The Role of Geomorphic Parameters on Sediment Yield Semi-Arid

One of the factors that cause change and transformation in different parts of the Earth have been the phenomenon of erosion. South Central Alborz Green River Hablerood areas between 53 ° 52 12degrees up 9 minutes and 35 degrees East longitude and 17 minutes to 35 degrees north latitude and 58 minutes. With a rain Simulator device type comforts with intensify 4 minute precipitation in three repeat. With the continuation of the domain. The amount of runoff, sediment and units lithology to collect bottles and samples for weighing the amount of sediment and runoff, soil conservation and watershed management research institute. Map of the potential production of special deposits for the entire basin. Then create special deposition map using GIS software with the intersection of the command in the sub basin map in geographic information system environment, fitted. The number of 15 parameter were studied that Morphometric and environmental grain on erosion and sedimentation, and has been selected. Shown and 0.738 after full implementation in the 10models. this is the coefficient increased 0.820 show dented this entry is that the slope, vegetation, environment and units lithology the most impact in the shows continue, the results showed that a significant level of regressive model No.1 has been sig = 0.017 but retrograde 10-level model 95 percent with a significant sig = 0.000. In the results, standard coefficients (Beta) and the level of being meaningful, the model shown in the first stage run slope, vegetation and lithology variables with coefficients. 340, 065 096 ... and all the variables entered into the models between the detected which suggests the importance of these parameters.After the implementation of the model at the stage of being a significant witness 10 slope, basin environment variables, Po six vegetable and lithology the coefficient of the resultant islets. 825,-450,-.-643.