subroutine wrisub ( lu )

      include 'data.inc'
      integer     i, lu, iitem

c     ITEMS with defined ITEMGR are substances

          do i = 1,nitem
	    if (itemgr(i).ne.'') then
	        if (itemwk(i).eq.'x') then
      	        write (lu,1000) 
     j        trim(itemid(i)),trim(itemnm(i)),trim(itemun(i))
	        else
      	        write (lu,1010) 
     j        trim(itemid(i)),trim(itemnm(i)),trim(itemun(i))
	        endif
	    endif
	    enddo

c     ITEMS with undefined ITEMGR and defined ITEMDE are input

          do i = 1,nitem
	    if (itemgr(i).eq.''.and.itemde(i).ne.-999.) then
    	        write (lu,1020) 
     j  trim(itemid(i)),trim(itemnm(i)),trim(itemun(i)),itemde(i)
	    endif
	    enddo

	    do i = 1,noutp
	        call zoek (outpit(i),nitem,itemid,10,iitem)
              if (iitem.le.0) stop 'Bug 17-01-2011'
	        write (lu,1030) trim(outpit(i)), trim(itemnm(iitem))
	    enddo

	    write (lu,1040) 
	    write (lu,1041) (trim(procid(i)),trim(procnm(i)),i=1,nproc)
	    write (lu,1043) 


 1000 format ('substance ''',a,''' active'/
     j        '   description        ''',a,''''/
     j        '   concentration-unit ''',a,''''/
     j        '   waste-load-unit    ''-'''/
     j        'end-substance')
 1010 format ('substance ''',a,''' inactive'/
     j        '   description        ''',a,''''/
     j        '   concentration-unit ''',a,''''/
     j        '   waste-load-unit    ''-'''/
     j        'end-substance')
 1020 format ('parameter ''',a,''''/
     j        '   description   ''',a,''''/
     j        '   unit          ''',a,''''/
     j        '   value          ',g15.7/
     j        'end-parameter')
 1030 format ('output ''',a,''''/
     j        '   description   ''',a,''''/
     j        'end-output')
 1040 format ('active-processes')
 1041 format ('   name  ''',a,''' ''',a,'''')
 1043 format ('end-active-processes')


      return
      end