pedotransfer: Deprecated pedotransfer functions to convert between soil...

In Burke-Lauenroth-Lab/Rsoilwat: An Ecohydrological Ecosystem-Scale Water Balance Simulation Model

Deprecated pedotransfer functions to convert between soil moisture (volumetric water content, VWC) and soil water potential (SWP)

Description

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

Usage

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, ...)

Arguments

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 [0,1].
clay	A numeric value or vector. Clay content of the soil layer(s) as fractional value in [0,1].
thetas	Soon obsolete ... (see feature_swrc)
psis	Soon obsolete ... (see feature_swrc)
b	Soon obsolete ... (see feature_swrc)
MPa_toBar	Soon obsolete ... (see feature_swrc)
bar_conversion	Soon obsolete ... (see feature_swrc)
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 feature_swrc)
...	Additional arguments.

Value

Volumetric water content in units of m^3 (of water) / m^3 (of soil) [0, 1]. There are six use cases:

1. 1)

   • Input: SWP [single value]; sand and clay [single values]

   • Output: VWC [single value]

2. 2)

   • Input: SWP [single value]; sand and clay [vectors of length d]

   • Output: VWC [vector of length d]

3. 3)

   • Input: SWP [vector of length l]; sand and clay infraction [single values]

   • Output: VWC [vector of length l]

4. 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. 5)

   • Input: SWP [l x d matrix]; sand and clay [single values]

   • Output: VWC [l x d matrix]

6. 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. 1)

   • Input: VWC [single value]; sand and clay [single values]

   • Output: SWP [single value]

2. 2)

   • Input: VWC [single value]; sand and clay [vectors of length d]

   • Output: SWP [vector of length d]

3. 3)

   • Input: VWC [vector of length l]; sand and clay in fraction [single values]

   • Output: SWP [vector of length l]

4. 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. 5)

   • Input: VWC [l x d matrix]; sand and clay [single values]

   • Output: SWP [l x d matrix]

6. 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

Note

either swp or sand/clay needs be a single value

either vwc or sand/clay needs be a single value

References

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.

See Also

The use of these functions is deprecated; please use ptf_estimate() and swrc_conversion() instead.

Burke-Lauenroth-Lab/Rsoilwat documentation built on Dec. 9, 2023, 12:41 a.m.