Archive AGMODELS-L: file log9407, part 1/1, size 41396 bytes:

------------------------------ Cut here ------------------------------

Dear Subscribers,

I am happy to announce the creation of Trickle-L, a new
mail list hosted by the listserver at University of Nebraska -
Lincoln (listserv@unl.edu). The purpose of this list is for the
unmoderated discussion of all aspects of trickle or drip
irrigation. The list owner for Trickle-L is Richard Mead
(rmead@asrr.arsusda.gov). To join Trickle-L, send email to
listserv@unl.edu with the following message:

SUB TRICKLE-L First Last

where 'First' refers to your first or given name and 'Last' your
family name. You should receive notification of your subscription
by email shortly after the listserv daemon receives your request.
If any difficulty arises please contact the list owner at the
above address.

Sincerely,
Jerome Pier
jp@unl.edu

MEETING ANNOUNCEMENT
and Call for Participants

EU/FAO
Expert Consultation on
Crop Yield Forecasting Methods

The Statistical Office of the European Union (Eurostat, Luxembourg),
the Institute for Remote Sensing Applications of the EU Joint Research
Centre (Ispra, Italy), the Directorate-General VI (Agriculture, Brussels)
and FAO (Remote Sensing Centre, Agrometeorology Group, Rome) are
jointly organizing an expert consultation on crop yield forecasting
methods.

The meeting will be held in Villefranche-sur-Mer (near Nice, in France)
from 24 to 27 October 1994. Experts of the crop yield forecasting
techniques will present their methods against a critical background
provided by agricultural statisticians from both developed and
developing countries. The total number of participants will be around
90 invited experts. Interpretation facilities are foreseen to and from
French, English and Italian.

It is planned to subdivide the meeting into 4 main sessions:

1. Areas of application, to better identify the fields where crop yield
forecasts play a major role, for instance agricultural statistics,
market planning, food early warning systems, crop insurances,
farm operations....

2. Review of methods, to better identify and assess the potential
and fields of application of the methods, from regression and
trend analysis, to agrometeorological models, remote sensing,
airborne pollen counts, carbon dioxide gradient measurement,
expert systems, artificial intelligence...

3. Case studies on some commodities which pose very specific
problems, like palm oil, forage (quality), cotton, grape vine.

4. Operational aspects of the new crop yield forecasting tools, their
integration with the standard techniques of agricultural statistics,
hardware and software requirements;

The proceedings of the meeting will constitute a state-of-the-art review
of the newer crop yield forecasting methods.

Interested individuals willing to contribute to the meeting and to
present a paper on one of the subjects of Areas of Application, Review
of Methods or Operational Aspects, are invited to contact one of the
members of the Programme Committee below before the end of July
1994.

R. Muthmann
Eurostat
Luxembourg
Fax: +352-430137318

P. Vossen
EU/JRC
Ispra, Varese, ITALY
Fax: +39-332-789074 or 789536

R. Gommes
FAO/AGRT
Fax: +39-6-52255731
E-mail: rene.gommes@fao.org

Other persons who are interested in attending the Expert Consultation are
invited to contact:

Andre Mangin
CESD-Communnautaire
Luxembourg
Fax: +352-430137316

The detailed agenda as well as the list of participants will be finalized by
mid-August; participants will be notified immediately thereafter.

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end

Dear Netters,

Here is the summary of responses to my query regarding environmental
modeling, which were extremely helpful. I have since obtained
two of the codes (PRZM and GLEAMS) from the EPA and USDA offices
listed in the postings below.

Many thanks again to all who responded or expressed interest.

