Rational Method Hydrologic Calculations with Excel Harlan H. Bengtson, PhD, P.E. COURSE CONTENT 1. Introduction Calculation of peak storm water runoff rate from ...
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 ...
C = Rational Method runoff coefficient I = rainfall intensity (inches per hour) A = drainage area (acres) D = storm duration (hours) ... Down
C = Rational Method runoff coefficient I = rainfall intensity (inches per hour) A = drainage area (acres) D = storm duration (hours)www.njstormwater.org/bmp_manual/NJ_SWBMP_5 print.pdf
Chapter 4—Drainage Section 4A-5—Using the Rational Method to Determine Peak Flow Page 3 of 10 Table 1: Runoff coefficients for the Rational Method.www.iowadot.gov/design/dmanual/04a-05.pdf
Chapter 3 - Estimating Stormwater Runoff 3.5 RATIONAL METHOD The R ational For mula is the most commonl y used method of deter mining peak dischargeswww.pdhonline.org/courses/h119/stormwater runoff.pdf
A popular approach for determining the peak runoff rate is the Rational Formula. The Rational Method ... Calculation of t c ... Rational Method Runoff ...www.knoxcounty.org/stormwater/pdfs/vol2/3-1-3 Rational Method.pdf