All the inclined parts of the Earth's surface are called slopes. These parts are under the constant action of exogenous processes, which justtifies their constant modeling. According to the shape, the slopes can be convex (bulging) and concave (sunk), normal, oblique and steep (if the slope is greater than 55). Derasion is the collective name for all the destructive processes that take place on the slopes. There are three groups of slope processes. Gravitational movements tha include collapsing, shedding and rock avalanches, then the processes of creep and flow od soil, and the processes of leaching and dredging. Slope processes most often result in landslides. The sliding surface can have a different shape depending on the characteristics of the rocks in which the mass has move down the slope. Changes in the shape f the relief occur due to the action of running water, rain, sea waves, snow, frost, wind, vegetation and organisms, man ass well as temperature differences. Since these phenomena are of an every day nature, it is necessary to invstigate, monitor, act preventively, plan, build and, if necessary, carry out their rehabilitaton.