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#### Rational Method Hydrologic Calculations with Excel.pdf

**Rational Method** Hydrologic Calculations with Excel Harlan H. Bengtson, PhD, P.E. COURSE CONTENT 1. Introduction **Calculation** of peak storm water **runoff** rate from ... Down

#### The Modified Rational Method - NJCDEA.pdf

**Rational Method** Equation: Based upon the **Rational Method** Equation: Q = C x I x A x APF Where: Q = The Quantity Flow Rate in CFS C = Dimensionless **Runoff Coefficient** ... Down

#### CHAPTER 5 Computing Stormwater Runoff Rates and.pdf

C = **Rational Method** **runoff coefficient** I = rainfall intensity (inches per hour) A = drainage area (acres) D = storm duration (hours) ... Down

#### CHAPTER 5 Computing Stormwater Runoff Rates and …

C =

www.njstormwater.org/bmp_manual/NJ_SWBMP_5%20print.pdf**Rational Method****runoff coefficient**I = rainfall intensity (inches per hour) A = drainage area (acres) D = storm duration (hours)#### Estimating Storm Water Runoff - PDHonline.org

Chapter 3 - Estimating Stormwater

www.pdhonline.org/courses/h119/stormwater%20runoff.pdf**Runoff**3.5**RATIONAL METHOD**The**R ational**For mula is the most commonl y used**method**of deter mining peak discharges#### 2C-4 Rational Method - Center for Transportation …

Section 2C-4 –

ctre.iastate.edu/pubs/stormwater/documents/2C-4RationalMethod.pdf**Rational Method**Version 2; December 5, 2008 5 assumed to be the sum of two flow times. The first is the time required for the surface**runoff**to#### Using the Rational Method to Determine Peak Flow

Chapter 4—Drainage Section 4A-5—Using the

www.iowadot.gov/design/dmanual/04a-05.pdf**Rational Method**to Determine Peak Flow Page 3 of 10 Table 1:**Runoff**coefficients for the**Rational Method**.