View source: R/sw_Pedotransfer_Functions.R
pedotransfer | R Documentation |
Deprecated pedotransfer functions to convert between soil moisture (volumetric water content, VWC) and soil water potential (SWP)
Calculate volumetric water content from soil water potential and soil texture
Calculate soil water potential from volumetric water content and soil texture
pdf_to_vwc(
swp,
sand,
clay,
thetas,
psis,
b,
MPa_toBar = -10,
bar_conversion = 1024
)
pdf_to_swp(
vwc,
sand,
clay,
thetas,
psis,
b,
bar_toMPa = -0.1,
bar_conversion = 1024
)
SWPtoVWC(swp, sand, clay, ...)
VWCtoSWP(vwc, sand, clay, ...)
swp |
A numeric value, vector, or 2-dimensional object (matrix or data.frame). The soil water potential (of the soil matrix) in units of MPa, i.e., the soil without the volume of rock and gravel. |
sand |
A numeric value or vector. Sand content of the soil layer(s) as
fractional value in |
clay |
A numeric value or vector. Clay content of the soil layer(s) as
fractional value in |
thetas |
Soon obsolete ... (see |
psis |
Soon obsolete ... (see |
b |
Soon obsolete ... (see |
MPa_toBar |
Soon obsolete ... (see |
bar_conversion |
Soon obsolete ... (see |
vwc |
A numeric value, vector, or 2-dimensional object (matrix or data.frame). The matric soil moisture, i.e., reduced by the volume of rock and gravel. |
bar_toMPa |
Soon obsolete ... (see |
... |
Additional arguments. |
Volumetric water content in units of m^3 (of water) / m^3 (of soil)
[0, 1]
. There are six use cases:
1)
Input: SWP
[single value]; sand
and clay
[single values]
Output: VWC
[single value]
2)
Input: SWP
[single value]; sand
and clay
[vectors of length d]
Output: VWC
[vector of length d]
3)
Input: SWP
[vector of length l]; sand
and
clay
infraction [single values]
Output: VWC
[vector of length l]
4)
Input: SWP
[vector of length l]; sand
and
clay
[vectors of length d]
Output: VWC
[l x d matrix] where SWP
is
repeated for each column
5)
Input: SWP
[l x d matrix]; sand
and clay
[single values]
Output: VWC
[l x d matrix]
6)
Input: SWP
[l x d matrix]; sand
and clay
[vectors of length d]
Output: VWC
[l x d matrix], sand
and clay
vectors are repeated for each row
Soil water potential in units of MPa [-Inf, 0]
.
There are six use cases:
1)
Input: VWC
[single value]; sand
and clay
[single values]
Output: SWP
[single value]
2)
Input: VWC
[single value]; sand
and clay
[vectors of length d]
Output: SWP
[vector of length d]
3)
Input: VWC
[vector of length l]; sand
and
clay
in fraction [single values]
Output: SWP
[vector of length l]
4)
Input: VWC
[vector of length l]; sand
and
clay
[vectors of length d]
Output: SWP
[l x d matrix] where VWC
is repeated for
each column
5)
Input: VWC
[l x d matrix]; sand
and clay
[single values]
Output: SWP
[l x d matrix]
6)
Input: VWC
[l x d matrix]; sand
and clay
[vectors of length d]
Output: SWP
[l x d matrix], sand
and clay
vectors are repeated for each row
either swp
or sand
/clay
needs be a
single value
either vwc
or sand
/clay
needs be a
single value
Cosby, B. J., G. M. Hornberger, R. B. Clapp, and T. R. Ginn. 1984. A statistical exploration of the relationships of soil moisture characteristics to the physical properties of soils. Water Resources Research 20:682-690.
The use of these functions is deprecated;
please use ptf_estimate()
and swrc_conversion()
instead.
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