Mixed Land Use

For areas with a mixture of land uses, a composite runoff coefficient should be used. The composite runoff coefficient is weighted based on the area of each respective land use and can be calculated as:
EquationObject3447
Equation 4-23.
Where:
  • C
    W
     = weighted runoff coefficient
  • C
    j
     = runoff coefficient for area j
  • A
    j
     = area for land cover j (ft
    2
    )
  • n
     = number of distinct land uses