The stream flows due to three successive storms of 3.7, 6 and 2.7 cm of 6-hours duration each on a basin are given below. The area of the basin is 4740 km2. Assuming a constant base flow of 8.5 m3 /s and ϕ-index of 0.25 cm/hour, derive a 6 hour unit hydrograph.

Q: In the table below annual rainfalls of gage A, B, C and D are given. Gage D was permanently…

A: The given data is shown below:

Q: 2. Find the intensity of rainfall in the Region 4, that has a return period of 50 years (Using…

A:

Q: Direction: A four hour unit hydrograph of a catchment is traingular in shape with base of 80 hours.…

A: 4 hour Unit Hydrograph triangular in shape Base=80 hours Area=720 km2 Base flow=30 m3/s Phi-index=1…

Q: Water depth in the Kankakee River was measured to be 5 ft. The width of the river is 1,000 ft and…

A: The given data is: River depth, d=5 ft River width, b=1000 ft The bed slope, S=0.0005

Q: A triangular irrigation lined canal carries a discharge of 25 m³/s at bed slope = 1/6000. If the…

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Q: Q45. A river discharges 2500 cumecs. The rugosity coefficient of the river bed is 0.028. If a mode…

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Q: A wide, clean-earth river has a flow rate q = 150 ft³/s per foot. (a) What is the critical depth, Yc…

A:

Q: 1. Estimate the peak flow rate assuming that the runoff coefficient is 0.4. 2. If the land use and…

A:

Q: 9. A river discharges into the sea at an estuary that can be considered a linear channel. The tidal…

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Q: A triangular irrigation lined canal carries a discharge of 25 m³/s at bed slope = 1/6000. If the…

A:

Q: A channel has a bottom width of 350 m, depth 9 m and side slopes 1:2. If the depth is increased to…

A: Percentage increase: It is defined as the difference of the two values to the original value which…

Q: Solve for the slope of the bottom of the channel shown below per kilometer length if the discharge…

A:

Q: For a catchment, the S-curve due to a rainfall intensity of 2 cm/hr is given by Q = 2 (2 - e-t)…

A: S-curve due to rainfall intensity of 2 cm/hr- Q=22-e-t where, t in hrs, & Q in m3/s.

Q: QUESTION 1 Use the kinematic wave formula to determine the time of concentration for a small…

A: Given Data -  Length of overland flow = 45.72 m  Average overland slope = 0.02 m/m Rainfall rate =…

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.