10 5 The total rainfall hyetograph of a storm, which took place over a basin is...
6. a) The hydrograph observed at the outlet of a basin of area 160 km2 is given in a table below. It is assumed that the rainfall intensity is constant at 50 mm/hr and the infiltration index is 10 mm/hr. Derive the unit hydrograph of a basin. t(min) 30 60 90 120 150 Q (m/s) 200 800 1400 800 200 200 0 b) Please calculate the total runoff hydrograph (with baseflow) if uniform rainfall depth 2cm occurs within an hour.
2.9 Storm data (Fig. P2-9) were recorded for a storm over a 205-acre basin on Sep- 9 tember 1, 1999. Approximations for the rainfall and runoff cumulative mass curves are shown by the black dashes in the figure. (a) Determine the duration and average intensity of the rainfall (b) What is the time to peak for this storm? (c) Find the φ index for this storm using the rainfall and hydrograph data. (d) Develop a UH for this watershed using...
A 6 hr storm produced rainfall intensities of 7, 18, 25, 12, 10 and 3 mm/hr in successive one hour 2 intervals over a basin of 800 Km . The resulting runoff is observed to be 2640 hectare-meters. Determine φ-index for the basin. A 6 hr storm produced rainfall intensities of 7, 18, 25, 12, 10 and 3 mm/hr in successive one hour 2 intervals over a basin of 800 Km . The resulting runoff is observed to be 2640...
Storm data were collected for a 810-acre basin. Approximations for the wadi-flow, rainfall and runoff cumulative mass curves are shown in the following figure. 5.00 500 485 4.75 450 445 4.50 4.25 4.00 425 Cumulated DRO -Cumulated gross rainfall Wadi-flow 400 3.75 3.50 350 3.25 315 3.00 295 300 2.75 Cumulated Gross rainfall and DRO in inches 2.50 250 Wadi flow (cfs) 2.25 215 2.00 200 1.75 1.50 155 150 140 1.25 1.00 100 90 0.75 75 0.50 55 50...
Please Hw2 question asap A rainfall with a duration of 3 hrs on a 73.6 Square mile (190.8 square km) catchment Resulted in the following Runoff hydrograph. US UHG SIUHG Runoff hydrograph And UHG for 3-hr Storm 0.0 529.5 706.0 0.0 689.3 919.1 2527.4 232 3676.2 41.0 2757.2 307 2205.7 1470.5 16.4 919.1 689.3 0.0 15 7.7 2824.0 15 24.6 21 1129.6 706.0 529.5 0.0 12178.5 ftA3/s 1.32E+08 32 20 15 7.7 0.0 30 0.0 345.0 mA3/s 3.73E+06 DRV> 73.7...
3 and 4 3. Discharge rates for a flood hydrograph passing the outlet of a 600-acre drainage basin is given below. The flood was produced by a uniform rainfall rate of 2.75 in/hr, which started at 9 am and ended abruptly at 11 am. Time (hr)Q (cfs) 8:00 AM100 9:00 AM100 10:00 AM 300 11:00 AM 500 12:00 PM 700 1:00 PM800 2:00 PM600 3:00 PM400 4:00 PM 300 5:00 PM 6:00 PM 100 7:00 PM100 200 a) At what...
Question 5 (20 points) Calculate and draw approximately the hydrograph resulting from the given hypothetical basin in the presence of the given total hyetograph. Note that the basin is impervious and evaporation is negligible. Runoff of each area arrives to the next in 1 hour. 2 km2 i(cm/hr) 3 km2 2 km2 1 km2 1 2 3 (hr) 4
2. A 10-minute unit hydrograph (UH) of a catchment is given in the table below. What is the catchment area? (5 marks) Time step (10 minutes) 1 2 3 4 Discharge (mº/{s.cm)) 8 18 30 10 For a storm partern given in the table below, determine and plot runoff hydrograph at a 5-minute interval using the above 10-minute UH. Determine the time of concentration of the catchment. Assume the o index value for the catchment to be 12 mm/hr, and...
QUESTION 6 The ordinates of a 3-hour unit hydrograph for a particular basin are given be-low. Determine the ordinates of the S-curve hydrograph and therefrom the ordinates of the 6-hour unit hydrograph. Time (hr) 3- hr UH m3/s 0 0 3 1.5 6 4.5 9 8.6 12 12.0 15 9.4 18 4.6 21 2.3 24 0.8 27 0
Hydrologic analysis of a watershed Problem2: The unit hydrograph is the direct runoff generated by 1 unit (I mm in this problem) of excess rainfall. The one-hour unit hydrograph of a watershed is given by: 4 Time (hour) -0.9 U0.4 U0.2 0.0 0.0 U-0.6 Unit hydrograph (m/s/mm) (a) The 100-year storm over the watershed has the following excess rainfall pulses: Fromt 0 to 1 hour, P45 mm From t I to 2 hours, P20 From t = 2 to 3...