                                                           File:  RELEASE.TXT


                      PRZM Model System Release Notes


               Center for Exposure Assessment Modeling (CEAM)
     National Exposure Research Laboratory - Ecosystems Research Division
                  Office of Research and Development (ORD)
               U.S. Environmental Protection Agency (U.S. EPA)
                          960 College Station Road
                         Athens, Georgia 30605-2700

                                706/355-8400



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Corrections and Changes Between Versions 0.00 and 1.00:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- First release: October 1992.

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Corrections and Changes Between Versions 1.00 and 1.01:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Updated and modified READ.ME file for release of version 1.01.

- Upgraded and replaced INSTALIT/MediaBuilder code and logic version 2.68/P
  with version 3.19/C.

- Increased the number of pesticide applications from 50 to 400.  This allows
  the user to simulate multiple applications per year for an extended number
  of years.  Increased the number of compartments in PRZM from 100 to 200 and
  in VADOFT from 100 to 400.  This allows the user more flexibility with
  regard to soil profile depth.

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Corrections and Changes Between Versions 1.01 and 1.02:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Modified INSTALIT/MediaBuilder PRZM2.PVD and PRZM2.INF file code and logic
  for the release and installation of version 1.02.

- READ.ME:  Updated and modified for release of version 1.02.

- USERSMAN.DOC:  Replaced all user manual *.WP WordPerfect files with
  this file.  This is the final release of the user's manual with all
  figures.

- PRZM2.RUN:  Modified file to include documentation and instruction for the
  execution of PRZM2 MONTE CARLO simulation using input data files MC.INP,
  PRZM3.INP, and VADF3.INP.

- PRZM2.EXE:  New executable task image file.

- PESTAP.FOR:  Modified FORTRAN source code file where pesticide application
  is weighted by compartment size.  Change included within file PRZM2.EXE.
  Modification transparent to user.

- INITEM.FOR, PRZECH.FOR, PRZM2.FOR:  Files that display version number and
  release date.  Updated for release of version 1.02.  Changes included
  within file PRZM2.EXE.

- MET.INP:  Deleted all 1981 records as data was incomplete.  All test data
  sets distributed with model system execute correctly with this file.

- MC.INP:  MONTE CARLO test input file added.  It can be used in conjunction
  with test input files PRZM3.INP and VADF3.INP.  Refer to PRZM2.RUN file
  for further information.

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Corrections and Changes Between Versions 1.02 and 2.00:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Wednesday, 12 October 1994.  Time: 15:08:34.

Summary:  

1)   Updated, added, and/or modified files RELEASE.TXT, UPDATE.TXT, and
     READ.ME.

2)   Composed new INSTALIT/MediaBuilder code and logic.  Upgraded INSTALIT/
     MediaBuilder product version description and INF script files from
     version 3.19c to version 5.03d.  Implemented numerous code changes to
     correct minor problems and add features/enhancements.

3)   Recompiled and relinked PRZM2 model using Lahey FORTRAN 32-bit,
     protected mode compiler, Phar-lap linker, and AIDE WDM, UTIL, and ADWDM
     libraries.  Eliminated the need for Interacter graphics libraries during
     the PRZM2 model link step.  Updated, recompiled, and rebuilt all AIDE
     library (binary) files (*.LIB) from version 2.0x to version 3.0x.

4)   Replaced compile and link DOS batch command files with Lahey make files
     for the PRZM2 model and the PRZM2/HSPF and PRZM2/WASP programs.

5)   Included new executable task image file (*.EXE) and all updated run time
     support programs and files to include FORTRAN source code for the PRZM2
     model system version 2.00.

6)   Implemented numerous FORTRAN source code changes to correct minor errors
     and/or problems that occured during program and/or model execution and
     added new features/enhancements.  For further information, refer to the
     addemdum user's manual file, PRZDOCAD.DOC.

7)   Compiled and linked the PRZM2 to HSPF and PRZM2 to WASP bridge (linkage)
     programs using Lahey FORTRAN 32-bit protected mode compiler, Phar-lap
     linker, and AIDE library (*.LIB) files.

8)   Added PRZM2 to HSPF and PRZM2 to WASP bridge (linkage) program
     executable task image files (*.EXE) and all updated run time support
     programs and files to include test input and output data, and FORTRAN
     source code files for each program.

