Ecological stability and soil degradation are the main driving elements associated with climate change in terms of their strong impact on reducing or increasing the acceleration of climate change. Many studies have been devoted to examining the development of the ecological stability of a selected locality as well as assessing the intensity of erosion processes, but studies dealing with the relationship and connections between the development of ecological stability and the intensity of erosion are insufficient. Analyses of ecological stability and assessments of soil water erosion were performed for a catchment located in the Slovak Republic covering the years 1990, 2006, 2012, and 2018. The assessment of ecological stability was performed using several methods according to various approaches. The soil water erosion was derived using long-term simulations in an erosion model. A precipitation input data model was derived based on the Community Land Model (the CLM model). The aim of the article is to determine the relationship and connections between the ecological stability of the selected area and the intensity of its soil water erosion. The study also points to assessing changes in the development of ecological stability during the period selected together with changes in the intensity of the soil water erosion.