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EXPERIMENTAL INVESTIGATION ON MAKHOOL DAM STILLING BASIN

This research is an experimental investigation on the hydraulic performance of the combined hydraulic jump and plunge pool stilling basin operating under high head for Makhool Dam. Two series of tests are carried out; the first series are on the model as it is designed, while the second series are on a modified model by adding two rows of chute blocks. 
  (81) Experiments are performed on both models. The results indicated that for the first model the stilling basin length can be reduced and there is negative pressure at the beginning of the jump on the sloping apron with high turbulence and unstable water surface. After adding the chute blocks, the tests of the second model indicated that the stilling basin length can be reduced and all pressures are positive with reasonably stable water surface as well as lower turbulence. Therefore, chute blocks are recommended to be added