soildat {VFS}

Soil texture class properties

Description

Basic hydrologic properties for twelve soil texture classes.

Usage

data("soildat")

Format

A data frame with 12 observations on the following 9 variables.

Soil

Texture class abbreviation.

SoilName

Texture class name.

Ksat

Saturated hydraulic conductivity (mm d^(-1)).

ThetaSAT

Water potential at saturation.

ThetaFC

Water potential at field capacity.

ThetaWP

Water potential at wilt point.

ff

Fraction of fine (clay) particles.

fm

Fraction of medium (silt) particles.

fc

Fraction of coarse (sand) particles.

Source

Clapp, RB, Hornberger, GM. 1978. Empirical equations for some soil hydraulic properties. Water Resour Res 14:601-604. DOI: 10.1029/WR014i004p00601.

Karkanis, PG. 1983. Determining field capacity and wilting point using soil saturation by capillary rise. Can Agr Eng 25:19-21.

Examples

# state college GHCN data
#
# weather <- read.dly(system.file("extdata", "USC00368449.dly", package = "VFS"))
data("weather") # same object

weather.param <- wth.param(weather, method="markov")

rain.compare <- rainfall(365*2, weather.param)
temp.compare <- temperature(365*2, weather.param)

data(soildat)
data(bufferdat)

# bluegrass buffer, clay loam soil
# short simulation to cut down on time required
vfs.CL <- VFS(nyears = 2, thissoil = subset(soildat, Soil == "CL"), 
rain=rain.compare, temperature=temp.compare, 
thisbuffer = subset(bufferdat, Species == "bluegrass"), Duration = 2, 
FieldArea = 4000, VFSwidth = 10.7, VFSslope = 0.02, 
z = 1000, b = 1.5)

print(vfs.CL)
summary(vfs.CL)

aple.CL <- VFSAPLE(vfs.CL, soilP = 120, OM = 2)

print(aple.CL)
summary(aple.CL)