Question

In: Civil Engineering

You are using the rational method for calculating the surface runoff in a rural area. The...

You are using the rational method for calculating the surface runoff in a rural area. The area is flat, permeable grassland.

Calculate the runoff coefficient (C).

Solutions

Expert Solution


Related Solutions

a. Explain how the catchment area is determined when calculating surface runoff. b. How can the...
a. Explain how the catchment area is determined when calculating surface runoff. b. How can the adverse effects of urban development on downstream runoff be minimized? Name the principles and discuss.
Using the rational method, determine the amount of runoff that would occur for a paved parking...
Using the rational method, determine the amount of runoff that would occur for a paved parking lot that is 100m * 50m and is uniformly sloped from one long edge to the other long edge at a rate of 2%. The time of concentration for this parking is 4 minutes. The five-year storm with duration of 4 minutes has an intensity of 10 mm/hr. The runoff coefficient for this parking lot is 0.80.آ [Q=0.166 CIA] The runoff from part (a)...
Using the rational method, determine the amount of runoff that would occur for a paved parking...
Using the rational method, determine the amount of runoff that would occur for a paved parking lot that is 100m * 50m and is uniformly sloped from one long edge to the other long edge at a rate of 2%. The time of concentration for this parking is 4 minutes. The five-year storm with duration of 4 minutes has an intensity of 10 mm/hr. The runoff coefficient for this parking lot is 0.80.آ [Q=0.166 CIA] The runoff from part (a)...
Describe briefly the principle of the Rational method and the limitation of this method for runoff...
Describe briefly the principle of the Rational method and the limitation of this method for runoff estimation. A sub-catchment of area 0.1km2 is built on gently sloping land. The average slope of the land is 0.001. The length of the longest natural flow path L is 276.3m. The flow time tf in the drainage system is 3min. Determine the 50yr design discharge for the subdivision using the rational method, given that the average runoff coefficient of the subdivision is C=0.7....
short answers T          F          When using the runoff coefficient, c, the Rational Method assumes that land...
short answers T          F          When using the runoff coefficient, c, the Rational Method assumes that land uses are uniformly distributed within a drainage area. What is the overland flow travel time for a hydraulic path 140 ft long through dense grass at an average slope of 1.0%? 1 minute 4 minutes 21 minutes 25 minutes The rational method assumes rainfall duration equal to the time of concentration. If an estimated time of concentration is larger than the actual time of...
In rational method, the peak runoff is given by Q = Cf. C. i. A. The...
In rational method, the peak runoff is given by Q = Cf. C. i. A. The intensity i can be obtain from IDF curves. Discuss why a duration equal to time of concentration is used to determine the intensity
In the Rational Method the peak runoff resulting from a rainfall event depends on which of...
In the Rational Method the peak runoff resulting from a rainfall event depends on which of the following factors The frequency and duration of the rainfall event. The size of the area on which the rainfall lands. The characteristics of the surface over which the rainwater flows. The time that has elapsed since the last rainfall event. I, II, III and IV. I, II and III only. I and III only. II and III only. Which of the following are...
The time area method is often used to estimate catchment runoff process. In this method, the...
The time area method is often used to estimate catchment runoff process. In this method, the catchment of concern is split into several sub-areas where runoff generated from each sub-area is thought to take the same amount of time to travel to the outlet of the catchment. Suppose a catchment can be split into M sub-areas. For the i-th sub-area (i=1,2,…, M), the size of the area is Ai km2 and it takes i-th hours for the runoff generated to...
I used my catchement area to calculate my runoff using the national method. how will i...
I used my catchement area to calculate my runoff using the national method. how will i go on calculating the volume needed for storage? which equations will i use ? i want to have a storage tank that is pumped to the wetland. how will i distribute the volume and calculate the sizing for each. Can you explain with an example if you can?
/* calculating area of a circle, calculating area of a rectangle, calculating area of a triangle,...
/* calculating area of a circle, calculating area of a rectangle, calculating area of a triangle, and quit. */ import java.util.Scanner; public class GeoCalculator {    public static void main(String arg[]) { int geoCalc; //number selection of user Scanner get = new Scanner(System.in); //display section. System.out.println("Geometry Calculator"); System.out.println("Please select from the following menu:"); System.out.println("1. Calculate the Area of a Cirlce."); System.out.println("2. Calculate the Area of a Rectangle."); System.out.println("3. Calculate the Area of a Triangle."); System.out.println("4. QUIT"); System.out.println("Please make a selection:...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT