MakeRelRootDens: Generates a root density depth function the soil layers'...

In pschmidtwalter/brook90r: Run the LWF-Brook90 hydrological model from within R.

Description

Generates a root density depth function the soil layers' lower depth limits

Usage

MakeRelRootDens(soilnodes, maxrootdepth = min(soilnodes),
  method = "betamodel", beta = 0.97, relrootden = NULL,
  rootdepths = NULL)

Arguments

soilnodes	vector of lower soil layer depth limits, for which the relative root distribution will be calculated.
maxrootdepth	the maximum rooting depth (m, negative downwards) below which relative root length density will be set to zero
method	method name for the root depth distribution. 'betamodel' uses the model after Gale & Grigal, 'table' interpolates the value pairs of 'rootdepths' and 'relrootden' to 'soilnodes'. 'linear' returns linearly decreasing root densities with the maximum value (taken from the first vector element of 'relrootden') at the uppermost layer to 0 at 'maxrootdepth'. 'constant' returns a uniform root distribution with depth corresponding to the first vector element of 'relrootden' and 0 below 'maxrootdepth'.
beta	parameter(s) of the root distribution function
relrootden	vector of relative root densities
rootdepths	vector of lower depths limit, corresponding to 'relrootden'

Value

vector of relative rootlength, corresponding to soilnodes

Examples

MakeRelRootDens(soilnodes = seq(0,-2, by = -0.01),
method = "betamodel",
beta = 0.93)

MakeRelRootDens(soilnodes = soil_slb1$lower,
maxrootdepth = -1.4,
method = "linear",
relrootden = 0.2)

MakeRelRootDens(soilnodes = soil_slb1$lower,
maxrootdepth = -1.4,
method = "table",
relrootden = rootden_slb1$rootden,
rootdepths = rootden_slb1$depth)

pschmidtwalter/brook90r documentation built on April 6, 2020, 6:35 p.m.