Effect of Diversion headwork

EFFECTS OF CONSTRUCTION OF DIVERSION HEADWORKS ON THE BEHAVIOUR OF RIVERS Following are the changes that take place in the behavior of the river after the construction of a diversion headworks. The silt carrying capacity of river is decreased because heading up of water causes flattening of the surface slope on the U/S side of the weir. Because of reduction in silt carrying capacity, the pond formed on U/S side starts silting. Because of silting on U/S side, the water passing D/S of the weir contains less amount of silt. To make up for the deficiency of the silt, the D/S flowing water starts scouring the bed and banks. The scouring may lead to undermining the stability of the weir. Because of silting of the pond, the afflux goes on increasing and thus more and more areas on U/S are submerged. At last, a stage is reached when no more…

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