Stability and runoff conditions in coarse grained sediments are depending mainly on topography, soil properties, groundwater conditions and vegetation type and cover. Landslides and debris flow may be triggered by for instance heavy or long duration of precipitation or by changes in the vegetation cover. It has been observed for several years that different forest activities like clear cutting and tracks from forest machines, building of forest roads, soil scarification, ditching and other activities changing run off conditions have caused severe erosion, landslides and debris flows affecting roads and buildings. Erosion due to forest activities may also lead to negative influences on water quality in streams and rivers. A methodology for general identification of slope areas which have prerequisites for landslides and/or debris flow and thereby are sensitive to changes in vegetation cover has been developed. The basis for the methodology is different layers in a geographical information system, such as slope inclination, length of slope, soil type, gully formations, water courses, type of vegetation cover and consequences (within a given distance). Criteria for these different layers are given and combined into a sensitivity map. The intention is to produce a map easy to understand also by non-scientists. The methodology has been tested in two areas in Sweden. Changes in vegetation cover have been done in the areas in connection with clear cutting and exploitation for ski resorts. By using the methodology, slopes and gullies have been identified as sensitive to changes in vegetation cover. The methodology and the results from the tests are presented in the paper.