DisvNCMesh.f90

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!> @brief This module contains the MeshDisvModelModule
!!
!! This module defines UGRID layered mesh compliant netcdf
!! export type for DISV models. It is dependent on netcdf
!! libraries.
!!
!<
module meshdisvmodelmodule
 
  use kindmodule, only: dp, i4b, lgp
  use constantsmodule, only: linelength, lenbigline, lencomponentname, &
                             lenmempath
  use simvariablesmodule, only: errmsg
  use simmodule, only: store_error, store_error_filename
  use memorymanagermodule, only: mem_setptr
  use inputdefinitionmodule, only: inputparamdefinitiontype
  use characterstringmodule, only: characterstringtype
  use meshmodelmodule, only: mesh2dmodeltype, meshncdimidtype, meshncvaridtype, &
                             ncvar_chunk, ncvar_deflate, ncvar_gridmap, &
                             ncvar_mf6attr, export_varname
  use ncmodelexportmodule, only: export_longname
  use disvmodule, only: disvtype
  use netcdfcommonmodule, only: nf_verify
  use netcdf
 
  implicit none
  private
  public :: mesh2ddisvexporttype
 
  ! -- UGRID layered mesh DISV
  type, extends(mesh2dmodeltype) :: mesh2ddisvexporttype
    type(disvtype), pointer :: disv => null() !< pointer to model disv package
  contains
    procedure :: init => disv_export_init
    procedure :: destroy => disv_export_destroy
    procedure :: df
    procedure :: step
    procedure :: export_input_array
    procedure :: package_step_ilayer
    procedure :: package_step
    procedure :: export_layer_2d
    procedure :: define_dim
    procedure :: add_mesh_data
  end type mesh2ddisvexporttype
 
contains
 
  !> @brief netcdf export disv init
  !<
  subroutine disv_export_init(this, modelname, modeltype, modelfname, disenum, &
                              nctype, iout)
    use arrayhandlersmodule, only: expandarray
    class(mesh2ddisvexporttype), intent(inout) :: this
    character(len=*), intent(in) :: modelname
    character(len=*), intent(in) :: modeltype
    character(len=*), intent(in) :: modelfname
    integer(I4B), intent(in) :: disenum
    integer(I4B), intent(in) :: nctype
    integer(I4B), intent(in) :: iout
    !
    ! -- set nlay
    this%nlay = this%disv%nlay
    !
    ! allocate var_id arrays
    allocate (this%var_ids%dependent(this%nlay))
    !
    ! -- initialize base class
    call this%mesh_init(modelname, modeltype, modelfname, disenum, nctype, iout)
  end subroutine disv_export_init
 
  !> @brief netcdf export disv destroy
  !<
  subroutine disv_export_destroy(this)
    class(mesh2ddisvexporttype), intent(inout) :: this
    !
    deallocate (this%var_ids%dependent)
    !
    ! -- destroy base class
    call this%mesh_destroy()
    call this%NCModelExportType%destroy()
  end subroutine disv_export_destroy
 
  !> @brief netcdf export define
  !<
  subroutine df(this)
    use constantsmodule, only: mvalidate
    use simvariablesmodule, only: isim_mode
    class(mesh2ddisvexporttype), intent(inout) :: this
    ! -- put root group file scope attributes
    call this%add_global_att()
    ! -- define root group dimensions and coordinate variables
    call this%define_dim()
    ! -- define mesh variables
    call this%create_mesh()
    if (isim_mode /= mvalidate) then
      ! -- define the dependent variable
      call this%define_dependent()
    end if
    ! -- exit define mode
    call nf_verify(nf90_enddef(this%ncid), this%nc_fname)
    ! -- create mesh
    call this%add_mesh_data()
    ! -- define and set package input griddata
    call this%add_pkg_data()
    ! -- define and set gridmap variable
    call this%define_gridmap()
    ! -- synchronize file
    call nf_verify(nf90_sync(this%ncid), this%nc_fname)
  end subroutine df
 
