One hour triangular unit hydrograph of a watershed has the peak discharge of 60 m^3/sec. cm at 10 hours and time base of 30 hours. The  index is 0.40 cm per hour and base flow is 15 m^3/sec. (i) Compute the catchment area of the watershed in km^2. (ii) Compute the ordinate of the flood hydrograph at 15th hour, If the rainfall is 5.4 cm. in 1 hour.

Q: Question 3 A unit hydrograph for a watershed is triangular in shape with base period of 20 hours.…

A: Base period -T=20 hrsarea -A=500 ha=500×104 m2

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A: The Storage-Indication method is generally a level pool routing method for determining the outflow…

Q: b) A 4-hour rain of an amount of 1 cm (i.e intensity of 1/4 cm/hr) falls over a catchment shown in…

A: The objective of the question is to determine the flow hydrograph at site 0 using the time-area…

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: 4. Given the inlet below, with h=0.5 ft, W=1.5 ft, L=4.0 ft, and a gutter depression depth=0.33 ft,…

A: The value of "h" = 0.5 ft The value of "W" = 1.5 ft The value of "L" = 4 ft The gutter depression…

Q: roblem I: Figure 1 shows the flow hydrograph from a storm at the watershed outlet. Label the: (1)…

A:

Q: Given the drainage area in above Figure calculate the discharge at the outfall using the rational…

A:

Q: The peak of flood hydrograph due to a 3-hr duration of isolated storm in a catchment is 270 m³/s.…

A: 1. Peak of flood hydrograph: 2. Duration of isolated storm: 3 hours3. Total depth of rainfall: 6…

Q: 2.2 cm of runoff results from a storm that lasted 24 hours over an area of 195.0 km². Assume all the…

A:

Q: In a year, a 120 cm of rainfall received by a watershed with an area of 140 km2. The flow in the…

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Q: 2. A 6-ac basin is to be developed into 2 ac of commercial development (C=0.95) and 4 ac of park…

A: The design flow refers to the maximum amount of wastewater generated by a dwelling or non-dwelling…

Q: Example 7. A catchment of 200 hectares area has rainfalls of 7.5 cm, 2.0 cm and 5.0 cm in three…

A: The calculation of DRH with the help of distribution curve:

Q: A river catehment has a 2.0 hour unit hydrograph with the ordinates 0,3,11,35,55,66,63,40,22,9 and 2…

A: We have to compute the hydrograph resulting from the two successive 2.0 hour periods of effective…

Q: An urban catchment has an area of 0.85 km². The slope of the catchment is 0.006 and the maximum…

A:

Q: Compute the diameter (cm) of the outfall required to drain storm water from the watershed described…

A: Given:-  rainfall intensity = 4 cm/hr, Average velocity of flow =1 m/s  Area 1: C=0.5, area=0.005…

Q: The surface runoff hydrograph after the base flow separation is called: * None of the these Direct…

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Q: A 4-hour storm occurs over an 80 km² watershed. The details of the catchment are as follows. Sub…

A: area km2 loss @ mm/hour 1sthour rainfall in mm hour 2ndhour rainfall in mm hour 3rd hour rainfall in…

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.