subroutine mgt_newtillmix_cswat1(jj, bmix, idtill) !! ~ ~ ~ PURPOSE ~ ~ ~ !! this subroutine mixes residue and nutrients during tillage and !! biological mixing !! New version developed by Armen R. Kemanian in collaboration with Stefan Julich and Cole Rossi !! Mixing was extended to all layers !! A subroutine to simulate stimulation of organic matter decomposition was added !! March 2009: testing has been minimal and further adjustments are expected !! use with caution and report anomalous results to akemanian@brc.tamus.edu and jeff.arnold@usda.edu !! ~ ~ ~ INCOMING VARIABLES ~ ~ ~ !! name |units |definition !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ !! npmx |none |number of different pesticides used in the simulation !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ !! ~ ~ ~ LOCAL DEFINITIONS ~ ~ ~ !! name |units |definition !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ !! ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ !! ~ ~ ~ SUBROUTINES/FUNCTIONS CALLED ~ ~ ~ !! Intrinsic: Min, Max !! ~ ~ ~ ~ ~ ~ END SPECIFICATIONS ~ ~ ~ ~ ~ ~ use tillage_data_module use basin_module use organic_mineral_mass_module use hru_module, only: tillage_days, tillage_depth, tillage_switch use soil_module use constituent_mass_module use plant_module use plant_data_module use tillage_data_module implicit none external :: mgt_tillfactor, fcgd integer, intent (in) :: jj !none |HRU number integer, intent (in) :: idtill !none |tillage type real, intent (in) :: bmix ! | real :: fcgd ! | integer :: l = 0 !none |counter integer :: npmx = 0 ! | integer :: ipl = 0 ! | integer :: lyr_exit = 0 real :: emix = 0. !none |mixing efficiency real :: dtil = 0. !mm |depth of mixing real :: frac_mixed = 0. ! | real :: frac_non_mixed = 0. ! | real, dimension(:), allocatable :: sol_mass ! |mass of the soil layer real, dimension(:), allocatable :: sol_msm ! |sol_mass mixed real, dimension(:), allocatable :: sol_msn ! |sol_mass not mixed real, dimension(:), allocatable :: frac_dep ! |fraction of soil layer in tillage depth real :: mix_clay real :: mix_silt real :: mix_sand real :: mix_sw real :: mix_rock real :: mix_bd logical :: bio_mix_event npmx = cs_db%num_pests mix_mn = mnz mix_mp = mpz mix_org%tot = orgz mix_org%rsd = orgz mix_org%hact = orgz mix_org%hsta = orgz mix_org%hs = orgz mix_org%hp = orgz mix_org%microb = orgz mix_org%str = orgz mix_org%lig = orgz mix_org%meta = orgz mix_org%man = orgz mix_org%water = orgz mix_clay = 0. mix_silt = 0. mix_sand = 0. mix_rock = 0. mix_sw = 0. mix_bd = 0. frac_mixed = 0. frac_non_mixed = 0. emix = 0. dtil = 0. mix_clay = 0. mix_silt = 0. mix_sand = 0. lyr_exit = 0 allocate (sol_mass(soil(jj)%nly), source = 0.) allocate (sol_msm(soil(jj)%nly), source = 0.) allocate (sol_msn(soil(jj)%nly), source = 0.) allocate (frac_dep(soil(jj)%nly),source = 0.) if (bmix == 0.) bio_mix_event = .false. !! tillage operation emix = tilldb(idtill)%effmix dtil = tilldb(idtill)%deptil tillage_days(jj) = 0 tillage_depth(jj) = dtil tillage_switch(jj) = 1 !!by zhang DSSAT tillage !!