Description Usage Arguments Details Author(s) See Also
The hydraulic properties of sedimentary material are roughly dependent on the proportions of grain size due to sand, silt, and clay; these are common categorical distinctions found in drillers logs.
1 2 3 4 | sand_silt_clay(shepard.diagram = TRUE, silt.lims = c(-0.01, 1.01),
add.frame = FALSE, ...)
shepard_plot(init = FALSE)
|
shepard.diagram |
logical; should Shepards' (1954) classification system be overlain? |
silt.lims |
numeric; vector of length two controlling the horizontal (silt) axis limits. |
add.frame |
logical; should a box be drawn around it? |
... |
additional parameters (unused) |
init |
logical; forces device instantiation. |
A more detailed classification system for soils is used by the
USDA; however, Shepard's diagram is adquate for a sand-silt-clay
model, and shepard_plot
adds them to the current device.
This function is intended for a ternary diagram normalized to
percent particle size so that hydraulic parameters may be
estimated from drillers logs.
Andrew J. Barbour <andy.barbour@gmail.com>
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