TABLE Q3(c)Time (days)Runoff (m³/s)3Time (days)Runoff (m³/s)18.1139.731044911215126.18131716141 Based on 14 days runoff data given in TABLE Q3(c), determine the unit hydrographfor the catchment if the area is 4500 km². Separate the baseflow by using appropriatemethod.

Introduction : A unit hydrograph is a direct runoff hydrograph produced by one unit (one inch or one…

Answered: Time (days) Runoff (m³/s) Runoff (m³/s)…

Engineering

Civil Engineering

Time (days) Runoff (m³/s) Runoff (m³/s) 11 Time (days) 1 3 8 3 9. 7 3 5 10 4 4 11 5 15 12 6 18 13 1 7 16 14 1

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The data from a stream gauging station during a measurement campaign are given below, compute the discharge in the river. Distance from left water edge 0 (m) Depth (m) Average velocity (m/sec) 0 1 1 1.0 0.25 3 2.6 0.35 5 3.1 0.5 7 2.5 0.45 9 0.9 0.3 10 lo 0 0
4-Calculate the amount of rain falling (storm water) on a water shed area, if you know the following: 1- Inlet time of flow = 6 min. 2- Travel (flow) time =7 min. 3- Runoff coefficient = 0.40 4- Water shed area = 10 ha.
WATER RESOURCES ENGINEERING A 6-hour storm event occured in the study basin. You were able to measure precipitiation and infiltration data, but not streamflow. Using the precipitation and and infiltration data and the unit hydrograph, estimate the total streamflow during and after this storm event. Calculate stream flow for each time step until the total streamflow is equal to the baseflow of 35 m3/s. Please refer to attached images of data tables:
Question 03 In a given year, a catchment with an area of 9536 km? received 1.3 m of precipitation. The average rate of flow measured in a river draining the catchment was 30 m³s1. a. How much total river runoff occurred in the year (in m³)? b. What is the runoff coefficient? c. How much water is lost due to the combined effects of evaporation, transpiration, and infiltration. (Express in m).
Problem 3 The table below contains the data for a one-hour unit hydrograph. Time Q (hr) (cfs/in) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 145 246 359 979 432 246 134 65 32 0 (a) Determine the area of the watershed to which this unit hydrograph corresponds. Report your answer in acres. (b) Assume a very intense 3-hour storm occurs shortly after a rainy period, so the ground is very saturated. The runoff from the first one-hour interval of the storm totals 0.5 in., the runoff from the second one-hour interval is 2.5 in, and the runoff from the third one-hour interval totals 1.7 in. The baseflow during and after the storm is 80 cfs. Derive the storm hydrograph for this 3-hour storm. table that clearly indicates how you used the unit hydrograph, sample calculations Provide a with sufficient explanation, explanatory sketches, and a graph of the storm hydrograph. (c) Determine the peak discharge that will occur in the river if this 3-hour storm occurs.
Derive and plot 3-hour Unit hydrograph for a stream which drains an area of around (401) km2. Time-discharge data of the storm is given is in Table. Assume the base flow as 2 m3 /sec. Time (Hrs.) 0 3 Flow (m³/s) 2 6 6 9 11 13 12 15 18 21 10 8 6 4 24 2
Separate the baseflow from the stream flow hydrograph using the straight-line method. What is the baseflow? Calculate the direct runoff hydrograph (DRH) and plot it as an x-y scatter plot. Time (hr) Discharge (cfs) 0.0 60 0.5 54 1.0 50 1.5 90 2.0 137 2.5 176 3.0 200 3.5 198 4.0 140 4.5 97 5.0 60 5.5 40 6.0 35 6.5 32 7.0 29 7.5 24 8.0 22 8.5 20 9.0 20 9.5 19 10.0 19 10.5 18 11.0 18 11.5 18 12.0 17
Problem 3. Given below are the daily mean flows in cubic meter per second at a gaging station for a period of 5 days. What is the mean flow rate for the period of cubic meters per second? What is the total discharge during the period in cubic meters? If the drainage area is 1958 km', what is the runoff volume in millimeters? Day 1 | 2 | 3 4 | 5 Flow, m'/s 19.8 135.9 87.8 57.2 37.1 Problem 4. Using the data of prob. 4-3, and relationship of Fig. 4-16, estimates the peak flow
Problem 2. A storm had 3 successive 6-hr intervals of rainfall magnitude of 3.0, 5.0 and 4.0 cm, respectively. Time from the beginning 0 3 6 9 12 18 24 30 36 48 54 60 66 42 of the storm (hr) 6-hr UH ordinates (cumecs) 0 150 250 450 600 800 700 600 450 320 200 100 50 0 a. Plot the resulting DRH due to 3 rainfall events, assuming a phi-index of 0.20 cm/hr. • Recall that the phi-index represents the rate of infiltration. • The hydrograph plots RUNOFF rates, where runoff = precipitation - losses. Note that the rainfall magnitude is reported as total rainfall depth in 6 hrs, so convert infiltration as a total for every 6 hr period. b. Assuming a baseflow of 30 m3/s, what are the ordinates of the storm hydrograph?
6.1. Given below are the ordinates of a 4hr UH of a basin at 1hr intervals: Time (hr) 0 1 2 3 5 6 7 8 9 10 11 12 13 14 15 16 17 4hr-UH 04 25 44 60 70 61 52 45 38 32 27 22 18 14 11 8 6 4 (m³/s) i) What is the area of the basin? ii) Derive the 2hr and 6hr UH? Ans. i)195.84km² ii) The ordinates of 2hr UH at 1hr intervals are (0,8,50,80,70,60,52,44,38,32,26,22,18,14,10,8,6,4, 2, and 0 m³/s. The ordinates of 6hr UH at 1hr intervals are: (0,2.7,16.7,29.3,40,49.3,57.3,61.3,53.3,45.3,38.7,32.7,27.3,22.7,18,14.7,11.3,8.7,6,4,2.7,1.3,0.7 and Om³/s). 3- 00 19 20 2 1 7 21 0
A double-mass curve is a graph of the cumulative catch at the rain gage of interest versus the cumulative catch of one or more gages in the regions that have been subjected to similar meteorological occurrences and are known to be consistent. The annual rainfalls of gage A,B, C and D are given in table below. Gage D was permanently relocated after a period of 3 years (at the end of 1988). Adjust the recorded values from 1986 through 1988 of gage D using double mass curve with the assumption that the other gages are consistent. Give your answers for the adjusted data in order (1986, 1987, 1988). Give your answers rounded off to the nearest hundredths. Submit your solution and the double - mass curve for both on the folder provided.
Example 4. Following are the ordinates of a storm hydrograph of a river draining a catchment area of 423 km² due to a 6-h isolated storm. Derive the ordinates o f a 6-h unit hydrograph for the catchment Time from start of storm (h) -6 0 6 12 18 24 30 36 42 48 Discharge (m³/s) 10 10 30 87.5 115.5 102.5 85.0 71.0 59.0 47.5 Time from start of storm (h) 54 60 66 72 78 84 90 96 102 Discharge (m³/s) 39.0 31.5 26.0 21.5 17.5 15.0 12.5 12.0 12.0