======================= !! incorporate pathogens - no mixing - lost from transport if (dtil > 10.) then !! incorporate pathogens end if if (dtil > 1.e-6) then do l = 1, soil(jj)%nly soil1(jj)%emix(l) = 0. enddo do l = 1, soil(jj)%nly sol_mass(l) = (soil(jj)%phys(l)%thick / 1000.) * 10000. * & soil(jj)%phys(1)%bd * 1000. * (1.- soil(jj)%phys(l)%rock/ 100.) end do !! msm = mass of soil mixed for the layer !! msn = mass of soil not mixed for the layer ! added by Armen 09/10/2010 next line only if (dtil < 10.0) dtil = 11.0 do l = 1, soil(jj)%nly if (soil(jj)%phys(l)%d <= dtil) then soil1(jj)%emix(l) = emix sol_msm(l) = emix * sol_mass(l) sol_msn(l) = sol_mass(l) - sol_msm(l) frac_dep(l) = soil(jj)%phys(l)%thick / dtil else if (soil(jj)%phys(l)%d > dtil .and. soil(jj)%phys(l-1)%d < dtil) then soil1(jj)%emix(l) = emix * ((dtil - soil(jj)%phys(l-1)%d) / soil(jj)%phys(l)%thick) sol_msm(l) = emix * sol_mass(l) * ((dtil - soil(jj)%phys(l-1)%d) / soil(jj)%phys(l)%thick) sol_msn(l) = sol_mass(l) - sol_msm(l) frac_dep(l) = (dtil - soil(jj)%phys(l-1)%d) / dtil else soil1(jj)%emix(l) = 0. sol_msm(l) = 0. soil(jj)%ly(l)%tillagef = 0. sol_msn(l) = sol_mass(l) frac_dep(l) = 0. lyr_exit = l exit end if !! calculate the mass each mixed element frac_mixed = sol_msm(l) / sol_mass(l) mix_sw = mix_sw + frac_mixed * soil(jj)%phys(l)%st mix_bd = mix_bd + frac_mixed * soil(jj)%phys(l)%bd mix_rock = mix_rock + frac_mixed * soil(jj)%phys(l)%rock * sol_mass(l) / 100. mix_sand = mix_sand + frac_mixed * soil(jj)%phys(l)%sand * sol_mass(l) / 100. mix_silt = mix_silt + frac_mixed * soil(jj)%phys(l)%silt * sol_mass(l) / 100. mix_clay = mix_clay + frac_mixed * soil(jj)%phys(l)%clay * sol_mass(l) / 100. mix_mn = mix_mn + frac_mixed * soil1(jj)%mn(l) mix_mp = mix_mp + frac_mixed * soil1(jj)%mp(l) mix_org%tot = mix_org%tot + frac_mixed * soil1(jj)%tot(l) mix_org%hact = mix_org%hact + frac_mixed * soil1(jj)%hact(l) mix_org%hsta = mix_org%hsta + frac_mixed * soil1(jj)%hsta(l) mix_org%hs = mix_org%hs + frac_mixed * soil1(jj)%hs(l) mix_org%hp = mix_org%hp + frac_mixed * soil1(jj)%hp(l) mix_org%microb = mix_org%microb + frac_mixed * soil1(jj)%microb(l) mix_org%str = mix_org%str + frac_mixed * soil1(jj)%str(l) mix_org%lig = mix_org%lig + frac_mixed * soil1(jj)%lig(l) mix_org%meta = mix_org%meta + frac_mixed * soil1(jj)%meta(l) mix_org%man = mix_org%man + frac_mixed * soil1(jj)%man(l) mix_org%water = mix_org%water + frac_mixed * soil1(jj)%water(l) !! mix each plant residue component separately do ipl = 1, pcom(jj)%npl ! sum up the amount mixed rsd in the soil from each plant in plant comunity mix_org%rsd(ipl)= mix_org%rsd(ipl) + frac_dep(l) * emix * soil1(jj)%pl(ipl)%rsd(l) ! now add the amount