AGMODELS-L: 199706XX
is the compilation of discussion during Jun 97
via AB4EL Web Digests @ SunSITE
Date: Tue, 03 Jun 1997 00:01:41 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 21 May 1997 to 2 Jun 1997
Date: Tue, 3 Jun 1997 00:01:41 -0600
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Sender: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 21 May 1997 to 2 Jun 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 3 messages totalling 93 lines in this issue.
Topics of the day:
1. Farm management optimization models (2)
2. salt leaching
Date: Mon, 2 Jun 1997 17:33:18 -0600
From: Sharyl Walker (Sew7924@SUGAR.AGE.UIUC.EDU)
Subject: Farm management optimization models
Dear Ag-modelers:
I'm looking for names and sources of farm management optimization
programs/expert systems.
Thanks for any suggestions.
-- Sharyl Walker
Sharyl E. Walker, P.E., Ph.D.
Department of Agricultural Engineering, University of Illinois
332-L, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
Date: Tue, 3 Jun 1997 09:15:19 +1000
From: Rodney Beard (R.Beard@MAILBOX.UQ.EDU.AU)
Subject: Re: Farm management optimization models
On Mon, 2 Jun 1997, Sharyl Walker wrote:
) Dear Ag-modelers:
)
) I'm looking for names and sources of farm management optimization
) programs/expert systems.
)
) Thanks for any suggestions.
)
) -- Sharyl Walker
)
Have you had a look at the CAMASE database at:
http://www.bib.wau.nl/camase/
If you do a search under agricultural economics you'll find a number of
rlevant models listed.
Regards,
Rodney Beard
------------------------------------------------
Department of Agriculture
Univerity of Queensland
St. Lucia 4072
Australia
Tel: +61 7 33652174
Webpage: http://www.uq.edu.au/agecon/rbeard.html
------------------------------------------------
Date: Mon, 2 Jun 1997 17:30:00 -0700
From: Said Amali (SaidAmali@KENNEDYJENKS.COM)
Subject: salt leaching
Sorry for cross posting.
Dear members:
I am trying to find models that will allow multi-year evaluation of salt
leaching under irrigated agriculture. We are trying to locate models
whose output allows quantification of vertical salt transport and
loading to groundwater given a soil salinity profile, irrigation
frequency and water depth, and relevant crop water use parameters. I
have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
uptake. Has anyone used these models to simulate multi-year salt
transport to groundwater under irrigation? Do you suggest other models?
Thanks.
Said Amali
Soil Scientist
Kennedy/Jenks Consultants
saidamali@kennedyjenks.com
Date: Wed, 04 Jun 1997 00:01:57 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 2 Jun 1997 to 3 Jun 1997
Date: Wed, 4 Jun 1997 00:01:57 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
Sender: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 2 Jun 1997 to 3 Jun 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 4 messages totalling 225 lines in this issue.
Topics of the day:
1. Farm management optimization models
2. salt leaching (2)
3. HUMUS interface with GIS
Date: Tue, 3 Jun 1997 08:24:47 -0600
From: "D.Hartkamp (NRG - CIMMYT, INT.)" (D.HARTKAMP@CGNET.COM)
Subject: Re: Farm management optimization models
Try the AG decisions model.
Contact Mr Gary Scneider (schneigm@agdec.com)
They have a nice software for farm management.
It has been developed particulary for the US though.
good luck
Dewi Hartkamp
CIMMYT Mexico
----------
From: Sharyl Walker[SMTP:Sew7924@SUGAR.AGE.UIUC.EDU]
Sent: Monday, June 02, 1997 5:33 PM
To: AGMODELS-L@crcvms.unl.edu
Subject: Farm management optimization models
Dear Ag-modelers:
I'm looking for names and sources of farm management optimization
programs/expert systems.
Thanks for any suggestions.
-- Sharyl Walker
Sharyl E. Walker, P.E., Ph.D.
Department of Agricultural Engineering, University of Illinois
332-L, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
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`
end
Date: Tue, 3 Jun 1997 08:43:22 -0700
From: Tom Hodges (thodges@TRICITY.WSU.EDU)
Subject: Re: salt leaching
I am not familiar with the models you are considering. However one
important consideration, in my opinion, is whether they allow using
good crop models for the crop you are interested in. The 2DSOIL and
RZWQM models are designed to have various crop models attached to
them. I am most familiar with 2DSOIL in this respect.
Tom Hodges
On Mon, 2 Jun 1997, Said Amali wrote:
) Sorry for cross posting.
)
) Dear members:
)
) I am trying to find models that will allow multi-year evaluation of salt
) leaching under irrigated agriculture. We are trying to locate models
) whose output allows quantification of vertical salt transport and
) loading to groundwater given a soil salinity profile, irrigation
) frequency and water depth, and relevant crop water use parameters. I
) have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
) relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
) uptake. Has anyone used these models to simulate multi-year salt
) transport to groundwater under irrigation? Do you suggest other models?
