to the evaluation of erosion, the spatial evaluation of the occurrence and dynamics of the aerial imagery of the surveyed area for 2012 and 2015 was also carried out. On the aerial photos, 12 significant landslides were identified from the area point of view. The total area of landslides 1.12 ha were detected by GIS measurements from aerial photos. In conclusion, measures were proposed to improve the current state and possible stabilization of damaged areas based on assessment of the state and extent of erosion and translocation processes.