of surface residue that is mixed into each layer. mix_org%surf_rsd = frac_dep(l) * emix * pl_mass(jj)%rsd(ipl) mix_org%rsd(ipl)= mix_org%rsd(ipl) + mix_org%surf_rsd enddo end do do l = 1, soil(jj)%nly if(lyr_exit == l) exit ! reconstitute each soil layer frac_non_mixed = sol_msn(l) / sol_mass(l) frac_mixed = 1. - frac_non_mixed soil1(jj)%mn(l) = frac_non_mixed * soil1(jj)%mn(l) + frac_dep(l) * mix_mn soil1(jj)%mp(l) = frac_non_mixed * soil1(jj)%mp(l) + frac_dep(l) * mix_mp soil1(jj)%tot(l) = frac_non_mixed * soil1(jj)%tot(l) + frac_dep(l) * mix_org%tot !! reconstitute each soil plant residue component separately do ipl = 1, pcom(jj)%npl soil1(jj)%pl(ipl)%rsd(l) = frac_non_mixed * soil1(jj)%pl(ipl)%rsd(l) + & frac_dep(l) * mix_org%rsd(ipl) ! subtract the amount of surface residue added to the soil from the surface residue. mix_org%surf_rsd = frac_dep(l) * emix * pl_mass(jj)%rsd(ipl) pl_mass(jj)%rsd(ipl) = pl_mass(jj)%rsd(ipl) - mix_org%surf_rsd pl_mass(jj)%rsd_tot = pl_mass(jj)%rsd_tot - mix_org%surf_rsd enddo soil1(jj)%hact(l) = frac_non_mixed * soil1(jj)%hact(l) + frac_dep(l) * mix_org%hact soil1(jj)%hsta(l) = frac_non_mixed * soil1(jj)%hsta(l) + frac_dep(l) * mix_org%hsta soil1(jj)%hs(l) = frac_non_mixed * soil1(jj)%hs(l) + frac_dep(l) * mix_org%hs soil1(jj)%hp(l) = frac_non_mixed * soil1(jj)%hp(l) + frac_dep(l) * mix_org%hp soil1(jj)%microb(l) = frac_non_mixed * soil1(jj)%microb(l) + frac_dep(l) * mix_org%microb soil1(jj)%str(l) = frac_non_mixed * soil1(jj)%str(l) + frac_dep(l) * mix_org%str soil1(jj)%lig(l) = frac_non_mixed * soil1(jj)%lig(l) + frac_dep(l) * mix_org%lig soil1(jj)%meta(l) = frac_non_mixed * soil1(jj)%meta(l) + frac_dep(l) * mix_org%meta soil1(jj)%man(l) = frac_non_mixed * soil1(jj)%man(l) + frac_dep(l) * mix_org%man soil1(jj)%water(l) = frac_non_mixed * soil1(jj)%water(l) + frac_dep(l) * mix_org%water soil(jj)%phys(l)%clay = 100. / sol_mass(l) * (frac_non_mixed * soil(jj)%phys(l)%clay * sol_mass(l) / 100. & + frac_dep(l) * mix_clay) soil(jj)%phys(l)%silt = 100. / sol_mass(l) * (frac_non_mixed * soil(jj)%phys(l)%silt * sol_mass(l) / 100. & + frac_dep(l) * mix_silt) soil(jj)%phys(l)%sand = 100. / sol_mass(l) * (frac_non_mixed * soil(jj)%phys(l)%sand * sol_mass(l) / 100. & + frac_dep(l) * mix_sand) soil(jj)%phys(l)%rock = 100. / sol_mass(l) * (frac_non_mixed * soil(jj)%phys(l)%rock * sol_mass(l) / 100. & + frac_dep(l) * mix_rock) soil(jj)%phys(l)%st = frac_non_mixed * soil(jj)%phys(l)%st + frac_dep(l) * mix_sw !soil(jj)%phys(l)%bd = frac_non_mixed * soil(jj)%phys(l)%bd + frac_dep(l) * mix_bd !do k = 1, npmx ! cs_soil(jj)%ly(l)%pest(k) = cs_soil(jj)%ly(l)%pest(k) * frac_non_mixed + smix(20+k) * frac_dep(l) !end do end do call mgt_tillfactor(jj,bio_mix_event,emix,dtil) endif deallocate (sol_mass) deallocate (sol_msm) deallocate (sol_msn) deallocate (frac_dep) return end subroutine mgt_newtillmix_cswat1