1. (: :) Calculate the peak runoff, cfs, for a 10-year storm using the rational method located in Columbus Ohio Area=150 Acres Unimproved Area with 10% slope
Q: A rainfall excess of 2.1 cm in 1 hour produced a triangular runoff hydrograph with a peak of 20 m3/s…
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Q: a. Draw the hyetograph of this storm. b. Draw the standard infiltration curve (Using Horton's…
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Q: Using the SCS method, Determine the direct runoff volume. A= 7000ac y= 200 ft/mi CN= 75 L= 5 mi…
A: Given A=7000ac y=200ft/ml CN=75 L=5mi la=0.7 in Phi index=1.25 in/hr D=decide base in given…
Q: Q15. Storm drainage of an area of 0.15 km^2 will be based on rainfall of 10-year return period. The…
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Q: Q2.The mass curve of an isolated storm in a 500 ha watershed is as follows: Time from start (h) 0 2…
A: Given that:
Q: O. Determine the mean runoff flow in cfs from a drainage area of 175 acres using the English…
A: Inglis formula is a empirical formula Where A is area in km^2 Q discharge in m^3/sec
Q: A storm with 12 cm precipitation produced a direct surface runoff of 7.2 cm in the equivalent depth…
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Q: Calculate the runoff from a watershed of 0.01×R ha. The following data are available: Depth of…
A: To calculate runoff
Q: Question No. 04 Compute the following parameters for a storm with 60 cm of precipitation produced a…
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Q: The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the o-index for the…
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Q: Using the total storm rainfall depths given, determine the average rainfall over the watershed using…
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Q: A certain watershed in Region VIII with an area of 60 ha flat heavy soil is to be converted into a…
A: Given, Total Area= 60 ha Apartment dwelling area=40%=24 ha Business neighbourhood area=20%=12 ha…
Q: Rainfall of intensity of 20mm/h occurred over a watershed of area 100 ha for a duration of 6 h…
A: Given data : Duration (t)=6 hr Rainfall intensity =20 mm/hr Direct runoff volume=30000 m3
Q: Determine the weighted average runoff coefficient, C, and peak runoff rate for a 10-year storm of an…
A: We have to detemine the average runoff coefficient C, and peak runoff rate for 10 year storm…
Q: For the following rainfall rate, find the net runoff in cm, total rainfall and the value of W-index.…
A: Given- ϕ index=3
Q: Rainfall of magnitude 4 cm, 4 cm and 2 cm occurring on three consecutive 2-hrs durations on a…
A: Given Data Time in hrs. 0-2 2-4 4-6 P in cm 4cm 4cm 2cm Catchment area is given as 45 Km2 We…
Q: 1. Determine the direct runoff hydrograph by separating the baseflow. 2. Derive the unit hydrograph…
A: 1- Determination of Direct Runoff hydrograbh and UNIT hydrograbh ###
Q: The intensity of the rainfall for successive 1 hours period of a 6 hours storm are 2, 6, 8, 9, 7 and…
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Q: An effective rainfall of 2-hour duration produced a flood hydrograph peak of 200 m³/s. The flood…
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Q: Example / A 4-hour rain of average intensity 1 cm/hr. falls over the fern leaf type catchments shown…
A: Average rainfall intensity is i=1 cm/hrtotal area of leaf type catchments A=20+30+40+50=140…
Q: Rainfall of intensity 20mm/h occurred over a [wa watershed of area 1km? for duration of six hours.…
A: Given,
Q: Q1. Find the peak discharge for a city for a 2-year storm by using IDF belo overflow distance is 272…
A: Given, Time duration =20 mins From the IDF Curve (for 2- years) i=80 mm/hr
Q: 0. Determine the mean runoff flow in cfs from a drainage area of 175 acres using the English…
A: Given, A = 175 acres L = 72 m S = 2%
Q: An effective rainfall of 2-hour duration produced a flood hydrograph peak of 3 200 m³/s. The flood…
A: given- peak of flood hydrograph=200 m3/sbase flow=20 m3/sExcess rainfall=2 cmϕ=0.4 cm/h
Q: A 24 hour storm occurred over a catchment with 1.8 km2 area and the total rainfall observed was 10…
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Q: This lowers the runoff volume by catching precipitation through vegetation and canopy A potential…
A: This lowers the runoff volume by catching precipitation through vegetation and canopy D)…
Q: A storm with 60 cm of precipitation produced a surface runoff of 33.2 cm. using the storm data shown…
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Q: A catchment area has a time of concentration of 20 minutes, an area of 20 has. and a runoff…
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Q: Rainfall of intensity 0.2 m/hr fell on 2.0 km² area for 4 hrs. Measured runoff during the period was…
A: Answer: 900870 m3
Q: 1- Draw the hyetograph for storm. 2- Estimate the d-index of the storm If the direct runoff produced…
A: Hyetograph is the graph between rainfall Intensity(cm/hr) in Y-axis to Time in X-axis.
