Q- The average rainfall for a 3 hour duration storm is 2.7 cm and the loss rate is 0.3 cm/hr. The flood hydrograph has a base flow of 20 m³/s and produces a peak flow of 220 m³/s. Find the peak of a 3-h unit hydrograph.

Q: stream with a flowrate of 10 m3/min and an MTBE concentration of 5 g/m3 flows into the first…

A: Inflow rate = Inflow concentration = Reservoir volume (V) = Time (t) = 1 hour = 60 minutes

Q: The daily record of rainfall over a catchment area is 0.2 million cubic meters. It has been found…

A: Given: Total rainfall over the catchment (QR) = 0.2 million cubic meter. QR = 0.2 x 106 m3 The head…

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

A:

Q: A spillway discharges a flood flow at a rate of 7.2 m³/s per meter width of channel. At the…

A: Given:- Discharge,q= 7.2 m3/s  Depth of flow= y1= 0.6 m

Q: Direction: One hour triangular unit hydrograph of a watershed has the peak discharge of 60 m³/sec.cm…

A: Peak discharge = 60 m3/sec.cm Duration = 10 hrs. Time base 30 hrs. f index = 0.4 cm per hrs. Base…

Q: An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m³/s. The flood…

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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: An urban park has a drainage basin area of 398 ac. The 25-year rainfall event has a precipitation…

A: Given data: C=0.75 Average rainfall intensity, I=2.382 in. /h Drainage area, A=398 ac.

Q: Given a circular clarifier that is 96 feet in diameter with a sidewall water depth of 8.5 feet and a…

A: (1) Diameter of the circular clarifier(2) Sidewall water depth     (3) Average flow discharge of the…

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: (i) A catchment experiences a 2-hour duration isolated storm and the peak of the flood hydrograph…

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Q: A direct-runoff hydrograph due to an isolated storm was triangular in shape with a base of 60h and a…

A: Base = 60 hrPeak = 100 m3/secCatchment area = 500 km2To Find :The effective rainfall of the storm ?

Q: A catchment having an area of 150 km2 has the ø index 0.3 cm/hr. The base flow at the 3 outlet is…

A: Given -Area = 150 km2Index = 0.3 cm/hr.Base flow = 10 m3/sBase time = 20 hrs.The peak ordinate time…

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.