Bill Glauser

---------------------------------------------------------------------------

(Original posting)

|Has anyone heard of any of the following codes:
| PRZM, GLEAMS, EXAMS, and EPIC

|They are presumably used for environmental modeling to
|assess the fate of pollutants in the environment.

|I am curious as to the models that underlie these codes.
|For example, what kinetic, thermodynamic, and transport
|models are used to determine how a compound partitions
|between the water, ground, and atmosphere?

|On a related note, what is the level of maturity of the field
|of environmental modeling (probably macroscopic)
|versus molecular modeling (microscopic)?

|Finally, where can one obtain these codes and on which platforms
|do they run?

|Thanks in advance for your help.

|Bill

---------------------------------------------------------------------------
From: bowlus@palres.dnet.sandoz.com (Steve Bowlus)

GLEAMS and PRZM (and possibly the others) are soil fate models, commonly
used in the pesticide industry for modeling runoff of pesticides from
fields. I forget the exact acronyms, but they are something like _G_round
_L_oading _E_ffect... and _P_esticide _R_oot _Z_one _M_odel. . .you can get
the drift from the names. These are transport models, which depend on the
physical properties of the materials being modeled. At this point, the
only "molecular modeling" that I have done in the systems is to evaluate
physical properties, such as partition coefficients and Henry's constants.

Try R.A. Leonard, W.G. Kinsel and D.A. Still, Transac. Am. Soc. Ag.
Engineers, vol 30 no. 5 (1987) for a description of GLEAMS.

You can get a lot more information about these models from our biologists
at our Gilroy test center: talk to Rakesh Jain or Bob Lamoreaux. We use a
program called PRE-AP, which is a front end for GLEAMS. Their number is (
408) 848-1474.

sb

---------------------------------------------------------------------------

From: Dr. Dave Winkler <D.Winkler@chem.csiro.au>

I would greatly appreciate a summary of the responses.

---------------------------------------------------------------------------

From: jim@ni-ait.co.jp (CGI Jim Jones)

Bill,

My company consults on high-level nuclear waste disposal and we are familiar
w
ith most codes related to the environment, but have not heard the four that
youme
ntion.

There are several places you might try:

Energy Science and Technology Software Center
e-mail: ESTSC@ADONIS.OSTL.GOV

phone: 703-487-4753

Let me know if you don't get what you want from those and I'll see if I can
point you to some other places.

If you do find out any information on those applications, could you let me know?

--------------------------------------------------------------------------

From: gmeier@ncsa.uiuc.edu (Gary Meier)

I've had very limited exposure to PRZM (Pesticide Root Zone Model) and
GLEAMS (Groundwater Loading Effects of Agricultural Management Systems).
The former is available from the U. S. Environmental Protection Agency
Center for Exposure Assessment Modeling (CEAM) in Athens, Georgia,
(706)-546-3549. The latter is available from the U. S. Department of
Agriculture, Agricultural Research Service. Contact J. R. Williams or C.
W. Richardson at the Grassland, Soil & Water Research Lab in Temple, Texas,
817-770-6500. As of a year ago, both programs were available without
charge (I think they want you to send them blank disks). I believe both
programs run only on IBM PCs and clones.

I don't know a lot about the models that underly the codes, but PRZM at
least permits very detailed modeling of pesticide movement in the surface
water, throught the root zone, and in the ground water. Effects of
weather, soil and crop types (including crop rotation), irrigation (if
used), pesticide application rate and timing, and a host of other
parameters are entered. Pesticide movement is calculated using daily time
steps in simulations that typically cover several years to several decades.
When I was playing with the program, a three-year simulation of low to
moderate complexity required just 3 or 4 minutes on a 25 mhz 486 PC.

I haven't had opportunity to validate the programs or do any other
comparisons to real-world results, so I can't comment on how accurate the
simulations are.

I hope you find this useful.

Gary

--------------------------------------------------------------------------

Please summarize your responses for this interesting question for the net.
Thank You.

Shawn Huston

--------------------------------------------------------------------------

From: gerson@VNET.IBM.COM (Dennis J. Gerson, Ph.D.)

Bill, all the codes you mentioned are used in groundwater or underground
reservoir modeling. The codes do have chemical knowledge thru group
function activity coefficients and fugacities (ala Aspen). The major
users of these codes are the oil companies and environmental remediation
companies. The codes all run on SGI with OpenGL, IBM RISC with OpenGL
they may support Uniras Unigraphics, thus SUN, DEC, HP and IBM.

