The observed stream flow and rainfall data are tabulated below. The catchment area is 282.6 km2. Using the straight line method for base flow separation. 1pm 2pm 3pm 4pm 5pm " Time from start of rainfall (hr) Observed Hydrograph (m3/s) 150 150 350 800 1200 Time (hr) Observed Rainfall (cm/hr) i. ii. iii. iv. 1am-2am 0.25 6pm 7pm 8pm 9pm 10pm 11pm 12pm 900 750 550 350 225 Estimate the volume of direct runoff. Determine the excess rainfall (Effective Rainfall). Determine Ø-index. Determine lag time. 2am-3am 2.75 3am-4am 2.75 150 150 4am-5am 0.25

Q: Please solve correctly

A: Step 1:Explanation: For the given time step of 2 hours, the inflow into the reservoir is 180 cfs.The…

Q: Q3: A river catchment has a 2.0 hour unit hydrograph with the ordinates 0,3,11,35,55,66,63,40,22,9…

A:

Q: The ordinates of the hyetograph of a 6-hr duration rainfall is given below. If the direct runoff is…

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A: It is required to find the flood hydrograph from the resulting DRH.

Q: 3. For a 2 hour, 8 mm/h intensity rainfall, the hydrograph given in Table is observed. The area of…

A: time (hr)024681012141618202224flow rate(m3/sec)81814304538282418141088The area of watershed = 500…

Q: Q2- A cumulative runoff depth 33mm , determine Ø - index and estimate volume of infiltration in…

A:

Q: A gage on a small (1-acre) urban parking lot recorded the following incremental rainfall data. 1.5 2…

A:

Q: Time 1 123 4 5 6 7 8 9 10 11 12 Runoff (cfs) 130 170 300 600 696 727 602 512 315 210 90 60 Base flow…

A: TimeRunoff (cfs)Base flow (cfs)DRH ordinates(cfs)1 hr UH(i)1 hr UHlagged by 1 hr(ii)sum of (i) &…

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A: Consider the following table given below:

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.