Abstract:
The paper contains data about the destructive effects of gully erosion on the environment. Provides general information about the gully erosion in several countries around the world including Romania and is considered a case study for a river basin located Semenic Mountains (Bârzava drainage area). For modeling of erosion processes on slopes and beds of Bârzava river sub-basin was used modeling program WEPP (Water Erosion Prediction Project). The case study is based on the following assumptions: the presence of different types of soil, constant rain intensity over the entire river sub-basins, land use is the same all over sub-basins; there aren’t soil erosion control works. Model was applied to each area of bed (gully), by calculating the quantity of soil lost depending on soil type. Sub-basin divided into sub-basins corresponding to the beds sectors taking into account the direction of water flow. Are noted sub-basins with H and river beds with C (river beds sectors). Each C is corresponding to one H. (Figure 1) Data entered in the program are: the use of land - forests, climate - the average monthly temperature and precipitation, soil characteristics, sub-basins areas, river beds characteristics: average width of the river bed and river bed type (channel river bed in the forest area).
