Abstract
The sediments resulting from the erosion of basins lead to the squandering of the soil, reduction of its infertility and decreasing of the quality of the water, and that is why the lifespan of the dams would be endangered because of the accumulation of the sediments. The goal of this research is to estimate erosion and sediment yield in Sangcharak basin by Erosion Potential Method (EPM), using GIS. For the purposes of quantifying the erosion intensity change has been done with the soil erosion maps from 2005 and recent state of erosion in 2014. Result of this paper showed that specific annual gross erosion on the Sangcharak territory was 775.34 (m³.km−2.y−1) in 2005 while in 2014 it was 914.24 (m³.km−2.y−1). Therefore, due to changes in intensity of erosion processes the specific annual gross erosion in catchment areas was increased by 138.89 (m³.km−2.y−1). Specific sediment yield in this area was 300.18 (m³.km−2.y−1) in 2005, while in 2014 was 349.01 (m³.km−2.y−1).
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