Threshold of Acanthus Harvesting to Sediment Produce

Harvesting of self-growing plants, like acanthus; from the down slopes of mountainous regions often causes disturbances to the appearance of the slopes if it is mowed intensively. These soil disturbances often occur with spring showers that accelerate soil erosion. On the other hand, the harvesting is inevitable because of acanthus clinical and sustenance uses and earning a livelihood for many local people who make a living with such crop in the harvesting seasons. So, as the spring season starts, the harvest of self growing plants becomes a usual phenomenon on the slopes in lower altitudes. The harvest of rooting plants as acanthus is in a way that makes pits on the ground and this may be agent of erosion when spring rain falls; specially, precipitation contact with plant germination in Iran. So, in this study, it has been tried to elucidate if the harvesting of acanthus makes erosion at every situation or reaching to erosion threshold needs to increase number of the harvesting in area unit as well as other location with more gradient and other characteristics. Research Methodology In this survey has been taken into consideration the sediment producing in 16 plots with and without acanthus in the Viece Mountain, near Kermanshah city. Whereas, gradients and orientation are factors that play roles on erosion, in this research too, others aims purpose to study roles of acanthus harvesting on the different gradients and orientations on erosion acceleration. In this reason, these plots established on the four different slopes and two different aspects. The amount of sediment has been measured from plots in 9 time precipitation when it falls on late winter and early spring in 2007. Factor analyze and two ways ANOVA were the techniques that used for data analyzing.