plotAvailWater: Visual Demontration of Available Soil Water

In sharpshootR: A Soil Survey Toolkit

Description

Generate a simplistic diagram of the various fractions of water held within soil pore-space.

Usage

plotAvailWater(x, width = 0.25, cols = c(grey(0.5), 
"DarkGreen", "LightBlue", "RoyalBlue"), name.cex = 0.8)

Arguments

x	a data.frame containing sample names and water retention data, see examples below
width	vertical width of each bar graph
cols	a vector of colors used to symbolize 'solid phase', 'unavailable water', 'available water', and 'gravitational water'
name.cex	character scaling of horizon names, printed on left-hand side of figure

Author(s)

D.E. Beaudette

Examples

# demonstration
s <- data.frame(
name=c('loamy sand', 'sandy loam', 'silt loam', 'clay loam'), 
pwp=c(0.05, 0.1, 0.18, 0.2), 
fc=c(0.1, 0.2, 0.38, 0.35), 
sat=c(0.25, 0.3, 0.45, 0.4))
s$solid <- with(s, 1-sat)

par(mar=c(5, 6, 0.5, 0.5))
plotAvailWater(s, name.cex=1.25)

# use some real data from SSURGO
## Not run: 
library(soilDB)

q <- "SELECT hzdept_r as hztop, hzdepb_r as hzbottom, 
hzname as name, wsatiated_r/100.0 as sat, 
wthirdbar_r/100.0 as fc, wfifteenbar_r/100.0 as pwp, awc_r as awc
FROM chorizon 
WHERE cokey IN (SELECT cokey from component where compname = 'dunstone') 
AND wsatiated_r IS NOT NULL 
ORDER BY cokey, hzdept_r ASC;"

x <- SDA_query(q)
x <- unique(x)
x <- x[order(x$name), ]
x$solid <- with(x, 1-sat)

par(mar=c(5, 5, 0.5, 0.5))
plotAvailWater(x)

## End(Not run)

sharpshootR documentation built on May 2, 2019, 4:46 p.m.