Regards, Dennis Gerson

--------------------------------------------------------------------------

From: slee@theochem.uwaterloo.ca (Tom Slee)

Hi Bill,

I don't know any of the codes you mention. However, my impression is
that most environmental models work on a cell basis. You set up your
system as a set of cells: one cell may be a lake, one the atmosphere,
one the ground nearby, one the fish within the water, etc. (I don't
know how coarse or fine these
cells can be now). Then you set up differential equations describing
the flow of materials of interest from one cell to another (or to
nowhere in the case of degradation). These equations may be transport
equations, or may represent chemical processes: generally you will have
both physical and chemical processes affecting the distribution. Then
you solve your system of equations numerically.

There are clearly lots of approximations in this kind of model: it is
implicit that there is perfect mixing within each cell, and the
equations dramatically simplify the factors in determining the
distribution. There are also, however, lots of empirical numbers
that need to be known and typically are not. The rate of mixing of one
"cell" with another must be very dependent on site, and many other
rates are not well known, so in the end you have a very empirical
model.

This about sums up my total knowledge of the subject, so don't ask any
questions!

Tom

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U.S. Department of Agriculture
Agricultural Research Service

Supervisory Plant Physiologist/Agronomist/Soil Scientist.
ARS has a permanent position in the Systems Research
Laboratory, in Beltsville Maryland. Incumbent provides
research leadership for the development of models,
databases and expert systems; and administrative
leadership for a diverse group of scientists and support
staff. Working knowledge of crop physiology (particularly
whole plant responses to soil and areial environmental
conditions), soils, hydrology.Knowledge in agricultural
systems modeling is required. Ph.D. and research
experience in general agricultural sciences are required.
Grade Range: GS-13/14/15, salary ranging from $49,947.
to $69,427. per annum. For position information,
contact: Dr. Philip C. Kearney, Institute director,
Natural Resources Institute, Beltsville, MD 20705;
or call 301-504-7030; FAX: 301-504-6001.

i am a doctoral student working with a group doing whole farm planning, i
am looking for simulation models helping to describe the process of soil
degradation. Any insight on this matter would be most appreciated. Thank
you.
Jim Houser

Hi Agmodellers,
Is anyone involved, or know of people involved, in modelling the
effects of saline water (in the root zone) on tree growth and
consequently tree water use? We hope to incorporate (model) the presence
of a shallow, saline water table on tree growth as well as the effects
of tree water use on lowering the water table in an attempt to evaluate
the sustainability of such as system. The present fear is that trees will
concentrate salts in their root zone and subsequently stifle themselves.
I'd be interested to find out about work being conducted in this area.

Paul Feikema
Cooperative Research Centre
for Catchment Hydrology,
Department of Civil Engineering,
Monash University,
Clayton, Vic. 3168.
Australia
e-mail: feikema@eng3.eng.monash.edu.au

Anyone know of any particularly good specialists in the area of
sorption/chelation of anionic pesticides to soil? Would prefer someone in the
US, but this is not essential.

Thanks In Advance,

David Gustafson, Ph.D.
Science Fellow
Monsanto Ag Group
700 Chesterfield Pkwy N
St. Louis, MO 63198
voice:314/537-7194
fax:314/537-6134
email:digust@ccmail.monsanto.com

>Anyone know of any particularly good specialists in the area of
>sorption/chelation of anionic pesticides to soil?

Contact professor Ljerka Ukrainczyk (l_ukrain@iastate.edu) of Iowa State
Univ.'s Agronomy Dept., (515-294-5408), or Dr. David Laird
(dalaird@iastate.edu) of the National Soil Tilth Laboratory in Ames, IA
((515-294-1581).