)
) Thanks.
)
) Said Amali
) Soil Scientist
) Kennedy/Jenks Consultants
) saidamali@kennedyjenks.com
)
Date: Tue, 3 Jun 1997 13:04:42 -0400
From: Charles Serele (95442462@CALLISTO.SI.USHERB.CA)
Subject: Re: salt leaching
Two years ago, I used the SWMS_2D to simulate multi-layer acid mine
leaching to groundwater. I know the CHEMFLO model but I'd not really
used it. I think the SWMS_2D model is convenient for the work you to do.
Good luck
Charles S.
On Mon, 2 Jun 1997, Said Amali wrote:
) Sorry for cross posting.
)
) Dear members:
)
) I am trying to find models that will allow multi-year evaluation of salt
) leaching under irrigated agriculture. We are trying to locate models
) whose output allows quantification of vertical salt transport and
) loading to groundwater given a soil salinity profile, irrigation
) frequency and water depth, and relevant crop water use parameters. I
) have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
) relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
) uptake. Has anyone used these models to simulate multi-year salt
) transport to groundwater under irrigation? Do you suggest other models?
)
) Thanks.
)
) Said Amali
) Soil Scientist
) Kennedy/Jenks Consultants
) saidamali@kennedyjenks.com
)
Date: Tue, 3 Jun 1997 17:01:57 -0600
From: "D.Hartkamp (NRG - CIMMYT, INT.)" (D.HARTKAMP@CGNET.COM)
Subject: HUMUS interface with GIS
The HUMUS (hydrologic unit model of the US) has been linked with GRASS GIS. (http://dino.wiz.uni-kassel.de/model_db/mdb/humus.html)
However no reference is given nor contact person.
Can anyone help?
Thanks
D. Hartkamp
CIMMYT Mex.
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`
end
Date: Wed, 04 Jun 1997 00:01:57 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 2 Jun 1997 to 3 Jun 1997
Date: Wed, 4 Jun 1997 00:01:57 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
Sender: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 2 Jun 1997 to 3 Jun 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 4 messages totalling 225 lines in this issue.
Topics of the day:
1. Farm management optimization models
2. salt leaching (2)
3. HUMUS interface with GIS
Date: Tue, 3 Jun 1997 08:24:47 -0600
From: "D.Hartkamp (NRG - CIMMYT, INT.)" (D.HARTKAMP@CGNET.COM)
Subject: Re: Farm management optimization models
Try the AG decisions model.
Contact Mr Gary Scneider (schneigm@agdec.com)
They have a nice software for farm management.
It has been developed particulary for the US though.
good luck
Dewi Hartkamp
CIMMYT Mexico
----------
From: Sharyl Walker[SMTP:Sew7924@SUGAR.AGE.UIUC.EDU]
Sent: Monday, June 02, 1997 5:33 PM
To: AGMODELS-L@crcvms.unl.edu
Subject: Farm management optimization models
Dear Ag-modelers:
I'm looking for names and sources of farm management optimization
programs/expert systems.
Thanks for any suggestions.
-- Sharyl Walker
Sharyl E. Walker, P.E., Ph.D.
Department of Agricultural Engineering, University of Illinois
332-L, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
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end
Date: Tue, 3 Jun 1997 08:43:22 -0700
From: Tom Hodges (thodges@TRICITY.WSU.EDU)
Subject: Re: salt leaching
I am not familiar with the models you are considering. However one
important consideration, in my opinion, is whether they allow using
good crop models for the crop you are interested in. The 2DSOIL and
RZWQM models are designed to have various crop models attached to
them. I am most familiar with 2DSOIL in this respect.
Tom Hodges
On Mon, 2 Jun 1997, Said Amali wrote:
) Sorry for cross posting.
)
) Dear members:
)
) I am trying to find models that will allow multi-year evaluation of salt
) leaching under irrigated agriculture. We are trying to locate models
) whose output allows quantification of vertical salt transport and
) loading to groundwater given a soil salinity profile, irrigation
) frequency and water depth, and relevant crop water use parameters. I
) have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
) relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
) uptake. Has anyone used these models to simulate multi-year salt
) transport to groundwater under irrigation? Do you suggest other models?
)
) Thanks.
)
) Said Amali
) Soil Scientist
) Kennedy/Jenks Consultants
) saidamali@kennedyjenks.com
)
Date: Tue, 3 Jun 1997 13:04:42 -0400
From: Charles Serele (95442462@CALLISTO.SI.USHERB.CA)
Subject: Re: salt leaching
Two years ago, I used the SWMS_2D to simulate multi-layer acid mine
leaching to groundwater. I know the CHEMFLO model but I'd not really
used it. I think the SWMS_2D model is convenient for the work you to do.
Good luck
Charles S.
On Mon, 2 Jun 1997, Said Amali wrote:
) Sorry for cross posting.
