| چکیده انگلیسی مقاله |
Vegetation has always played an important role in preserving the soil and preventing its erosion. Density and type of vegetation are influential factors in the amount of runoff and sediment created in an area. Accordingly, this study was conducted on the effect of vegetative form of plants on runoff and sediment production in mountain pastures in Assadabad region. Using rain simulator in two types of grassland and shrub land, plots with dimensions of 1*1 are installed in the area and rainfall with three time intervals of 2, 4 and 6 minutes in both types of vegetation (grassland and shrub land) and It was created at densities of 20, 30, 40, 70, 80 and 90% and the runoff and sediment produced from each plot were accurately measured. The results showed that the grasslands is much more effective than the shrub lands in controlling runoff and sediment. Also, the average runoff production in both types of vegetation increased with increasing rainfall duration, and the amount of sediment in the shrub type acted inversely with increasing rainfall, and the amount of sediment decreased. In Grassland type, the amount of sediment production increased exponentially with increasing rainfall interval and then increased. |
