Te Rational Method is a widely used and technique for estimating peak flood runoff from small catchments. It provides a expexforward approach to determinate thee maximum flow rate during storm events. This guidede explains each step involved in calculating food runoff using this methodd.

Uzgodnienie to Rational Method

Te Rational Method calculates peak runoff (Q) based on rainfall intensity, catchment area, and runoff coefficient. The basic formula i:

Xi1; Xi1; FLT: 0 Xi3; Xi3; Q = CIA Xi1; Xi1; FLT: 1 Xi3; Xi3;

Kiedy:

  • Xi1; Xi1; FLT: 0 Xi3; Xi3; Q Xi1; Xi1; FLT: 1 Xi3; Xi3; = Peak runoff (cubic meters per second)
  • = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
  • = = Intensywność pracy (Meters per hour)
  • BEZ 1; BEZ 1; FLT: 0 BEZ 3; BEZ 3; BEZ 1; BEZ: 1 BEZ 3; BEZ; BEZ 3; BEZ; = CECARE (hektary)

Etap - by- Step Calculation Process

Follow these steps to estimate flood runoff:

1. Określ, że te Catchment Area

Mierzy się je or obtain the area of te catchment in hectares. This je te land area contribuing to runoff during a storm event.

2. Wybór tego Runoff Coefficient (C)

Te współsprawność jest podstawą naszej pracy i jest surface type.

  • Urzad Urban: 0,7- 0,95
  • Grasslandy: 0,2- 0,5
  • Lasy: 0,1- 0,3

3) Find thee Rainfall Intensity (i)

Identyfikacja tych deszczu intensity for thee storm duration and return period. This data is usually portained from local rainfall records or design charts.

4. Obliczenia te Peak Runoff (Q)

They formula: Q = CiA. Ensure units are consistent. Convert area to hectares if necessary, and rainfall intensity to meters per hour.

Badanie Calculation

Pomocnik chwytnika area of 50 hectares, a runoff coefficient of 0.8, and a rainfall intensity of 0.05 meters per hour ar e given. The peak runoff i:

Q = 0,8 × 0,05 × 50 = 2 metry sześcienne per second.