Investigation of Relationship between Landslide Zones with Sediment Yeild in Safarood Catchment
2010
Shadfar, Samad | Sharifi, Esmaiel | Tabatabae, Mahmudreza
In this research, At first, for Investigation of relationship between landslide and sediment yield with use of field survey, local interview and review ending studies, was recognized some of effective factors on landslide in the watershed. These factors are lithology, slope, distance from fault, aspect and distance from drainage network. After recognition, these factors have been processed using Ilwis and Arc GIS softwares. With regard to landslides importance in soil erosion and land destroying result was done landslide zonation with Index overlay and density area methods. Assesment of methods was done with Quality sum. In after phase, catchment divided in to different subcatchments. Hydrophysical Factors, such as Hydrological, Area , topography, capability of erosion, vegetation cover and rainfall were evaluated in each sub catchments. Then, the sediment yield in each of them were determined. Finally, occurance rate of landslide investigated in sediment yield zones. Results showed that density area method is more suitable for landslide hazard zonation. On the other hand, about79% of landslides was occurred in high and very high sediment yield zones.
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