cbn_rsd_decomp Subroutine

subroutine cbn_rsd_decomp()

Uses

  • proc~~cbn_rsd_decomp~~UsesGraph proc~cbn_rsd_decomp cbn_rsd_decomp module~basin_module basin_module proc~cbn_rsd_decomp->module~basin_module module~hru_module hru_module proc~cbn_rsd_decomp->module~hru_module module~organic_mineral_mass_module organic_mineral_mass_module proc~cbn_rsd_decomp->module~organic_mineral_mass_module module~output_landscape_module output_landscape_module proc~cbn_rsd_decomp->module~output_landscape_module module~plant_data_module plant_data_module proc~cbn_rsd_decomp->module~plant_data_module module~plant_module plant_module proc~cbn_rsd_decomp->module~plant_module module~septic_data_module septic_data_module proc~cbn_rsd_decomp->module~septic_data_module module~soil_module soil_module proc~cbn_rsd_decomp->module~soil_module module~carbon_module carbon_module module~organic_mineral_mass_module->module~carbon_module module~soil_module->module~carbon_module 
~ ~ ~ PURPOSE ~ ~ ~
this subroutine estimates daily nitrogen and phosphorus
mineralization and immobilization considering fresh organic
material (plant residue) and active and stable humus material

~ ~ ~ INCOMING VARIABLES ~ ~ ~
name          |units         |definition
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
ihru          |none          |HRU number
rsdco_pl(:)   |none          |plant residue decomposition coefficient. The
                             |fraction of residue which will decompose in
                             |a day assuming optimal moisture,
                             |temperature, C:N ratio, and C:P ratio

! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ OUTGOING VARIABLES ~ ~ ~
name          |units         |definition
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ LOCAL DEFINITIONS ~ ~ ~
name        |units         |definition
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

~ ~ ~ SUBROUTINES/FUNCTIONS CALLED ~ ~ ~
Intrinsic: Max, Exp, Sqrt, Min, Abs

~ ~ ~ ~ ~ ~ END SPECIFICATIONS ~ ~ ~ ~ ~ ~

compute root and incorporated residue decomposition compute humus mineralization of organic soil pools mineralization can occur only if temp above 0 deg compute soil water factor compute soil temperature factor compute combined factor compute residue decomp and mineralization of fresh organic n and p (upper two layers only) add mass and carbon to soil organic pools add nitrogen and phosphorus to soil organic pools - assume c/n and c/p ratios c/n=10 for metabolic and 150 for structural; c/p=100 for metabolic and 1500 for structural solve ntot = nmeta + nstr & nmet = 15.* nstr * cmet/cstr

Arguments

None