CONDICIONANTES: When we relate in them to the condicionantes of the erosive processes, we are speaking of the vectors that will go to unchain these processes. We can cite the exgenos factors climate with the direct performance of the water of rains gravity (/encostas relief steep), type of vegetal covering, erodibilidade of ground (or vulnerability of the same ones in suffering erosion) antrpica eao.

3. GROUND AND LANDSCAPES AS OPEN SYSTEMS the formation of ground is the result of the interaction of many processes, in such a way geomorfolgicos as> edficos. These processes portray a variability in such a way secular and space significant, being of this form it is important to approach ground as a dynamic system. Being thus, the ground and the landscapes must be considered open systems 1. The thickness of the ground goes to depend on the taxes of its removal and formation, that is, in the areas where the removal is minimum, deep ground go to develop themselves; where the erosive action will be more active, the ground will be less thick. In the geomorfologia this can well be understood as a resultant rocking of the denudation 2. In this direction WAR (2004) apud PALMIERI and LARACH (2000), summarizes the relations between ground and landscapes well, when they detach the paper that the relief exerts in the development of ground, with great influence in the hdricas conditions. A schematical drawing is followed – of well simple form – to exemplificar the influence of the relief in the erosion taxes and 3 intemperismo. Plainer areas tend the lesser taxes of erosion, in compensation, steeper areas provide to greaters denudation taxes. Schematical drawing of the erosion taxes and intemperismo: Figure 01: Erosion x Intemperismo 3.