Simulation of sediment distribution in Kowsar dam using sediment distribution pattern of Dez dam

Kowsar dam is located on Khayrabad river, 60 km north-west of Dogonbadan, Kohgiloyeh and Boyerahmad province. Operation of this multi-purpose storage dam was started in 2003. Due to similarity of reservoir coefficient (0.41) of Kowar dam and Dez dam (located in Khuzestan province), three sediment measurements in 1983, 1997 and 2003 for Dez reservoir, and location of these two dams in Persian-Gulf watershed, the sediment distribution of Dez reservoir was used to predict sediment distribution pattern for Kowsar dam. The budget of sediments entering Kowsar reservoir is estimated as 475,000 m3/year and reservoir sediment distribution is predicted for 200-year periods for Kowsar dam. The results showed that when sedimentation rate becomes constant, the reservoir coefficient reaches a constant value of 0.59. About 632 years after the operation of Kowsar dam, sediments will reach turnouts level. Also, this dam will become full of sediments after 1437 years of operation.