TY - JOUR T1 - Effects of Land-use Management Scenarios on Soil Erosion Rate using GIS and USLE Model in Yamchi Dam Watershed, Ardabil TT - تأثیر سناریوهای مختلف مدیریت کاربری اراضی بر میزان فرسایش خاک با استفاده از مدل USLE و GIS در آبخیز سد یامچی اردبیل JF - JSTNAR JO - JSTNAR VL - 21 IS - 2 UR - http://jstnar.iut.ac.ir/article-1-3117-en.html Y1 - 2017 SP - 221 EP - 234 KW - Sediment yield KW - Soil conservation KW - Vegetation cover KW - Erosion modeling KW - Universal Soil Loss Equation. N2 - Effective soil conservation requires a framework modelling that can evaluate erosion for different land-use scenarios. The USLE model was used to predict the reaction of appropriate land-cover/land-use scenarios in reducing sediment yield at the upland watershed of Yamchi Dam (474 km2), West Ardabil Province, Iran. Beside existing scenario, seven other land-use management scenarios were determined considering pattern of land-use through study area within a GIS-framework. Then, data inputs were prepared using terrain data, land-use map and direct observations. According to the model results, the generated erosion amount was 3.92 t/ha/yr for the current land-use (baseline scenario). For this purpose, conservation practices in dry farming slopes and implementing the scenario 5 (contour farming and remaining crop residuals) can reduce the sediment to 2.02 t/ha/yr. The lowest and highest decreases in sediment yield are projected to be through implementation of scenario 6 (irrigated farming protection with plant residuals) and 7 (biological soil conservation in dry and irrigated farming). The results indicated that, implementing scenario frameworks and evaluating appropriate land-use management scenarios can lead to the reduction of sediment entering the reservoir, and prioritizing soil conservations in the studied area. M3 10.18869/acadpub.jstnar.21.2.221 ER -