Q: The rainfall during three successive 2 hour periods are 0.6, 3.0 and 1.8 cm. The surface runoff…
A: Given data, The rainfall during three successive 2 hour periods is 0.6,3.0 and 1.8 cm. The surface…
Q: The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the -inde: for the…
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Q: Question No. 04 Solve for the following parameters for a storm with 55 cm of precipitation produced…
A: From given data, Storm duration (t)= 16 hr. Total precipitation ( p)= 55cm Runoff produce (r) =…
Q: Determine the value of o for the rainfall hyetograph shown. Assume the depth of direct runoff is 2.5…
A: Answer:-
Q: The rainfall rate is 200mm/day in a surface with CN value equal to 78. Using the solved variable S,…
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Q: Q2: During a three-hour storm, the rainfall over a 100 ha area is 4 cm. There is a constant…
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Q: The intensity of the rainfall for successive 1 hours period of a 6 hours storm are 2, 6, 8, 9, 7 and…
A: Given data- 6 hour strom-1 hr periodRainfall inetnsity 2, 6, 8, 9, 7 and 3 cm/hrRunoff R=4 cm/hr
Q: The rainfall on five successive days on a catchment was 2, 6, 9, 5 and 3 cm. If the g-index for the…
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Q: A 6-h storm had 6 cm of rainfall and the resulting runoff was 3.0 cm. If the pindex remains at the…
A: Given data, Phase-1 t = 6 hours P= 6 cm R = 3 cm Phase-2 t = 9 hours P = 12 cm To find out the…
Q: The rate of rainfall for the successive 30 min periods of a 3-hour storm are: 1.6, 3.6, 5.0, 2.8,…
A: Given- Rate of rainfall for successive 30 min periods of 3 hour storm-1.6, 3.6, 5.0, 2.8, 2.2 &…
Q: Example /A 4-hour rain of average intensity 1 cm/hr. falls over the fern leaf type catchments shown…
A: Solution Given Data Intensity of rainfall= 1 cm/hr Areas of different section AI=20 haAII=30…
Q: In a peak storm day the amount of precipitation occurred was 21 cm for a 3 hours continuously and…
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Q: Problem 4.8 (page 174): The time of concentration of a 2 ac catchment is 20 min. If the composite…
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Q: Q2. Given that CN=65, Determine the effective runoff. Time (hr) Rainfall (mm) 0.5 15 1 25 1.5 15
A: Runoff happens when the water level is very low than the earth's surface can absorb. Effective…
Q: Ехample 2-1 Rain falls as shown in the rainfall hyetograph (intensity Vs. time) in Fig. E2-1 (a).…
A: from hyetograph total rainfall P=1.0+1.0+2.0+1.5+0.5=6 inϕ-index =0.5 in/hrwe know that ϕ-index=P-Qt…
Q: m 4.11. Assuming a dimesionless hydrograph is applicable, determine the duration of flow if the peak…
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Q: In the standard SCS-CN method of modelling runoff due to daily rainfall, if CN = 75, the runoff…
A: given- SCS-CN methodCN=75one day rainfall=100 mm
Q: Determine the value of o for the rainfall hyetograph shown. Assume the depth of direct runoff is 2.5…
A: ANSWER:-
Q: From the the given table, determine the direct runoff if the effective rainfall during 1-hr is 5 mm…
A: solution Given the unit hydrograph which has an effective rainfall of 1mm and the direct runoff…
Q: Example /A 4-hour rain of average intensity 1 cm/hr. falls over the fern leaf type catchments shown…
A: Duration of rainfall = 4 hourIntensity of rainfall = 1 cm/hrConcentration of rainfall for different…
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- Rational Method should not be used for large catchments in estimating peak runoff. Is it true?During a flood in a catchment, when all streams are filled with water, the runoff value is ? A- at the rising limb of the hydrograph. B- at the falling limb of the hydrograph. C- at the falling limb of the hydrograph. D- at the second base flow recession part. What is the correct answer??o. Determine the mean runoff flow in cfs from a drainage area of 175 acres using the English equation for a 25-yr frequency in inches per hour in Nevada, The area is sloping at 2% and is covered with poor surface grass. The furthest point from the inlet is 72 meters.
