ABSTRACT
ABSTRACT: Dam reservoirs are confronted with two fundamental problems. The first is the master of floods and the second is related to the loss of storage capacity due to the silting of the reservoir. One possible solution to these problems is to raise the sill level of the existing weir by its renovation in PK-Weir. The PK-Weir is built across the rivers and on dams where the limitation of discharge or water
level must be ensured in normal or submerged flow conditions. Various studies and researches carried out on the PK-Weir have focused only in the normal flow conditions. The present paper presents a study on the effect of the downstream level on the performance of the PK-Weir. This study will be based primarily on model experiments and following on the approaches of
other authors for rectilinear or labyrinth weirs submerged from downstream.
