SEDIMENT DIVERSION THROUGH IRRIGATION OUTLETS

To avoid sediment deposits in the downstream portion of irrigation channels, the outlets must extract a concentration equal to or higher than the one in the channel. In Pakistan, although channels have been designed in that way. the present management leads to a general deposition of sediments. A few concentration measurements and the use of a 3D model of one outlet suggest that the sediment discharge in the outlet is close to the one contained in the current tube entering the outlet. Finally, a simple model with one parameter is proposed to compute the sediment concentration in the outlet.