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ThreepParallelModel {SoilR}

Implementation of a three pool model with parallel structure
Package: 
SoilR
Version: 
1.0-3

Description

The function creates a model for three independent (parallel) pools. It is a wrapper for the more general function ParallelModel that can handle an arbitrary number of pools.

Usage

ThreepParallelModel(t, ks, C0, In, gam1, gam2, xi = 1, solver = deSolve.lsoda.wrapper)

Arguments

t
A vector containing the points in time where the solution is sought.
ks
A vector of length 3 containing the decomposition rates for the 3 pools.
C0
A vector of length 2 containing the initial amount of carbon for the 2 pools.
In
A scalar or a data.frame object specifying the amount of litter inputs by time.
gam1
A scalar representing the partitioning coefficient, i.e. the proportion from the total amount of inputs that goes to pool 1.
gam2
A scalar representing the partitioning coefficient, i.e. the proportion from the total amount of inputs that goes to pool 2.
xi
A scalar or a data.frame specifying the external (environmental and/or edaphic) effects on decomposition rates.
solver
A function that solves the system of ODEs. This can be euler or ode or any other user provided function with the same interface.

Values

A Model Object that can be further queried

See Also

TwopParallelModel and ParallelModel

Examples

t_start=0 
t_end=10 
tn=50
timestep=(t_end-t_start)/tn 
t=seq(t_start,t_end,timestep) 
 
Ex=ThreepParallelModel(t,ks=c(k1=0.5,k2=0.2,k3=0.1),C0=c(c10=100, c20=150,c30=50),In=20,gam1=0.7,gam2=0.1,xi=0.5)
Ct=getC(Ex)
 
plot(t,rowSums(Ct),type="l",lwd=2,ylab="Carbon stocks (arbitrary units)",xlab="Time",ylim=c(0,sum(Ct[1,]))) 
lines(t,Ct[,1],col=2)
lines(t,Ct[,2],col=4)
lines(t,Ct[,3],col=3)
legend("topright",c("Total C","C in pool 1", "C in pool 2","C in pool 3"),lty=c(1,1,1,1),col=c(1,2,4,3),lwd=c(2,1,1,1),bty="n")
 
Rt=getReleaseFlux(Ex)
plot(t,rowSums(Rt),type="l",ylab="Carbon released (arbitrary units)",xlab="Time",lwd=2,ylim=c(0,sum(Rt[1,]))) 
lines(t,Rt[,1],col=2)
lines(t,Rt[,2],col=4)
lines(t,Rt[,3],col=3)
legend("topright",c("Total C release","C release from pool 1", "C release from pool 2","C release from pool 3"),lty=c(1,1,1,1),col=c(1,2,4,3),lwd=c(2,1,1,1),bty="n")

Author(s)

Carlos A. Sierra , Markus Mueller

Documentation reproduced from package SoilR, version 1.0-3. License: GPL-3