  !> @brief netcdf export step
  !<
  subroutine step(this)
    use constantsmodule, only: dhnoflo
    use tdismodule, only: totim
    class(mesh2ddisvexporttype), intent(inout) :: this
    real(DP), dimension(:), pointer, contiguous :: dbl1d
    integer(I4B) :: n, k, nvals
    integer(I4B), dimension(2) :: dis_shape
    real(DP), dimension(:, :), pointer, contiguous :: dbl2d
    !
    ! -- initialize
    nullify (dbl1d)
    nullify (dbl2d)
    !
    ! -- increment step
    this%stepcnt = this%stepcnt + 1
    !
    dis_shape(1) = this%disv%ncpl
    dis_shape(2) = this%disv%nlay
    !
    nvals = product(dis_shape)
    !
    ! -- add data to dependent variable
    if (size(this%disv%nodeuser) < &
        size(this%disv%nodereduced)) then
      !
      ! -- allocate nodereduced size 1d array
      allocate (dbl1d(size(this%disv%nodereduced)))
      !
      ! -- initialize DHNOFLO for non-active cells
      dbl1d = dhnoflo
      !
      ! -- update active cells
      do n = 1, size(this%disv%nodereduced)
        if (this%disv%nodereduced(n) > 0) then
          dbl1d(n) = this%x(this%disv%nodereduced(n))
        end if
      end do
      !
      dbl2d(1:dis_shape(1), 1:dis_shape(2)) => dbl1d(1:nvals)
    else
      !
      dbl2d(1:dis_shape(1), 1:dis_shape(2)) => this%x(1:nvals)
      !
    end if
    !
    do k = 1, this%disv%nlay
      ! -- extend array with step data
      call nf_verify(nf90_put_var(this%ncid, &
                                  this%var_ids%dependent(k), dbl2d(:, k), &
                                  start=(/1, this%stepcnt/), &
                                  count=(/this%disv%ncpl, 1/)), &
                     this%nc_fname)
    end do
    !
    ! -- write to time coordinate variable
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%time, &
                                totim, start=(/this%stepcnt/)), &
                   this%nc_fname)
    !
    ! -- update file
    call nf_verify(nf90_sync(this%ncid), this%nc_fname)
    !
    ! -- cleanup
    if (associated(dbl1d)) deallocate (dbl1d)
    nullify (dbl1d)
    nullify (dbl2d)
  end subroutine step
 
  !> @brief netcdf export package dynamic input with ilayer index variable
  !<
  subroutine package_step_ilayer(this, export_pkg, ilayer_varname, ilayer)
    use constantsmodule, only: dnodata, dzero
    use tdismodule, only: kper
    use definitionselectmodule, only: get_param_definition_type
    use ncmodelexportmodule, only: exportpackagetype
    class(mesh2ddisvexporttype), intent(inout) :: this
    class(exportpackagetype), pointer, intent(in) :: export_pkg
    character(len=*), intent(in) :: ilayer_varname
    integer(I4B), intent(in) :: ilayer
    ! -- local
    type(inputparamdefinitiontype), pointer :: idt
    integer(I4B), dimension(:), pointer, contiguous :: int1d
    real(DP), dimension(:), pointer, contiguous :: dbl1d
    real(DP), dimension(:, :), pointer, contiguous :: dbl2d
    integer(I4B), dimension(:), pointer, contiguous :: ialayer
    real(DP), dimension(:), contiguous, pointer :: dbl1d_ptr
    character(len=LINELENGTH) :: nc_varname, input_attr
    integer(I4B) :: n, iparam, nvals
    logical(LGP) :: ilayer_read
    !
    ! -- initialize
    nullify (ialayer)
    ilayer_read = .false.
    !
    ! --  set pointer to ilayer variable
    call mem_setptr(ialayer, export_pkg%param_names(ilayer), &
                    export_pkg%mf6_input%mempath)
    !
    ! -- check if layer index variable was read
    if (export_pkg%param_reads(ilayer)%invar == 1) then
      ilayer_read = .true.
    end if
    !
    ! -- export defined period input
    do iparam = 1, export_pkg%nparam
      !
      ! -- check if variable was read this period
      if (export_pkg%param_reads(iparam)%invar < 1) cycle
      !
      ! -- set input definition
      idt => &
        get_param_definition_type(export_pkg%mf6_input%param_dfns, &
                                  export_pkg%mf6_input%component_type, &
                                  export_pkg%mf6_input%subcomponent_type, &
                                  'PERIOD', export_pkg%param_names(iparam), '')
      !
      ! -- set variable name and input string
      nc_varname = trim(export_pkg%mf6_input%subcomponent_name)//'_'// &
                   trim(idt%mf6varname)
      input_attr = this%input_attribute(export_pkg%mf6_input%subcomponent_name, &
                                        idt)
      !
      ! -- export arrays
      select case (idt%datatype)
      case ('INTEGER1D')
        call mem_setptr(int1d, idt%mf6varname, export_pkg%mf6_input%mempath)
        call nc_export_int1d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                             int1d, nc_varname, &
                             export_pkg%mf6_input%subcomponent_name, &
                             idt%tagname, this%gridmap_name, idt%shape, &
                             idt%longname, input_attr, this%deflate, &
                             this%shuffle, this%chunk_face, kper, this%nc_fname)
      case ('DOUBLE1D')
        call mem_setptr(dbl1d, idt%mf6varname, export_pkg%mf6_input%mempath)
        call this%export_layer_2d(export_pkg, idt, ilayer_read, ialayer, &
                                  dbl1d, nc_varname, input_attr)
      case ('DOUBLE2D')
        call mem_setptr(dbl2d, idt%mf6varname, export_pkg%mf6_input%mempath)
        nvals = this%disv%ncpl
        !
        do n = 1, size(dbl2d, dim=1) !naux
          dbl1d_ptr(1:nvals) => dbl2d(n, :)
          if (all(dbl1d_ptr == dzero)) then
          else
            call this%export_layer_2d(export_pkg, idt, ilayer_read, ialayer, &
                                      dbl1d_ptr, nc_varname, input_attr, n)
          end if
        end do
      case default
        !
        errmsg = 'EXPORT ilayer unsupported datatype='//trim(idt%datatype)
        call store_error(errmsg, .true.)
      end select
    end do
    !
    ! -- synchronize file
    call nf_verify(nf90_sync(this%ncid), this%nc_fname)
    !
    ! -- return
    return
  end subroutine package_step_ilayer
 
