VIC_soilParam: VIC model soil parameters

In rpkgs/hydroTools: Tools for hydrological model

VIC model soil parameters

Description

Soil parameters for VIC model (calculated from HWSD database)

• expt : 3+2b (Eq. 17)

• Kstat: Saturated conductivity (mm/hr) (Eq. 16)

• bubble: Bubbling pressure (cm) (Eq. 4)

• Wcr_FT : Field Capacity, Fractional soil moisture content at the critical point (~70% of field capacity) (fraction of maximum moisture)

• Wpwp_FT : Wilting Point, Fractional soil moisture content at the wilting point (fraction of maximum moisture)

Usage

expt(S, C, OM)

Ksat(S, C, OM)

bubble(S, C, OM)

Wcr_FT(S, C, OM)

Wpwp_FT(S, C, OM)

Arguments

S	the weight ratio of Sand, (weight ratio, 0-1)
C	the weight ratio of Clay, (weight ratio, 0-1)
OM	the percentage of Organic Matter, (%w, 0-100)

Details

• Kstat: unit has changed from mm/h to mm/day

References

Saxton, K. E., & Rawls, W. J. (2006). Soil water characteristic estimates by texture and organic matter for hydrologic solutions. Soil Science Society of America Journal, 70(5), 1569-1578. https://doi.org/10.2136/sssaj2005.0117

Examples

S = C = 0.20; OM = 2.5
expt(S, C, OM)
Ksat(S, C, OM)           # 12.19
bubble(S, C, OM)
field_capacity(S, C, OM) # 32.1%
wilting_point(S, C, OM)  # 13.8%
# Fractional soil moisture
Wcr_FT(S, C, OM)
Wpwp_FT(S, C, OM)

rpkgs/hydroTools documentation built on Oct. 8, 2024, 7:47 p.m.