An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m³/s. The flood hydrograph has a base flow of 20 m³/s. If the spatial average rainfall in the watershed for the duration of storm is 2 cm and the average loss rate is 0.4 cm/hour, the peak of 2-hour unit hydrograph (in m³/s - cm, up to one decimal place) is

Q: The peak of flood hydrograph due to a 3-h duration isolated storm in a catchment is 300 m3/s. The…

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Q: A storm with a uniform depth of 1 in. falls on a 25-acre watershed. Determine the total volume of…

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Q: The peak flow of a flood hydrograph caused by an isolated storm was observed to be 100 m³/s. The…

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Q: The return period for the annual maximum flood of a given magnitude is 8 years. The probability that…

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Unit Hydrograph

Hydrology is the science which deals with the study of water on the earth’s surface. The word Hydrograph is derived from the word hydro which means water. Hydrograph is basically a graph in which the discharge is plotted against the time interval at a specific point in a river or other channel. In a hydrograph, the discharge is plotted along the y-axis and time interval is plotted along the x-axis. Hydrograph is used to estimate the runoff. The variations in discharges with the change in time is shown by a hydrograph. It was revealed that the total discharge at an outlet increases with time by a kinematic wave model.