  !> @brief netcdf export package dynamic input
  !<
  subroutine package_step(this, export_pkg)
    use ncmodelexportmodule, only: exportpackagetype
    class(mesh2ddisvexporttype), intent(inout) :: this
    class(exportpackagetype), pointer, intent(in) :: export_pkg
    errmsg = 'NetCDF period export not supported for model='// &
             trim(this%modelname)//', package='// &
             trim(export_pkg%mf6_input%subcomponent_name)
    call store_error(errmsg, .true.)
    !
    ! -- synchronize file
    call nf_verify(nf90_sync(this%ncid), this%nc_fname)
  end subroutine package_step
 
  !> @brief export layer variable as full grid
  !<
  subroutine export_layer_2d(this, export_pkg, idt, ilayer_read, ialayer, &
                             dbl1d, nc_varname, input_attr, iaux)
    use constantsmodule, only: dnodata, dzero
    use ncmodelexportmodule, only: exportpackagetype
    class(mesh2ddisvexporttype), intent(inout) :: this
    class(exportpackagetype), pointer, intent(in) :: export_pkg
    type(inputparamdefinitiontype), pointer, intent(in) :: idt
    logical(LGP), intent(in) :: ilayer_read
    integer(I4B), dimension(:), pointer, contiguous, intent(in) :: ialayer
    real(DP), dimension(:), pointer, contiguous, intent(in) :: dbl1d
    character(len=*), intent(in) :: nc_varname
    character(len=*), intent(in) :: input_attr
    integer(I4B), optional, intent(in) :: iaux
    ! -- local
    real(DP), dimension(:, :), pointer, contiguous :: dbl2d
    integer(I4B) :: n, j, k, idxaux
    !
    ! -- initialize
    idxaux = 0
    if (present(iaux)) then
      idxaux = iaux
    end if
 
    allocate (dbl2d(export_pkg%mshape(2), export_pkg%mshape(1)))
    !
    if (ilayer_read) then
      do k = 1, size(dbl2d, dim=2)
        n = 0
        do j = 1, size(dbl2d, dim=1)
          n = n + 1
          if (ialayer(n) == k) then
            dbl2d(j, k) = dbl1d(n)
          else
            dbl2d(j, k) = dnodata
          end if
        end do
      end do
    else
      dbl2d = dnodata
      dbl2d(:, 1) = dbl1d(:)
    end if
    !
    call nc_export_dbl2d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                         dbl2d, nc_varname, &
                         export_pkg%mf6_input%subcomponent_name, idt%tagname, &
                         this%gridmap_name, idt%shape, idt%longname, input_attr, &
                         this%deflate, this%shuffle, this%chunk_face, &
                         export_pkg%iper, idxaux, this%nc_fname)
    !
    deallocate (dbl2d)
  end subroutine export_layer_2d
 
  !> @brief netcdf export an input array
  !<
  subroutine export_input_array(this, pkgtype, pkgname, mempath, idt)
    class(mesh2ddisvexporttype), intent(inout) :: this
    character(len=*), intent(in) :: pkgtype
    character(len=*), intent(in) :: pkgname
    character(len=*), intent(in) :: mempath
    type(inputparamdefinitiontype), pointer, intent(in) :: idt
    integer(I4B), dimension(:), pointer, contiguous :: int1d
    integer(I4B), dimension(:, :), pointer, contiguous :: int2d
    real(DP), dimension(:), pointer, contiguous :: dbl1d
    real(DP), dimension(:, :), pointer, contiguous :: dbl2d
    character(len=LINELENGTH) :: nc_varname, input_attr
    integer(I4B) :: iper, iaux
    !
    iper = 0
    iaux = 0
    !
    ! -- set package base name
    nc_varname = trim(pkgname)//'_'//trim(idt%mf6varname)
    ! -- put input attributes
    input_attr = this%input_attribute(pkgname, idt)
    !
    select case (idt%datatype)
    case ('INTEGER1D')
      call mem_setptr(int1d, idt%mf6varname, mempath)
      call nc_export_int1d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                           int1d, nc_varname, pkgname, idt%tagname, &
                           this%gridmap_name, idt%shape, idt%longname, &
                           input_attr, this%deflate, this%shuffle, &
                           this%chunk_face, iper, this%nc_fname)
    case ('INTEGER2D')
      call mem_setptr(int2d, idt%mf6varname, mempath)
      call nc_export_int2d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                           int2d, nc_varname, pkgname, idt%tagname, &
                           this%gridmap_name, idt%shape, idt%longname, &
                           input_attr, this%deflate, this%shuffle, &
                           this%chunk_face, this%nc_fname)
    case ('DOUBLE1D')
      call mem_setptr(dbl1d, idt%mf6varname, mempath)
      call nc_export_dbl1d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                           dbl1d, nc_varname, pkgname, idt%tagname, &
                           this%gridmap_name, idt%shape, idt%longname, &
                           input_attr, this%deflate, this%shuffle, &
                           this%chunk_face, this%nc_fname)
    case ('DOUBLE2D')
      call mem_setptr(dbl2d, idt%mf6varname, mempath)
      call nc_export_dbl2d(this%ncid, this%dim_ids, this%var_ids, this%disv, &
                           dbl2d, nc_varname, pkgname, idt%tagname, &
                           this%gridmap_name, idt%shape, idt%longname, &
                           input_attr, this%deflate, this%shuffle, &
                           this%chunk_face, iper, iaux, this%nc_fname)
    case default
      ! -- no-op, no other datatypes exported
    end select
  end subroutine export_input_array
 