Ricardo J. Salvador Internet: rjsalvad@iastate.edu
1126 Agronomy Hall Bitnet: a1.rjs@isumvs
Iowa State University Phone: (515) 294-9595
Ames, Iowa 50011-1010 Fax: (515) 294-8146

Hi - You can try Dr. Jerry Weber at N C State:
His area of specialty is herbicide sorption to soils.

his e-mail address is:

jweber@cropserv1.cropsci.ncsu.edu
JWEBER

Cassie Webster
cwebster@cropserv1.cropsci.ncsu.edu

Try Dr. R. Don Wauchope
USDA - ARS
Tifton, GA

don@TIFTON.CPES.PEACHNET.EDU

regards,

Ken

===========================================================================
Ken Rojas
Hydrologist / Environmental Physicist / FORTRAN GOD : Hydrology--
Great Plains System Research Unit :
USDA - Agricultural Research Service . The
301 S. Howes St. P.O. Box E . . Ecologically
Fort Collins, CO 80522 . . Correct
phone: (303) 490-8326 // fax : (303) 490-8310 . . Science
E-mail: KENR@GPSRV1.GPSR.COLOSTATE.EDU . .
ATTmail: A03KROJAS ..... aka: TECS
===========================================================================

For the purposes of writing a literature review, I am looking for
descriptions/documentation on ag. models which address nitrogen fate
and transport to either ground water or surface water. Does anyone
know where I can get information for these or other such models?:

- DM-N
- CREAMS-DM
- USD2-N

(I have contacts for RZWQM and DRAINMOD-N.)

Thanks for any advice.


-- Sharyl Walker

Sharyl E. Walker, P.E.
Department of Agricultural Engineering, University of Illinois
332-Q, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@age2.age.uiuc.edu ; FAX: (217) 244-0323

On Thu, 28 Jul 1994 06:31:22 -0500 <DIGUST@ccmail.monsanto.com> said:
>
>Anyone know of any particularly good specialists in the area of
>sorption/chelation of anionic pesticides to soil? Would prefer someone in the
>US, but this is not essential.
>
>Thanks In Advance,
>
>David Gustafson, Ph.D.
>Science Fellow
>Monsanto Ag Group
>700 Chesterfield Pkwy N
>St. Louis, MO 63198
>voice:314/537-7194
>fax:314/537-6134
>email:digust@ccmail.monsanto.com
Dave:
Let me know who you come up with. I would like to talk to him/her too! I
have had some interesting discussions on the topic with Mike Duffy at DuPont
Stine-Haskell Center; the last phone # I have for him is (302) 366-5127.

Did you attend the EMWG? Anything interesting happen?
Don Wauchope

R. DON WAUCHOPE, RESEARCH CHEMIST DON@TIFTON.CPES.PEACHNET.EDU
USDA AGRICULTURAL RESEARCH SERVICE (912) 386-3892 FAX 386-7225
POB 748, U. GA COASTAL PLAIN EXPERIMENT STATION
TIFTON, GA 31793

On Thu, 28 Jul 1994 14:57:16 -0500 Ken Rojas 303-490-8326 said:
>
>
>Try Dr. R. Don Wauchope
> USDA - ARS
> Tifton, GA
>
> don@TIFTON.CPES.PEACHNET.EDU
>
>regards,
>
>Ken
>
>
>===========================================================================
>Ken Rojas
>Hydrologist / Environmental Physicist / FORTRAN GOD : Hydrology--
>Great Plains System Research Unit :
>USDA - Agricultural Research Service . The
>301 S. Howes St. P.O. Box E . . Ecologically
>Fort Collins, CO 80522 . . Correct
>phone: (303) 490-8326 // fax : (303) 490-8310 . . Science
>E-mail: KENR@GPSRV1.GPSR.COLOSTATE.EDU . .
>ATTmail: A03KROJAS ..... aka: TECS
>===========================================================================

Dave, I've already talked to him and he doesn't have any special insights...
Don

R. DON WAUCHOPE, RESEARCH CHEMIST DON@TIFTON.CPES.PEACHNET.EDU
USDA AGRICULTURAL RESEARCH SERVICE (912) 386-3892 FAX 386-7225
POB 748, U. GA COASTAL PLAIN EXPERIMENT STATION
TIFTON, GA 31793

Try contacting,

U.Singh@CGNET.COM
and
M.Kropff@CGNET.COM

Both are at the International Rice Research Institute, Philippines.