9)   Added "Model Enhancements and Description of Bridge Programs for
     PRZM-2/HSPF and PRZM2/WASP Applications--Addendum to the Users Manual
     for Release 2.0 of the PRZM-2 Model" documentation file in WordPerfect
     (binary) format.  For further information, refer to the addemdum user's
     manual file, PRZDOCAD.DOC.

     Donigian, A.S., Jr., R.F. Carsel, J.C. Imhoff, and P.R. Hummel.  1994.
     Model Enhancements and Description of Bridge Programs for PRZM-2/HSPF
     and PRZM2/WASP Applications--Addendum to the Users Manual for Release
     2.0 of the PRZM-2 Model.  U.S. Environmental Protection Agency, Athens
     GA.  (In Preparation).

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Corrections and Changes Between Versions 2.00 and 2.01 Beta:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Summary:  

1)   Updated and modified file RELEASE.TXT.

2)   Recompiled and rebuilt AIDE library (binary) files (WDM, UTIL, and
     ADWDM) from version 3.0x using Lahey FORTRAN 32-bit, protected mode
     compiler and Phar-lap linker.

3)   Implemented FORTRAN source code changes to correct minor errors and/or
     problems that occured during model execution and added new
     features/enhancements as follows:

     a)  Date: Monday, 14 November 1994.  Time: 15:41:06.
         Increased the number of pesticide applications from 400 to 600.

     b)  Date: Tuesday, 1 August 1995.  Time: 13:06:21.
         Modified and corrected an input routine that reads an optional
         "special actions" command option within the special action
         line/field in a user specified PRZM2 input file (e.g., PRZM2.INP).
         The user specified input file is named by the user within the PRZM2
         Run Time Supervisor file (PRZM2.RUN).  With previous releases
         (version 2.00 and earlier) the user was required to left justify the
         special actions command option within an 8 character special action
         field.  The following is an example line from a user specified PRZM2
         input file.  The special actions option "KD" is left justified in
         the 8 character input field as required with version 2.00 and
         earlier releases.

  120682 KD         1     0.5
         ^      ^
         |      |
         12345678

         In the latest release (version 2.01 Beta), the user can enter a
         special actions option within a PRZM2 input file special action
         field either left justified, right justified, or at any point in
         between.  The following examples are valid with version 2.01 Beta:

  120682 KD         1     0.5
  120682    KD      1     0.5
  120682       KD   1     0.5
         ^      ^
         |      |
         12345678

         The user should consult the PRZM2 User Manual (Version 2.00) file
         (USERSMAN.DOC) for valid Special Actions commands and command line
         options and their application in the PRZM2 model system.

4)   Recompiled and relinked PRZM2 model using Lahey FORTRAN 32-bit,
     protected mode compiler, Phar-lap linker, and AIDE libraries listed
     above.

5)   Included new executable task image file (XPRZM2X.EXE).


Corrections and Changes Between Versions 2.01 and 3.12 Beta (February 1998):
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Summary:  

1)   Recompiled and rebuilt all AIDE library (binary) files (WDM, ADWDM,
     UTIL) for version 3.0x using Lahey FORTRAN 32-bit, protected mode
     compiler, and Phar-lap linker version 5.01.

2)   Created or updated PRZM model system and user support documentation
     files (refer to sub-directory README):

     READ.ME........PRZM model system general execution and user support
                    guide
     FILELIST.TXT...PRZM Model System Distribution File List
     RELEASE.TXT....PRZM Model System Release Notes
     UPDATE.TXT.....PRZM Model System Update Notes
                    (Enhancements/updates/additions not covered in user
                    manual files)
     ABSTRACT.TXT...PRZM Model System Abstract
     RESPONSE.TXT...CEAM Software Product User Response Form

3)   Updated INSTALIT/MediaBuilder code and logic for product version
     description (.PVD) and installation (.INF) script files.  Implemented
     numerous code changes to correct minor problems and add
     features/enhancements.

4)   Updated Lahey FORTRAN MAKE utility (MAKEFILE) or DOS batch command
     file(s) for the AIDE library FORTRAN source code group files, and the
     PRZM model system FORTRAN source code.