  !> @brief netcdf export define dimensions
  !<
  subroutine define_dim(this)
    use constantsmodule, only: mvalidate
    use simvariablesmodule, only: isim_mode
    class(mesh2ddisvexporttype), intent(inout) :: this
    integer(I4B), dimension(:), contiguous, pointer :: ncvert
    !
    ! -- set pointers to input context
    call mem_setptr(ncvert, 'NCVERT', this%dis_mempath)
    !
    ! -- time
    if (isim_mode /= mvalidate) then
      call nf_verify(nf90_def_dim(this%ncid, 'time', this%totnstp, &
                                  this%dim_ids%time), this%nc_fname)
      call nf_verify(nf90_def_var(this%ncid, 'time', nf90_double, &
                                  this%dim_ids%time, this%var_ids%time), &
                     this%nc_fname)
      call nf_verify(nf90_put_att(this%ncid, this%var_ids%time, 'calendar', &
                                  'standard'), this%nc_fname)
      call nf_verify(nf90_put_att(this%ncid, this%var_ids%time, 'units', &
                                  this%datetime), this%nc_fname)
      call nf_verify(nf90_put_att(this%ncid, this%var_ids%time, 'axis', 'T'), &
                     this%nc_fname)
      call nf_verify(nf90_put_att(this%ncid, this%var_ids%time, 'standard_name', &
                                  'time'), this%nc_fname)
      call nf_verify(nf90_put_att(this%ncid, this%var_ids%time, 'long_name', &
                                  'time'), this%nc_fname)
    end if
    !
    ! -- mesh
    call nf_verify(nf90_def_dim(this%ncid, 'nmesh_node', this%disv%nvert, &
                                this%dim_ids%nmesh_node), this%nc_fname)
    call nf_verify(nf90_def_dim(this%ncid, 'nmesh_face', this%disv%ncpl, &
                                this%dim_ids%nmesh_face), this%nc_fname)
    call nf_verify(nf90_def_dim(this%ncid, 'max_nmesh_face_nodes', &
                                maxval(ncvert), &
                                this%dim_ids%max_nmesh_face_nodes), &
                   this%nc_fname)
    !
    ! -- ncpl, nlay
    call nf_verify(nf90_def_dim(this%ncid, 'nlay', this%disv%nlay, &
                                this%dim_ids%nlay), this%nc_fname)
  end subroutine define_dim
 
