Question

In reservoir with an uncontrolled spillway the peak of the plotted outflow hydrograph

• A. Lies outside the plotted inflow hydrograph.
• B. Lies on the recession limb of the plotted inflow hydrograph.
• C. Lies on the peak of the inflow hydrograph.
• D. is higher than peak of the plotted inflow hydrograph.

Answer 1

The correct option is B Lies on the recession limb of the plotted inflow hydrograph.

When outflow from a reservoir is uncontrolled as in freely operating spillways, the peak in outflow hydrograph will occur at the point of intersection of the inflow and outflow or at the recession limbs of the inflow hydrograph