Horton Curve

Soil Type

 

Description

(A) DRY soils (with little or no vegetation):

  • Sandy soils: 127 mm/hr (5 in/hr)

  • Loam soils: 76.2mm/hr (3 in/hr)

  • Clay soils: 25.4mm/hr (1 in/hr)

(B) DRY soils (with dense vegetation):

Multiply values given in (A) by 2.

(C) MOIST soils:

  • Soils that have drained but not dried out i.e. field capacity - Divide values from (A) and (B) by 3.

  • Soils close to saturation - Choose value close to min. infiltration rate.

  • Soils that have partially dried out - Divide values from (A) and (B) by 1.5 - 2.5.