New Modified Rational Formula in InfoSWMM
New Modified Rational Formula in InfoSWMM InfoSWMM H2OMap SWMM now offers 12 choices for modeling surface runoff including the new Modified Rational Method (MRM) 1. EPA SWMM 5 Nonlinear Reservoir 2. The Colorado Urban Hydrograph Procedure (CUHP) 3. NRCS (SCS) Dimensionless Unit Hydrograph Method 4. NRCS (SCS) Triangular Unit Hydrograph Method 5. Delmarva Unit Hydrograph 6. Snyder Unit Hydrograph Method 7. Clark Unit Hydrograph Method 8. Espey Unit Hydrograph Method 9. Santa Barbara Urban Hydrograph Method 10. San Diego Modified Rational Method 11. Modified Rational Method (NEW!) 12. German Runoff (NEW!) The Rational method is a widely used technique for estimation of peak flows from urban and rural drainage basins (Maidment 1993; Mays 2001). Stormwater modeling applications such as the design of detention basins require knowledge of total inflow volume obtained from runoff hydrographs. For these applications peak flow information alone may not be sufficient. The San Di...