Thomas George
International Rice Research Institute

There is a nonpoint source pollution model called Generalized Watershed
Loading Functions (GWLF) model [Haith and Shoemaker, 1987] which describes
nutrients transported by surface water and groundwater. The reference is

Haith, D.A. and Shoemaker, L.L 1987. Generalized watershed loading
functions for streamflow nutrients. Water Resources Bulletin. 23(3):
471-478.

Asking for the model, you can contact Prof. Haith, but he is on vacation
untill August 22. His email address and phone are as follows

email: dhaith@cce.cornell.edu
phone: 607-255-2802
fax : 607-255-4080

Regards,

Chingpin Tung

We also have a nonpoint source pollution model called AGNPS. This model
will calculate surface water nutrients. There is also a module that will
calculate ground-water modeling. We currently have released version
4.03. This software is available free of charge. If you would like more
information or a copy, you can E-mail or send a message to us and we will
send it out.

E-Mail: mike@soils.mrsars.usda.gov
Phone: 612-589-3411
Fax: 612-589-3787

We have also set up an anonymous FTP site. This site is still under
development, but you can retrieve the current version.

ftp to soils.mrsars.usda.gov (199.5.254.70)

USERNAME: anonymous
PASSWORD: your username@address

The AGNPS software is in directory /pub/agnps
Make sure to set the transfer to Binary by typing bin at the ftp
prompt.

The file is called agdos403.exe.

The manuals are in a file called man403.exe.
These are currently in Word Perfect Format.

There is also an information file called info403.txt.

This file is a self-extracting file. Once you have retrieved the file,
put it in the directory where you want it and type agdos403.exe. This
will cause the file to self-extract. You can then run the install
program. If you have any questions or problems, please E-Mail us.

We are currently in the process of putting the manuals on our FTP site.

We do ask that if you ftp the file from our site, that you E-mail us your
name address, phone numbers, etc. We send out a newsletter to our users,
keeping them up to date on new developments, new versions of software,
how other users are using AGNPS.

If you have any other questions, problems, or suggestions please give us
a call or send us an E-mail message.

Thanks
Mike Koehler (AGNPS Support)

Mike

I will be grateful if you send me the current version of AGNPS. I worked with
the very first version 4 years ago and found it to be very useful.

My address:

Neba Ambe
Gricultural Engineering Dept.
Michigan State University
East Lansing, MI 48224.
Phone: 517 355-4496.

My appreciation

neba

> > We also
have a nonpoint source pollution model called AGNPS. This model
> will calculate surface water nutrients. There is also a module that will
> calculate ground-water modeling. We currently have released version
> 4.03. This software is available free of charge. If you would like more
> information or a copy, you can E-mail or send a message to us and we will
> send it out.
>
> E-Mail: mike@soils.mrsars.usda.gov
> Phone: 612-589-3411
> Fax: 612-589-3787
>
>
> We have also set up an anonymous FTP site. This site is still under
> development, but you can retrieve the current version.
>
> ftp to soils.mrsars.usda.gov (199.5.254.70)
>
> USERNAME: anonymous
> PASSWORD: your username@address
>
> The AGNPS software is in directory /pub/agnps
> Make sure to set the transfer to Binary by typing bin at the ftp
> prompt.
>
> The file is called agdos403.exe.
>
> The manuals are in a file called man403.exe.
> These are currently in Word Perfect Format.
>
> There is also an information file called info403.txt.
>
>
> This file is a self-extracting file. Once you have retrieved the file,
> put it in the directory where you want it and type agdos403.exe. This
> will cause the file to self-extract. You can then run the install
> program. If you have any questions or problems, please E-Mail us.
>
> We are currently in the process of putting the manuals on our FTP site.
>
> We do ask that if you ftp the file from our site, that you E-mail us your
> name address, phone numbers, etc. We send out a newsletter to our users,
> keeping them up to date on new developments, new versions of software,
> how other users are using AGNPS.
>
> If you have any other questions, problems, or suggestions please give us
> a call or send us an E-mail message.
>
>
> Thanks
> Mike Koehler (AGNPS Support)
>
>
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