- The rational formula runoff coefficient of a 950 ft x 600 ft property is 0.35. A storm occurs with a rainfall intensity of 4.5 in/hr. The peak runoff from this property is most nearly Select one: a. 21 cfs b. 90 cfs c. 62 cfs d. 30 cfsB) The rates of rainfall for the successive 30 min period of a 3-hour storm are: 1.6, 3.6, 5.0, 2.8, 2.2, 1.0 cm/hr. The corresponding surface runoff' is estimated to be 3.6 cm. Establish the -index and its coefficient of runoff.For the relation between direct runoff and time? A- It starts and end with base flow. B- It starts before base flow and ends after. C- it It starts and end with direct runoff. D- It starts before base flow and ends with it. What is the correct answer??
- A catchment area of 10 acre consists of 25% high traffic urban paved area with Rv of 0.97, 25% connected flat roof with Rv of 0.83, and 50% silty soil with Rv of 0.11. When 85% percentile of 24-hr precipitation is 0.6 inch, what is the runoff volume based on small storm hydrology method? Select the closet answer. 2The structure and enclosed paved plaza of the BMW Zentrum building, located in Greenville, SouthCarolina, may be approximated as a 70-m diametercircle. Flow path length may be approximatedas the average of the diameter and a half-circumference. The average surface slope ofthiscombinedfacility is approximately 5 percent.(a) Compute time of concentration using the FAA equation. (b) Rainfall intensity for Greenville County may be computed by the formula i = a/ (b + t.)°, usingcoefficients in the following table. What is the expected 25-year rainfall intensity? (c) Using the rational method, whatis the expected peak 25-year runoff from this facility? (d) What factors may contribute to the uncertainty of this runoff estimate?An 40-ha watershed was subjected to a 5- year rainfall with a depth of 122 mm with characteristics given below. Compute for the peak runoff of the watershed. Hydrologic Soil Group Land Use, Area Curve Treatment, and (ha) Number Condition Row crop, 24 82 contoured, good Woodland, good В 16 55
- In a peak storm day the amount of precipitation occurred was 21 cm for a 3 hours continuously and the rate of percolation was 60 mm. Determine the surface runoff flow for storm?Problem 4.7. Determine the runoff volume in millimeters (in.) of depth from 50-year return period storm using local data at your present location assuming Antecedent Rainfall Condition II, Hydrologic Soil-Cover Complex Curve No. 70, and duration of the critical storm 3 hours.A 100-acre watershed that is 80% Industrial and 20% newly graded areas (no vegetation). The watershed has soil group B. Determine the runoff volume for 10-year, 24-hr rainfall event (use the IDF below) 20.0 15.0 10.0 8.0 RAINFALL INTENSITY IN INCHES PER HOUR 6.0 4.0 6 0.1 0.08 0.06 0.04 0.02 5 VDOT B, D & E eqn. except for 1-year NOAA Atlas 14 Vienna/Tysons for 1-year 10 15 20 MINUTES SHINE RETURN PERIOD (YEARS) 30 40 50 60 N 10 DURATION NOAA Atlas 14 Vienna/Tysons 2 3 4 5 6 HOURS 8 10 12 سلسلي 18 24