  !> @brief netcdf export add mesh information
  !<
  subroutine add_mesh_data(this)
    class(mesh2ddisvexporttype), intent(inout) :: this
    integer(I4B), dimension(:), contiguous, pointer :: icell2d => null()
    integer(I4B), dimension(:), contiguous, pointer :: ncvert => null()
    integer(I4B), dimension(:), contiguous, pointer :: icvert => null()
    real(DP), dimension(:), contiguous, pointer :: cell_x => null()
    real(DP), dimension(:), contiguous, pointer :: cell_y => null()
    real(DP), dimension(:), contiguous, pointer :: vert_x => null()
    real(DP), dimension(:), contiguous, pointer :: vert_y => null()
    integer(I4B) :: n, m, idx, cnt, iv, maxvert
    integer(I4B), dimension(:), allocatable :: verts
    real(DP), dimension(:), allocatable :: bnds
    integer(I4B) :: istop
    !
    ! -- set pointers to input context
    call mem_setptr(icell2d, 'ICELL2D', this%dis_mempath)
    call mem_setptr(ncvert, 'NCVERT', this%dis_mempath)
    call mem_setptr(icvert, 'ICVERT', this%dis_mempath)
    call mem_setptr(cell_x, 'XC', this%dis_mempath)
    call mem_setptr(cell_y, 'YC', this%dis_mempath)
    call mem_setptr(vert_x, 'XV', this%dis_mempath)
    call mem_setptr(vert_y, 'YV', this%dis_mempath)
    !
    ! -- initialize max vertices required to define cell
    maxvert = maxval(ncvert)
    !
    ! -- set mesh container variable value to 1
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh, 1), &
                   this%nc_fname)
    !
    ! -- allocate temporary arrays
    allocate (verts(maxvert))
    allocate (bnds(maxvert))
    !
    ! -- write node_x and node_y arrays to netcdf file
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_node_x, &
                                vert_x + this%disv%xorigin), this%nc_fname)
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_node_y, &
                                vert_y + this%disv%yorigin), this%nc_fname)
    !
    ! -- write face_x and face_y arrays to netcdf file
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_face_x, &
                                cell_x + this%disv%xorigin), this%nc_fname)
    call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_face_y, &
                                cell_y + this%disv%yorigin), this%nc_fname)
    !
    ! -- set face nodes array
    cnt = 0
    do n = 1, size(ncvert)
      verts = nf90_fill_int
      idx = cnt + ncvert(n)
      iv = 0
      istop = cnt + 1
      do m = idx, istop, -1
        cnt = cnt + 1
        iv = iv + 1
        verts(iv) = icvert(m)
      end do
      !
      ! -- write face nodes array to netcdf file
      call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_face_nodes, &
                                  verts, start=(/1, n/), &
                                  count=(/maxvert, 1/)), &
                     this%nc_fname)
      !
      ! -- set face y bounds array
      bnds = nf90_fill_double
      do m = 1, size(bnds)
        if (verts(m) /= nf90_fill_int) then
          bnds(m) = vert_y(verts(m))
        end if
        ! -- write face y bounds array to netcdf file
        call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_face_ybnds, &
                                    bnds, start=(/1, n/), &
                                    count=(/maxvert, 1/)), &
                       this%nc_fname)
      end do
      !
      ! -- set face x bounds array
      bnds = nf90_fill_double
      do m = 1, size(bnds)
        if (verts(m) /= nf90_fill_int) then
          bnds(m) = vert_x(verts(m))
        end if
        ! -- write face x bounds array to netcdf file
        call nf_verify(nf90_put_var(this%ncid, this%var_ids%mesh_face_xbnds, &
                                    bnds, start=(/1, n/), &
                                    count=(/maxvert, 1/)), &
                       this%nc_fname)
      end do
    end do
    !
    ! -- cleanup
    deallocate (bnds)
    deallocate (verts)
  end subroutine add_mesh_data
 
  !> @brief netcdf export 1D integer array
  !<
  subroutine nc_export_int1d(ncid, dim_ids, var_ids, dis, p_mem, nc_varname, &
                             pkgname, tagname, gridmap_name, shapestr, longname, &
                             nc_tag, deflate, shuffle, chunk_face, iper, nc_fname)
    integer(I4B), intent(in) :: ncid
    type(meshncdimidtype), intent(inout) :: dim_ids
    type(meshncvaridtype), intent(inout) :: var_ids
    type(disvtype), pointer, intent(in) :: dis
    integer(I4B), dimension(:), pointer, contiguous, intent(in) :: p_mem
    character(len=*), intent(in) :: nc_varname
    character(len=*), intent(in) :: pkgname
    character(len=*), intent(in) :: tagname
    character(len=*), intent(in) :: gridmap_name
    character(len=*), intent(in) :: shapestr
    character(len=*), intent(in) :: longname
    character(len=*), intent(in) :: nc_tag
    integer(I4B), intent(in) :: deflate
    integer(I4B), intent(in) :: shuffle
    integer(I4B), intent(in) :: chunk_face
    integer(I4B), intent(in) :: iper
    character(len=*), intent(in) :: nc_fname
    ! -- local
    integer(I4B), dimension(2) :: dis_shape
    integer(I4B), dimension(:, :), pointer, contiguous :: int2d
    integer(I4B) :: axis_sz, nvals, k
    integer(I4B), dimension(:), allocatable :: var_id
    character(len=LINELENGTH) :: longname_l, varname_l
    !
    if (shapestr == 'NCPL') then
      !
      ! -- set names
      varname_l = export_varname(nc_varname)
      longname_l = export_longname(longname, pkgname, tagname, layer=0, iper=iper)
      !
      allocate (var_id(1))
      axis_sz = dim_ids%nmesh_face
      !
      ! -- reenter define mode and create variable
      call nf_verify(nf90_redef(ncid), nc_fname)
      call nf_verify(nf90_def_var(ncid, varname_l, nf90_int, &
                                  (/axis_sz/), var_id(1)), &
                     nc_fname)
      !
      ! -- apply chunking parameters
      call ncvar_chunk(ncid, var_id(1), chunk_face, nc_fname)
      ! -- deflate and shuffle
      call ncvar_deflate(ncid, var_id(1), deflate, shuffle, nc_fname)
      !
      ! -- put attr
      call nf_verify(nf90_put_att(ncid, var_id(1), '_FillValue', &
                                  (/nf90_fill_int/)), nc_fname)
      call nf_verify(nf90_put_att(ncid, var_id(1), 'long_name', &
                                  longname_l), nc_fname)
      !
      ! -- add grid mapping and mf6 attr
      call ncvar_gridmap(ncid, var_id(1), gridmap_name, nc_fname)
      call ncvar_mf6attr(ncid, var_id(1), 0, iper, 0, nc_tag, nc_fname)
      !
      ! -- exit define mode and write data
      call nf_verify(nf90_enddef(ncid), nc_fname)
      call nf_verify(nf90_put_var(ncid, var_id(1), p_mem), &
                     nc_fname)
 
