Problems 6-7: Use the SCS (soil conservation service) curve number (CN) handout Given a 7 mi fully pervious watershed of Group-2 soil characteristics, 6. Use the SCS Curve Number method to find, nearly, the surface runoff depth in inches. Gross rainfall depth from a 24-hour storm is 12 inches. The curve number, CN, is 61. (A)8.46 inches (B) 7.63 inches (C) 6.72 inches (D) None of the above

Problems 6-7: Use the SCS (soil conservation service) curve number (CN) handout Given a 7 mi fully pervious watershed of Group-2 soil characteristics, 6. Use the SCS Curve Number method to find, nearly, the surface runoff depth in inches. Gross rainfall depth from a 24-hour storm is 12 inches. The curve number, CN, is 61. (A)8.46 inches (B) 7.63 inches (C) 6.72 inches (D) None of the above

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Compute the 4-hr Snyder's synthetic unit hydrograph for a watershed with an area of 27.8 square miles and a main channel length of 16.3 miles. The main channel length from the outlet to the point opposite the centroid of the watershed is 5.4 miles. The regional parameters are C₁ = 1.7 and C₂ = 0.5. Plot the resulting hydrograph and label the lagged time to peak (tr), time to peak (TDR). peak discharge (Q₂R), and time base (T₁). (similar to 8.4.4)
Design a pond for treating leachate from a sanitary landfill having an area of 5000 square meters if the runoff coefficient is 0.40 and effective rainfall is 60 mm/hr. The receiving body of water is Class B. Assume appropriate design data.
Will the following rectangular channel (base = 8 ft, height = 3 ft) be able to provide adequate conveyance for the drainage area shown in the figure below? The channel roughness (n) is 0.02 and slope is 0.01 (ft/ft). Use the rational method and assume a runoff coefficient of 0.75 and rainfall intensity of 2.5 in/hr to calculate the runoff. 2,000 ft 700 ft Channel 500 ft
please show steps
Rational Method: Determine the pre (C = 0.3) and post development (C= 0.75) peak runoff for a 90-acre site that experiences a 0.35 inches/hour rainfall intensity, using the rational method. Show all your work, including any assumptions you will make.
Solve the problem using the NRCS method for a watershed located right outside New York City, New York for a 50 year storm event. Assume the soil hydrologic group B (65%), C (25%) and D (10%). Given Am-1.29 sm. Impervious = 6.6 acres, Woods =819 acres. Overland flow: L=100 ft, s=4%, fair; Shallow Concentrated Flow: unpaved L= 2300 ft, s=2.7%, stream flow L=9000 ft, s= 3.4% The Time of Concentration is 20¹ 12¹ n = 0.035
I hope your help hydraulic question thanks
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
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?
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 ]