Analysis of the Earth Dams Function against the Effects of Long- Term Deposition in Reservoirs (Polrood Earth Dam- Guilan Province)

Estimation of sediment transport load due to erosion in river basins is one of the main issues which is essential for many projects related to water resources, soil and damps construction. In regards to the phenomenon of erosion and transmission sedimentation in rivers has always led to deformation in the seaboard and sedimentation. Therefore, the management and planning in bank of rivers is important in water and soil resources and damp construction. Hence, checking the flow capacity of the sediment transportation and the sediment transportation mechanism in the river hydraulics and their sedimentation in dams are always one of the most fundamental problems in dams construction, and consumable life of dams are also directly related to this phenomenon. To deals with this issue, in this research, after predicting the 57-year-old sediment, the effects of sediment on Polrood earth-filled dam has been investigated using FLAC3D software. The results show that the effective stress and displacement in the upstream shell are approximately equal to the state without applying sediment pressure.