Can Please Help Me: Civil Engineering 60 minutes only the given time. Wish you could help me. I will give UPVOTE and GOOD FEEDBACK. //Question Estimate the peak runoff rate from a 20-hectare drainage basin if rainfall depth for 6 hours reached 60 mm. Use typical runoff coefficient of 0.35. [Ans. 0.2cms] //Question

Can Please Help Me: Civil Engineering 60 minutes only the given time. Wish you could help me. I will give UPVOTE and GOOD FEEDBACK. //Question Estimate the peak runoff rate from a 20-hectare drainage basin if rainfall depth for 6 hours reached 60 mm. Use typical runoff coefficient of 0.35. [Ans. 0.2cms] //Question

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 9P

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Can Please Help Me: Civil Engineering

60 minutes only the given time. Wish you could help me.

I will give UPVOTE and GOOD FEEDBACK.

//Question

Estimate the peak runoff rate from a 20-hectare drainage basin if rainfall depth for 6 hours reached 60 mm. Use typical runoff coefficient of 0.35. [Ans. 0.2cms]

//Question

4. Estimate the peak runoff ratefrom a 20-hectare drainage basin if rainfall depthfor 6 hours reached
60 mm. Usetypical runoff coefficient of 0.35. [Ans. 0.2cms]

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Please carrect 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.
Q.provide answer
B: The direct runoff hydrograph is 64hr and maximum discharge is 30 m/sec. If the observed runoff due to 12hr storm of uniform intensity is 0.5 cm/hr and the catchment area is 120 km². Determine the o index for the basin in cm/hr.
please answer if sure it is correct, will thumbs up if correct.
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.
You are designing a drainage system for a residential site in Atlanta using a 10-year return period. The site has an area of 1 ha, a flow length of 100 m, an average slop of 1%, a Manning's number of 0.25 and Type B soil. Drainage regulations require that the kinematic wave equation be used to calculate the time of concentration. You are allowed to use either the rational method or TR-55 to calculate the peak runoff rate. It is suggested you used a runoff coefficient of 0.4, which is typical for residential sites. What curve number would be required for both the rational method and the TR-55 method to provide the same peak runoff rate?
8. A basin is divided by 1-h isochrones into four sub-areas of size 200, 250, 350 and 170 hectares from the upstream end of the outlet respectively. A rainfall event of 5-h duration with intensities of 1.7 cm/h for the first 2 h and 1.25 cm/h for the next 3 h occurs uniformly over the basin. Assuming a constant runoff coefficient of 0.5, estimate the peak rate of runoff. (An isochrone is a line on the catchment map joining points having equal time of travel of surface runoff)
QUESTION 5 (a) What pollutants that can be found in stormwater and what are the sources? (b) Design a circular drainage pipe to carry 3.6 m³/s of stormwater. The slope and length of the pipe are 1.8% 2.0 m respectively. Manning roughness coefficient is 0.013. COUTUREIT
B) 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.
PLEASE SHOW THE SOLUTION CLEARLY FIND THE RUNOFF COEFFICIENT
Rational Method should not be used for large catchments in estimating peak runoff. Is it true?