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      subroutine dlwq52 ( nosys  , notot  , noseg  , volume , amass  ,
     &                    conc2  , conc   , owners , mypart )

!     Deltares Software Centre

!>\File
!>           Makes masses and concentrations after the flux correction step

!     Created:    april 1988 by L.Postma

!     Logical unitnumbers : none

!     Subroutines called  : none

      use timers

      implicit none

!     Parameters          :

!     type     kind  function         name                      description

      integer   (4), intent(in   ) :: nosys                   !< number of transported substances
      integer   (4), intent(in   ) :: notot                   !< total number of substances
      integer   (4), intent(in   ) :: noseg                   !< number of computational volumes
      real      (4), intent(inout) :: volume(noseg )          !< volumes of the segments
      real      (4), intent(inout) :: amass (notot ,noseg)    !< masses per substance per volume
      real      (4), intent(in   ) :: conc2 (notot ,noseg)    !< concentrations per substance per volume
      real      (4), intent(  out) :: conc  (notot ,noseg)    !< concentrations per substance per volume
      integer   (4), intent(in   ) :: owners(noseg )          !< ownership array for segments
      integer   (4), intent(in   ) :: mypart                  !< number of the current subdomain

!     local variables

      integer(4)          isys            ! loopcounter substances
      integer(4)          iseg            ! loopcounter computational volumes
      real   (4)          vol             ! helpvariable for this volume
      integer(4), save :: ithandl         ! timer handle
      data       ithandl /0/
      if ( timon ) call timstrt ( "dlwq52", ithandl )

!         loop accross the number of computational elements

      do iseg = 1, noseg
         if (owners(iseg).eq.mypart) then
            vol = volume(iseg)
            do isys = 1, nosys
               conc (isys,iseg) = conc2(isys,iseg)
               amass(isys,iseg) = conc2(isys,iseg)*vol
            enddo
            do isys = nosys+1, notot
               conc (isys,iseg) = conc2(isys,iseg)
            enddo
         endif
      enddo

      if ( timon ) call timstop ( ithandl )

      return
      end