    else
      allocate (var_id(dis%nlay))
      !
      ! -- reenter define mode and create variable
      call nf_verify(nf90_redef(ncid), nc_fname)
      do k = 1, dis%nlay
        !
        ! -- set names
        varname_l = export_varname(nc_varname, layer=k, iper=iper)
        longname_l = export_longname(longname, pkgname, tagname, layer=k, &
                                     iper=iper)
        !
        call nf_verify(nf90_def_var(ncid, varname_l, nf90_int, &
                                    (/dim_ids%nmesh_face/), var_id(k)), &
                       nc_fname)
        !
        ! -- apply chunking parameters
        call ncvar_chunk(ncid, var_id(k), chunk_face, nc_fname)
        ! -- defalte and shuffle
        call ncvar_deflate(ncid, var_id(k), deflate, shuffle, nc_fname)
        !
        ! -- put attr
        call nf_verify(nf90_put_att(ncid, var_id(k), '_FillValue', &
                                    (/nf90_fill_int/)), nc_fname)
        call nf_verify(nf90_put_att(ncid, var_id(k), 'long_name', &
                                    longname_l), nc_fname)
        !
        ! -- add grid mapping and mf6 attr
        call ncvar_gridmap(ncid, var_id(k), gridmap_name, nc_fname)
        call ncvar_mf6attr(ncid, var_id(k), k, iper, 0, nc_tag, nc_fname)
      end do
      !
      ! -- reshape input
      dis_shape(1) = dis%ncpl
      dis_shape(2) = dis%nlay
      nvals = product(dis_shape)
      int2d(1:dis_shape(1), 1:dis_shape(2)) => p_mem(1:nvals)
      !
      ! -- exit define mode and write data
      call nf_verify(nf90_enddef(ncid), nc_fname)
      do k = 1, dis%nlay
        call nf_verify(nf90_put_var(ncid, var_id(k), int2d(:, k)), nc_fname)
      end do
      !
      ! -- cleanup
      deallocate (var_id)
    end if
  end subroutine nc_export_int1d
 
  !> @brief netcdf export 2D integer array
  !<
  subroutine nc_export_int2d(ncid, dim_ids, var_ids, disv, p_mem, nc_varname, &
                             pkgname, tagname, gridmap_name, shapestr, longname, &
                             nc_tag, deflate, shuffle, chunk_face, nc_fname)
    integer(I4B), intent(in) :: ncid
    type(meshncdimidtype), intent(inout) :: dim_ids
    type(meshncvaridtype), intent(inout) :: var_ids
    type(disvtype), pointer, intent(in) :: disv
    integer(I4B), dimension(:, :), pointer, contiguous, intent(in) :: p_mem
    character(len=*), intent(in) :: nc_varname
    character(len=*), intent(in) :: pkgname
    character(len=*), intent(in) :: tagname
    character(len=*), intent(in) :: gridmap_name
    character(len=*), intent(in) :: shapestr
    character(len=*), intent(in) :: longname
    character(len=*), intent(in) :: nc_tag
    integer(I4B), intent(in) :: deflate
    integer(I4B), intent(in) :: shuffle
    integer(I4B), intent(in) :: chunk_face
    character(len=*), intent(in) :: nc_fname
    ! -- local
    integer(I4B), dimension(:), allocatable :: var_id
    character(len=LINELENGTH) :: longname_l, varname_l
    integer(I4B) :: k
    !
    allocate (var_id(disv%nlay))
    !
    ! -- reenter define mode and create variable
    call nf_verify(nf90_redef(ncid), nc_fname)
    do k = 1, disv%nlay
      !
      ! -- set names
      varname_l = export_varname(nc_varname, layer=k)
      longname_l = export_longname(longname, pkgname, tagname, k)
      !
      call nf_verify(nf90_def_var(ncid, varname_l, nf90_int, &
                                  (/dim_ids%nmesh_face/), var_id(k)), &
                     nc_fname)
      !
      ! -- apply chunking parameters
      call ncvar_chunk(ncid, var_id(k), chunk_face, nc_fname)
      ! -- deflate and shuffle
      call ncvar_deflate(ncid, var_id(k), deflate, shuffle, nc_fname)
      !
      ! -- put attr
      call nf_verify(nf90_put_att(ncid, var_id(k), '_FillValue', &
                                  (/nf90_fill_int/)), nc_fname)
      call nf_verify(nf90_put_att(ncid, var_id(k), 'long_name', &
                                  longname_l), nc_fname)
      !
      ! -- add grid mapping and mf6 attr
      call ncvar_gridmap(ncid, var_id(k), gridmap_name, nc_fname)
      call ncvar_mf6attr(ncid, var_id(k), k, 0, 0, nc_tag, nc_fname)
    end do
    !
    ! -- exit define mode and write data
    call nf_verify(nf90_enddef(ncid), nc_fname)
    do k = 1, disv%nlay
      call nf_verify(nf90_put_var(ncid, var_id(k), p_mem(:, k)), nc_fname)
    end do
    !
    deallocate (var_id)
  end subroutine nc_export_int2d
 
