What is C in the Rational method?

The Rational method predicts the peak runoff according to the formula: Q=CiA, where C is a runoff coefficient, i is the rainfall intensity, and A is the subcatchment area. This formula is applicable to US or metric evaluation, as long as consistent units are employed.

What is C in Q CiA?

Q = CiA. where. Q= design peak runoff rate, cfs. C = runoff coefficient, dimensionless – defined as the ratio of the peak runoff rate to the rainfall intensity.

What is the Rational method?

The Rational Method expresses a relationship between rainfall intensity and catchment area as independent variables and the peak flood discharge resulting from the rainfall as the dependent variable. It has been used for over 150 years, and known as the Rational Method for nearly 100 years.

How do you find the Rational runoff coefficient?

The Rational Formula is expressed as Q = CiA where: Q =Peak rate of runoff in cubic feet per second C =Runoff coefficient, an empirical coefficient representing a relationship between rainfall and runoff.

How do you use Q CIA?

Calculate peak flow using Equation 4A-5_1: Q = CIA = 0.95 × 6.12 × 0.09 = 0.52 ft3/s 3) Combined area. To calculate peak flow for the combination of the lawn and the paved area, use the flowpath associated with the longest Tc. In this situation, the lawn has the longest Tc (8 min).

What is peak runoff?

The flow at outlet starts with minimum flow called base flow (sometimes its value is zero) and attains the maximum flow after some times and then recedes to base flow again. This time variation of flow is called hydrograph. The maximum flow at outlet thus attained is called peak flow of runoff.

How is Q in CIA calculated?

Calculate peak flow using Equation 4A-5_1: Q = CIA = 0.95 × 6.12 × 0.09 = 0.52 ft3/s 3) Combined area. To calculate peak flow for the combination of the lawn and the paved area, use the flowpath associated with the longest Tc.

What unit is CSM?

The Command Sergeant Major (CSM), as the most senior sergeant of a color-bearing unit, began in December 1975. In contrast, the duties of a Sergeant Major have been defined in the US Army since the days of von Steuben (1779).

How to give values to arrays in C?

Initializer List: To initialize an array in C with the same value,the naive way is to provide an initializer list.

  • Designated Initializer: This initializer is used when we want to initialize a range with the same value.
  • Macros: For initializing a huge array with the same value we can use macros.

    • What is the max value of INT in C?

    The macros defined in this header, limits the values of various variable types like char, int and long. These limits specify that a variable cannot store any value beyond these limits, for example an unsigned character can store up to a maximum value of 255.

    What are C values?

    The c-value is where the graph intersects the y -axis. In this graph, the c-value is -1, and its vertex is the lowest point on the graph known as a minimum. Changing the c-value changes where the graph intersects the y -axis. For example, the graphs of the following equations would look almost the same.

    What are the values of C?

    C-value is the amount, in picograms, of DNA contained within a haploid nucleus (e.g. a gamete) or one half the amount in a diploid somatic cell of a eukaryotic organism. In some cases (notably among diploid organisms), the terms C-value and genome size are used interchangeably; however, in polyploids the C-value may represent two or more genomes contained within the same nucleus.