شبيه سازي يك بعدي انتقال رسوبات غيرچسبنده در سدهاي تاخيري پاره سنگي

Rockfill detention darns with no imperible layer in the core have been used to control flood recently. Flood flow usually bears high amount sediment. So the sediment penetrates in to the structures of these darns. This research has been done in an experimental flume by conducting a number of tests in a rectangular sample of an experimental rockfill darn with 600 mm length, 300 mm height and 300 mm width. The mean diameters of the rock were 14.5 and 21.5 mm. The sediment mean diameter were 0.256, 0.362 and 0.512 mm. Using the critical hydraulic gradient equation for laminar flow, another equation has been introduced for critical hydraulic gradient in turbulent flow. Thereby, in rockfill turbulent flow with using one dimensional model and sediment transport equation in laminar flow a model has been achieved for sediment transport. There is a good correlation between model prediction and result library observation.