  !> @brief netcdf export 1D double array
  !<
  subroutine nc_export_dbl1d(ncid, dim_ids, var_ids, dis, p_mem, nc_varname, &
                             pkgname, tagname, gridmap_name, shapestr, longname, &
                             nc_tag, deflate, shuffle, chunk_face, nc_fname)
    integer(I4B), intent(in) :: ncid
    type(meshncdimidtype), intent(inout) :: dim_ids
    type(meshncvaridtype), intent(inout) :: var_ids
    type(disvtype), pointer, intent(in) :: dis
    real(DP), dimension(:), pointer, contiguous, intent(in) :: p_mem
    character(len=*), intent(in) :: nc_varname
    character(len=*), intent(in) :: pkgname
    character(len=*), intent(in) :: tagname
    character(len=*), intent(in) :: gridmap_name
    character(len=*), intent(in) :: shapestr
    character(len=*), intent(in) :: longname
    character(len=*), intent(in) :: nc_tag
    integer(I4B), intent(in) :: deflate
    integer(I4B), intent(in) :: shuffle
    integer(I4B), intent(in) :: chunk_face
    character(len=*), intent(in) :: nc_fname
    ! -- local
    integer(I4B), dimension(2) :: dis_shape
    real(DP), dimension(:, :), pointer, contiguous :: dbl2d
    integer(I4B) :: axis_sz, nvals, k
    integer(I4B), dimension(:), allocatable :: var_id
    character(len=LINELENGTH) :: longname_l, varname_l
    !
    if (shapestr == 'NCPL') then
      !
      ! -- set names
      varname_l = export_varname(nc_varname)
      longname_l = export_longname(longname, pkgname, tagname, 0)
      !
      allocate (var_id(1))
      axis_sz = dim_ids%nmesh_face
      !
      ! -- reenter define mode and create variable
      call nf_verify(nf90_redef(ncid), nc_fname)
      call nf_verify(nf90_def_var(ncid, varname_l, nf90_double, &
                                  (/axis_sz/), var_id(1)), &
                     nc_fname)
      !
      ! -- apply chunking parameters
      call ncvar_chunk(ncid, var_id(1), chunk_face, nc_fname)
      ! -- deflate and shuffle
      call ncvar_deflate(ncid, var_id(1), deflate, shuffle, nc_fname)
      !
      ! -- put attr
      call nf_verify(nf90_put_att(ncid, var_id(1), '_FillValue', &
                                  (/nf90_fill_double/)), nc_fname)
      call nf_verify(nf90_put_att(ncid, var_id(1), 'long_name', &
                                  longname_l), nc_fname)
      !
      ! -- add grid mapping and mf6 attr
      call ncvar_gridmap(ncid, var_id(1), gridmap_name, nc_fname)
      call ncvar_mf6attr(ncid, var_id(1), 0, 0, 0, nc_tag, nc_fname)
      !
      ! -- exit define mode and write data
      call nf_verify(nf90_enddef(ncid), nc_fname)
      call nf_verify(nf90_put_var(ncid, var_id(1), p_mem), &
                     nc_fname)
 
