Spatial Combination Modeling Framework of Saturation-Excess and Infiltration-Excess Runoff for Semihumid Watersheds

Table 1

Hydrological soil groups.

Hydrologic soil group	Saturated hydraulic conductivity mm/h	Runoff generation characteristics	Soil types
A	>110	Soils have low runoff potential and high infiltration rates even when thoroughly wetted	Mainly sand, loamy sand, and sandy loam
B	14~110	Soils have moderate infiltration rates when thoroughly wetted	Mainly silty sand and loam
C	1.4~14	Soils have low infiltration rates when thoroughly wetted	Mainly sandy clay loam
D	<1.4	Soils have high runoff potential and very low infiltration rates even when thoroughly wetted	Mainly clay loam, silty clay loam, sandy clay, silty clay, and clay