Factors Affecting Design of a Barrage

Factors affecting the Design of Barrage are as follows: Estimation of Design Flood Hydraulic Units Width of Barrage Afflux Tail Water Rating Curve Crest Levels Discharges through a Barrage (Free Flow Conditions) Discharge through a Barrage (Submerged Flow Conditions) Fane's Curve Gibson's Curve

What is Barrage and What are the Basic Components of Barrage

The only difference between a weir and a barrage is of gates, that is the flow in barrage is regulated by gates and that in weirs, by its crest height. Barrages are costlier than weirs. Weirs and barrages are constructed mostly in plain areas. The heading up of water is affected by gates put across the river. The crest level in the barrage (top of solid obstruction) is kept at

Causes of failure of Weirs & their Remedies

Common causes of failure of weirs include: Excessive and progressive downstream erosion, both from within the stream and through lateral erosion of the banks Erosion of inadequately protected abutments

Site Selection for Barrage

When the angle between the headwork axis and the river axis exceeds 10°, the problem arises of concentration of flow on one side and island formation due to heavy silting within the guide bank on the other side. If the river axis is to the right of headwork axis, the concentration of flow is generally generally on the left side with consequent tendency to form an island