Question 8. [2 Points] Create a 60-minute hydrograph for a 10-acre flat lawn covered with yellowbluestem grass on clayey loam soil and the time of concentration = 20 minutes. A 10-year stormfrequency is to be considered. Calculate the volume of the storm runoff.

1. Calculate the runoff coefficient for yellow bluestem grass on clayey loam soil, typically around…

Answered: Question 8. [2 Points] Create a…

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 11P

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3. A 5-acre apartment complex receives 1.25 in./hr. of rain for 6 hours. During the storm event, 0.1 in/hr. of water evaporates, and a volume of 15 acre-inches accumulates on the lot. The rest leaves the lot as runoff. Assume that there is no infiltration in this scenario. a. Using a water balance, determine the total volume of runoff generated by the storm. b. Calculate the runoff coefficient.
Read the question carefully and give me right solution according to the question. A watershed received 68 mm of rain on 1 day. It has open spaces with 60% grass cover and Group A soil. Previous to this event, the watershed had received 34 mm rainfall in the past 5 days. Compute the direct runoff by using the SCS method.
Problem-1 A watershed is divided into sections as shown below. Runoff from each section will contribute to flow at gauge G as indicated in the table. For an excess rainfall intensity of 0.5 in/hr falling uniformly for 5 hrs, determine the resulting direct runoff hydrograph (DRO). D A C D Area [ac] 150 250 350 200 Time to G [hr] 2 4 G
Question 2. A 4-hour UH (GH) has the values shown below. Determine the runoff from a design downpour that will consist of the determined net precipitations: 20 mm/hr net precipitation for 2 hours, no precipitation for the next 2 hours, then 10 mm/hr precipitation for 2 hours. Assume that the groundwater base flow is a constant 3 m3/s during the design downpour time (hour) UH4 (m³/s) 0 0 2 2.35 4 7.00 6 9.75 8 7.50 10 4.20 12 1.80 14 0
Calculate the runoff from a watershed of (0.01 x 4737) ha. The following data are available: Depth of rainfall is 100 mm. Antecedent rainfall condition, AMC 1: Row crop, good condition in 40 ha (Soil group C) Woodland, good condition in 20 ha (Soil group B) The day after the rainfall of 100 mm, another rainfall of 50 mm occurred. Solve for the surface runoff from the watershed. [ NOTE: Where R is the last four digits of your Registration Number. R = 4737 ]
Runoff data have been collected for a 4-hour storm over a 120 acre watershed as indicated in the table. If the total volume of water infiltrated during the storm was 3.0 Ac-ft and the Phi Index is 0.1 in/hr, sketch the rainfall hyetograph with EVERYTHING labeled appropriately. Also, report the depth and volume of precipitation (in inches and Ac-ft, respectively) for each 1-hour period.
Compute the rainfall intensity. Complete solution
02: Table below shows a rainfall data gathered from a storm occurred on a watershed area 2851 km² with direct runoff 856 m³/sec. Determine the W and index for this area and check the validity of your solution. Time (hrs) Rainfall 14.3 8.0 7.2 3.8 2.0 (mm) 1 2 3 4 5 6 7 8 1.3 1.0 0.0 9 0.8 10 11 12 13 0.0 13.9 17.2 2.0 14 15 0.9 1.5
The area under consideration is 250 acres of open pasture and you intend to pave 30% with reinforced concrete. You determine that the time of concentration for this area will decrease from 3 hours to 40 minutes after the ramp is in place. Currently a grass-lined drainage ditch carries the runoff for the 250 acres. For runoff coefficients, use the highest published range value in the approriate category.a) If you design for a 50-yr storm, how much will the peak runoff flow rate change? Reportthe answer as a % increase in flowrate.b) Determine if the drainage ditch will still be capable of carrying the runoff once thepaving is complete.c) What happens if the drainage ditch is paved with float finished concrete? How deep isthe flow? n = 0.025s = 1%ymax = 3 ft
Using the total direct runoff hydrograph given, derive a 2 hour unit hydrograph for the 2,850 acre drainage area. The rainfall duration was 2 hours and the total precipitation was 6 inches.
Q10) Calculate the efficiency of water application if a watercourse of 0.085 m3/sec was supplied to a field for two hours, the averaged amount of runoff averaged 0.04 m3/sec for one hour, and depth of root zone depth is 1.5m. Assume there no evaporation losses has been Occur. O 23.5 % O 76.5 % 25 % O None of the above
A 1000 acre reservior recieves 100 in of rain during a rainfall of 24 months. during this period, the mean flow to the stream is 10cfs mean outflow from the stream of 8cfs and an increase in storage is 4000 acre-feet. compute evapotranspiration in acre feet as well as inches

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Question 8. [2 Points] Create a 60-minute hydrograph for a 10-acre flat lawn covered with yellow bluestem grass on clayey loam soil and the time of concentration = 20 minutes. A 10-year storm frequency is to be considered. Calculate the volume of the storm runoff.