When a dam is built on the river, due to the accumulation of water in the reservoir speed river of input and increasing area of water flow is suddenly reduced. This decreases the carrying capacity of river sediment entering the reservoir and thereby settling sediment load in the lake behind the dam. In other words, regime change, the river, the water storage reservoir behind the dam also is converted to sediment accumulation. This is especially in arid and semi-arid vegetation without appropriate and surface water, with soil erosion, formed the Muddy River. Reservoir sedimentation rate of many of our country's is most worrying than the rate prediction. Though, this paper provides a brief overview of the different methods, sedimentation tank, as an appropriate method to find out the amount of sediment yield.
