Calcolatrice Coefficiente di Deflusso Gratuita

Calcola il coefficiente di deflusso con il metodo razionale.

mm/h
hectares

Peak Runoff Rate

0.833 m^3/s

Peak Runoff Rate833.3 L/s

Peak Runoff Rate vs Runoff Coefficient (C)

Vedi formula →

Formula

## Rational Method for Stormwater Runoff The Rational Method is the most widely used formula for estimating peak runoff from small catchments. ### Formula **Q = C i A / 360** where Q is peak flow in m^3/s, C is the runoff coefficient (0 to 1), i is rainfall intensity in mm/h, and A is catchment area in hectares. The factor 360 converts units. This method assumes the entire catchment contributes to runoff when storm duration equals the time of concentration.

Esempio Risolto

5 hectare urban catchment, C=0.6, 100 mm/h intensity.

  1. 01Q = 0.6 x 100 x 5 / 360 = 300/360 = 0.833 m^3/s
  2. 02Q = 833 L/s