5)   Recompiled and relinked executable task image program file for the PRZM
     model, version 3.12 Beta, using Lahey FORTRAN 32-bit, protected mode
     compiler and Phar-lap linker.

6)   Included new executable task image file (XPRZM3X.EXE) and updated run
     time support programs and files.

7)   Included updated test output data files within the OUTPUT sub-directory
     to test the installation of the PRZM model.

8)   Modified and updated the following PRZM run time support programs and
     files:

     PRZM.BAT.......PRZM model execution DOS command file
     PRZMOPEN.SCR...PRZM model welcome screen file

9)   Application revisions to the PRZM model system, version 3.12 Beta, are
     included in the file UPDATE.TXT (PRZM Model System Update Notes).  This
     document is available as an ASCII text (non-binary) file in the README
     sub-directory.  Refer to file READ.ME in the README sub-directory for
     further information on the storage format and/or print/view requirements
     of this file.

10)  Included application users' manual "PRZM-3, A Model for Predicting
     Pesticide and Nitrogen Fate in the Crop Root and Unsaturated Soil Zones:
     Users Manual for Release 3.0".  This document is available as
     WordPerfect (version 6.1) documents in (binary, non-ASCII) files
     INTRO.WPD, CHAP1.WPD, CHAP2.WPD, CHAP3.WPD, CHPT4.WPD, CHAP5.WPD,
     CHPT6.WPD, CHAP7.WPD, CHAP8.WPD, CHAP9.WPD, CHAP10.WPD, and CHAP11.WPD
     within the DOCUMENT sub-directory.  Refer to file READ.ME in the README
     sub-directory for further information on the storage format and hardware
     and/or software print/view requirement(s) of the user's manual files.

11)  Summary of major scientific/application and/or operational changes:

     The following information is intended for current users of PRZM.  It is
     designed to inform users of new features and/or changes that may be
     required for existing PRZM input files to operate under the new version.

     a)  Users of PRZM2--versions 2.00 or 2.01 Beta as released and
         distributed through CEAM--should be aware that PRZM2 input files
         (e.g., .RUN, .INP, etc.) are not compatible with PRZM3 version 3.12
         Beta also released and distributed through CEAM.  The user is
         encouraged to refer to the PRZM3 User's Manual for additional
         examples and information concerning the content and storage format
         of PRZM3 input files (refer to item 10 above, file CHAP4.WPD).

     b)  Added new features/enhancements as follows:
         o Nutrient algorithms to simulate agricultural application of
           nitrogen.
         o Non uniform mixing model for chemical application and
           subsequent extraction of runoff.
         o Calculation of peak flow as function of time of concentration.
         o Assignment of regional/seasonal storm event distributions to daily
           precipitation records.
         o Three sediment erosion modules: MUSS, MUST, and MUSLE.
         o Bi-phase degradation and transformation.
         o Transformation of metabolites in solid phase.
         o Correction of exponential decay term.
         o Enhanced/expanded chemical application methods (CAM replaces FAM):
           - Surface application to soil with linear decrease with depth to
             4cm.
           - Foliar application with linear soil interception.
           - Foliar application with exponential filtration.
           - Rototiling: uniform residue distribution to user defined depth.
           - Furrow: application of residue linearly with increasing depth to
             4cm.
           - Incorporation: residue linearly decreasing with to user defined
             depth.
           - T-Band: user defined incorporation depth.
           - Shank injection: user defined incorporation depth.
         o Each pesticide application and each chemical can have a different
           CAM.
         o User defined application efficiency.
         o Farm flag to prevent application on days with precipitation.
         o Temporal changes can be made to CN, USLE, C and Manning N.
         o Number of compartments allowed increased from 200 to 500.
         o Number of applications allowed increased from 200 to 800.
         o Availability of total, dissolved, gas, and sorbed-phase
           concentrations in time series output file.
         o Ability output averages and totals of time series variables over
           specified depth increments.
         o Ability to output averages depth-weighted soil pore-water
           concentrations.
         o Ability to output center of mass and maximum incursion available
           as time series output for leaching evaluations.
         o Metabolite transfer to EXAMSII model.
         o Ability to specify drift load as transfer to EXAMS II model.
         o Transformation of chemical on foliage.
         o Temperature dependent degradation.

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