4) Compute the peak runoff, Qp, for a 15 year storm using the Rational Method for a drainage basin located in Atlanta, Georgia, and having parameters as follows: A = 14.06 Acres Impervious: 0.06 acres Grass: 6.5 acres Woods: 7.5 acres Overland Flow: Average Grass, 100' long, 5.0% slope Shallow Concentrated Flow: 50' long, 7.0% slope

4) Compute the peak runoff, Qp, for a 15 year storm using the Rational Method for a drainage basin located in Atlanta, Georgia, and having parameters as follows: A = 14.06 Acres Impervious: 0.06 acres Grass: 6.5 acres Woods: 7.5 acres Overland Flow: Average Grass, 100' long, 5.0% slope Shallow Concentrated Flow: 50' long, 7.0% slope

Traffic and Highway Engineering

5th Edition

ISBN:9781305156241

Author:Garber, Nicholas J.

Publisher:Garber, Nicholas J.

Chapter16: Highway Drainage

Section: Chapter Questions

Problem 7P

See similar textbooks

Similar questions

Determine the peak runoff (Nearest whole number) from a 100-year storm for the watershed described below: Field 1: 192 acres, 2% slope, cultivated, sandy soil Field 2: 38 acres, 8% slope, pasture, tight clay soil Field 3: 40 acres, 11% slope, woodland, silt soil The drainage way is 4000 feet with a 0.1% slope.
2) Compute the peak runoff, qp, using the NRCS Methbd for a 100 year storm for a drainage basin located near Atlanta, Georgia, and having the following parameters: Am 1.413 s.m. CN = 68.0 tc = 2.35 hours
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
The streamflow data given in the table was produced by a storm of 1-hour duration considered to have uniform intensiry over the catchment. If the catchment area is 5 km', calculate the equivalent runoff depth for the catclument. Q. Total (n/s) flow Q. (n/s) Time Baseflow (hr) 2.80 2.80 2.78 2.60 3 6.23 2.60 14.50 2.60 16.57 2.60 13.03 2.60 7. 9.35 2.60 5.95 2.60 4.25 2.60 10 2.97 2.60 2.12 2.12 12 1.70 1.70 13 1.53 1.53 14 1.53 1.53
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.
Example 3 * In a 350 ha catchment the CN value was assessed as 70 for AMC-III. (a) Estimate the value of direct runoff volume for the following 4 days of rainfall. The AMC on July 1st was category II. Use standard SCS-CN equation Date July 1 July 2 July 3 July 4 Rainfall (mm) 50 20 30 18 (b) What would be the runoff volume if the CN value were 80? 41
Problem 4.3. By rational method, determine the design peak runoff for a 50-year return period. The watershed consists of 50-ha (120-ac), one third in rotation meadow and the remainder on row crops on the contour. The hydrologic soil group is B and the time of concentration is 30 min. The watershed is at your present location.
Problem 3.24 (page 119): The soil in a watershed has the following properties: 0, = 0.02, 0fe= 0.25, and 0 = 0.38. The watershed has a composite ARC II curve number of CN 80. A storm with a rainfall of 30 mm occurs in dormant season. During the five days before the storm begins, the total rainfall is 25 mm. Estimate the direct runoff from this storm using the MORE and SCS-CN models. %3D %3D %3D
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?
Subject: Hydrology Give me right solution Determine the 10-year period peak runoff for 80 hectare watershed having a runoff coefficient of 0.4. The maximum length of flow of water is 610 meters and the fall along this path is 6.0 meters. The rainfall intensity for that return period is 101.25 mm/hr having duration equal to the time of concentration.
Question During a 6-hour storm the rainfall intensity was 0.8 cm/hr on a catchment of area 8.6 km². The measured runoff volume during this period was 2,56, 000 m³. The total rainfall last due to infiltration, evaporation and transpiration in cm/hr is A 0.80 0.304 0.496 Sufficient information not available
The ordinates of a hydrograph of surface runoff resulting from 4.5cm of rainfall excess of duration 8 hours in a catchment are as follows. Determine the ordinates of the 8h unit hydrograph for this catchment. Tabulate your solution and plot the 8H-UH.