CONSIDERATIONS CONCERNING TYPES OF RAVINE FROM UNGURAÅž HILLS AND FIZEÅž PLAIN

To sum up, talking about ravines implies first of all a stop upon what water erosion means. That’s why it’s important to point out that water erosion is a comlex phenomena that affects the soil cover from the Transylvanian Plain and is triggered by a number of changes that act both in time and in space. Water erosion, as well as surface drain and water infiltration on the soil’s profile is mainly due to the intensity of the rain, the nature of soils and the vegetation coverage. This study’s aim is to assess the types of existing ravines in Northern and North-Western Transylvanian Plain, by taking into consideration the water erosion’s effects. For the purpose of this research the ravine’s morphology, the soil’s texture and structure, as well as the hydraulic permeability and conductivity were analyzed. In conclusion, the evaluation of the current status of ravines from Unguraș Hills and Fizeș Plain have provided a series of observations regarding the typology of the existent ravines in these two regions. Field results revealed a strong correlation of the ravines’ formation processes with their control factors, especially with the use of the land, the slopes’ inclination degree, climate conditions and geological structure.