    else
      allocate (var_id(dis%nlay))
      !
      ! -- reenter define mode and create variable
      call nf_verify(nf90_redef(ncid), nc_fname)
      do k = 1, dis%nlay
        !
        ! -- set names
        varname_l = export_varname(nc_varname, layer=k)
        longname_l = export_longname(longname, pkgname, tagname, k)
        !
        call nf_verify(nf90_def_var(ncid, varname_l, nf90_double, &
                                    (/dim_ids%nmesh_face/), var_id(k)), &
                       nc_fname)
        !
        ! -- apply chunking parameters
        call ncvar_chunk(ncid, var_id(k), chunk_face, nc_fname)
        ! -- deflate and shuffle
        call ncvar_deflate(ncid, var_id(k), deflate, shuffle, nc_fname)
        !
        ! -- put attr
        call nf_verify(nf90_put_att(ncid, var_id(k), '_FillValue', &
                                    (/nf90_fill_double/)), nc_fname)
        call nf_verify(nf90_put_att(ncid, var_id(k), 'long_name', &
                                    longname_l), nc_fname)
        !
        ! -- add grid mapping and mf6 attr
        call ncvar_gridmap(ncid, var_id(k), gridmap_name, nc_fname)
        call ncvar_mf6attr(ncid, var_id(k), k, 0, 0, nc_tag, nc_fname)
      end do
      !
      ! -- reshape input
      dis_shape(1) = dis%ncpl
      dis_shape(2) = dis%nlay
      nvals = product(dis_shape)
      dbl2d(1:dis_shape(1), 1:dis_shape(2)) => p_mem(1:nvals)
      !
      ! -- exit define mode and write data
      call nf_verify(nf90_enddef(ncid), nc_fname)
      do k = 1, dis%nlay
        call nf_verify(nf90_put_var(ncid, var_id(k), dbl2d(:, k)), nc_fname)
      end do
      !
      ! -- cleanup
      deallocate (var_id)
    end if
  end subroutine nc_export_dbl1d
 
  !> @brief netcdf export 2D double array
  !<
  subroutine nc_export_dbl2d(ncid, dim_ids, var_ids, disv, p_mem, nc_varname, &
                             pkgname, tagname, gridmap_name, shapestr, longname, &
                             nc_tag, deflate, shuffle, chunk_face, iper, iaux, &
                             nc_fname)
    use constantsmodule, only: dnodata
    integer(I4B), intent(in) :: ncid
    type(meshncdimidtype), intent(inout) :: dim_ids
    type(meshncvaridtype), intent(inout) :: var_ids
    type(disvtype), pointer, intent(in) :: disv
    real(DP), dimension(:, :), pointer, contiguous, intent(in) :: p_mem
    character(len=*), intent(in) :: nc_varname
    character(len=*), intent(in) :: pkgname
    character(len=*), intent(in) :: tagname
    character(len=*), intent(in) :: gridmap_name
    character(len=*), intent(in) :: shapestr
    character(len=*), intent(in) :: longname
    character(len=*), intent(in) :: nc_tag
    integer(I4B), intent(in) :: deflate
    integer(I4B), intent(in) :: shuffle
    integer(I4B), intent(in) :: chunk_face
    integer(I4B), intent(in) :: iper
    integer(I4B), intent(in) :: iaux
    character(len=*), intent(in) :: nc_fname
    ! -- local
    integer(I4B), dimension(:), allocatable :: var_id
    character(len=LINELENGTH) :: longname_l, varname_l
    integer(I4B) :: k
    real(DP) :: fill_value
    !
    if (iper > 0) then
      fill_value = dnodata
    else
      fill_value = nf90_fill_double
    end if
    !
    allocate (var_id(disv%nlay))
    !
    ! -- reenter define mode and create variable
    call nf_verify(nf90_redef(ncid), nc_fname)
    do k = 1, disv%nlay
      !
      ! -- set names
      varname_l = export_varname(nc_varname, layer=k, iper=iper, iaux=iaux)
      longname_l = export_longname(longname, pkgname, tagname, layer=k, iper=iper)
      !
      call nf_verify(nf90_def_var(ncid, varname_l, nf90_double, &
                                  (/dim_ids%nmesh_face/), var_id(k)), &
                     nc_fname)
      !
      ! -- apply chunking parameters
      call ncvar_chunk(ncid, var_id(k), chunk_face, nc_fname)
      ! -- deflate and shuffle
      call ncvar_deflate(ncid, var_id(k), deflate, shuffle, nc_fname)
      !
      ! -- put attr
      call nf_verify(nf90_put_att(ncid, var_id(k), '_FillValue', &
                                  (/fill_value/)), nc_fname)
      call nf_verify(nf90_put_att(ncid, var_id(k), 'long_name', &
                                  longname_l), nc_fname)
      !
      ! -- add grid mapping and mf6 attr
      call ncvar_gridmap(ncid, var_id(k), gridmap_name, nc_fname)
      call ncvar_mf6attr(ncid, var_id(k), k, iper, iaux, nc_tag, nc_fname)
    end do
    !
    ! -- exit define mode and write data
    call nf_verify(nf90_enddef(ncid), nc_fname)
    do k = 1, disv%nlay
      call nf_verify(nf90_put_var(ncid, var_id(k), p_mem(:, k)), nc_fname)
    end do
    !
    deallocate (var_id)
  end subroutine nc_export_dbl2d
 
end module meshdisvmodelmodule