Flood routing is a process with the help of which characteristics of hydrograph of a flood, entering the reservoir are completely change when it emerges out of the reservoir.
The change in flood hydrograph characteristics takes place because certain volume of flood is store in the reservoir temporarily.
The base of the modified hydrograph, which emerges from the reservoirs becomes wider and its penk gets reduced.
The extent by which the inflow hydrograph gets changed due to reservoir storage can be computed by a process.
It is an important technique with the help of which solution of a flood control problem is arrived at.
In flood routing problem one has to calculate water levels in the reservoir, the storage quantities and outflow rates.
It is used to determine the level upto which water may rise during floods and also the rate of the discharge in the down stream channel when a particular flood passes through it.
