VFSAPLE: Link the VFS and APLE models.

In sgoslee/VFS: Vegetated Filter Strip and Erosion Model

Link the VFS and APLE models.

Description

Uses the erosion and runoff output of VFS as input to APLE.

Usage

VFSAPLE(x, soilP, OM, manureP = 25, manureSolids = 25, manureWEP = 50,
    manureIn = 40, fertP = 10, fertIn = 40)

Arguments

x	VFS object.
soilP	soil test Mehlich 3 phosphorus (mg/kg).
OM	soil organic matter (%).
manureP	manure P applied (kg/ha).
manureSolids	manure solids (%).
manureWEP	manure water-extractable phosphorus/TP (%).
manureIn	manure incorporated (%).
fertP	fertilizer phosphorus applied (kg/ha).
fertIn	fertilizer incorporated (%).

Details

The VFSAPLE function handles unit conversion and parameter estimation. Erosion, precipitation, runoff, and field parameters from VFS are passed to APLE. It also runs APLE for both pre- and post-filter strip erosion values, so the efficacy of the filter strip at phosphorus removal can be calculated.

Value

preVFS	APLE object for pre-filter strip erosion values.
postVFS	APLE object for post-filter strip erosion values.
pErosion	Efficacy of the filter strip at removing erosion phosphorus (%).
pTotal	Efficacy of the fiter strip at removing total phosphorus (%).

Author(s)

Sarah Goslee

See Also

APLE, VFS

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)

sgoslee/VFS documentation built on May 25, 2022, 5:11 a.m.