)
) Dear members:
)
) I am trying to find models that will allow multi-year evaluation of salt
) leaching under irrigated agriculture. We are trying to locate models
) whose output allows quantification of vertical salt transport and
) loading to groundwater given a soil salinity profile, irrigation
) frequency and water depth, and relevant crop water use parameters. I
) have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
) relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
) uptake. Has anyone used these models to simulate multi-year salt
) transport to groundwater under irrigation? Do you suggest other models?
)
) Thanks.
)
) Said Amali
) Soil Scientist
) Kennedy/Jenks Consultants
) saidamali@kennedyjenks.com
)
Date: Tue, 3 Jun 1997 17:01:57 -0600
From: "D.Hartkamp (NRG - CIMMYT, INT.)" (D.HARTKAMP@CGNET.COM)
Subject: HUMUS interface with GIS
The HUMUS (hydrologic unit model of the US) has been linked with GRASS GIS. (http://dino.wiz.uni-kassel.de/model_db/mdb/humus.html)
However no reference is given nor contact person.
Can anyone help?
Thanks
D. Hartkamp
CIMMYT Mex.
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end
Date: Thu, 05 Jun 1997 00:01:26 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 3 Jun 1997 to 4 Jun 1997
Date: Thu, 5 Jun 1997 00:01:26 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
Sender: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 3 Jun 1997 to 4 Jun 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 2 messages totalling 86 lines in this issue.
Topics of the day:
1. HUMUS interface with GIS
2. Simpotato Model v 1.61 (last version?)
Date: Wed, 4 Jun 1997 08:36:18 -0700
From: Tharacad Ramanarayanan (rama@BRCSUN0.TAMU.EDU)
Subject: Re: HUMUS interface with GIS
Dear Ag-Modelers:
The Hydrologic Unit Modeling of the United States is
a GIS-linked hydrologic/water quality modeling effort for the
Entire coterminous United States. It is funded by
USDA-NRCS. The GIS and modeling efforts are being carried out
at the Blackland Research Center, Temple, Texas using
USDA-ARS developed basin scale hydrologic/water quality
model SWAT (Soil Water Assessment Tool). The support for
SWAT model is rendered by ARS and Blackland Research Center. The
GRASS interface (unix only) and SWAT model (for unix and pc) can
be downloaded (anonymous ftp) from brcsun0.tamu.edu. The pc
version has a Windows interface (Windows3.1). FYI, the model and
interface are under continuous development. At this time there
is no formal arrangement for support and user requests. Nevertheless
efforts for that are underway.
Dr. R. Srinivasan (srin@brcsun2.tamu.edu) is the principal
investigator for HUMUS
Dr. Jeff Arnold (arnold@brcsun0.tamu.edu) is the principal
author of SWAT
For more information on
1. HUMUS -- http://brcserv0.tamu.edu:8000/humus
2. SWAT -- http://brcsun0.tamu.edu/swat/swat
Regards,
T.S.Ramanarayanan.
At 05:01 PM 6/3/97 -0600, "D.Hartkamp (NRG - CIMMYT, INT.)"
(D.HARTKAMP@CGNET.COM) wrote:
)The HUMUS (hydrologic unit model of the US) has been linked with GRASS
GIS. (http://dino.wiz.uni-kassel.de/model_db/mdb/humus.html)
)However no reference is given nor contact person.
)Can anyone help?
)Thanks
)D. Hartkamp
)CIMMYT Mex.
)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|~~~~~~~~~~~~~~~~~~~~~~~
T.S. Ramanarayanan, Ph.D. |Phone: (254) 770-6622
Postdoctoral Research Scientist |Fax: (254) 770-6690
Blackland Research Center | or 770-6561
808 East Blackland Road |t-ramanarayanan@tamu.edu
Temple, Texas 76502 |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Date: Wed, 4 Jun 1997 13:17:19 -0700
From: Tom Hodges (thodges@TRICITY.WSU.EDU)
Subject: Simpotato Model v 1.61 (last version?)
I have put a new version of the Simpotato model in my ftp directory
and will put in a link from my web page shortly. This version 1.61
and since the USDA has decided to close all projects at my location
it will probably be the last version.
As a result of this decision I am also looking for other employment
possibilities - situations where detailed knowledge of simulation
model development and application and extensive experience with
various cropping systems would be useful. My resume can be viewed
on my web page (see below).
The model file (sim161.zip) includes source code, executables, data,
and documentation files. It can be downloaded by ftp or via a web
browser.
ftp://ftp.tricity.wsu.edu/pub/simpotato
http://www.tricity.wsu.edu/htmls/hodges
Tom Hodges, thodges@tricity.wsu.edu
Date: Fri, 06 Jun 1997 00:00:50 -0600
From: Automatic digest processor (LISTSERV@crcvms.unl.edu)
Subject: AGMODELS-L Digest - 4 Jun 1997 to 5 Jun 1997
Date: Fri, 6 Jun 1997 00:00:50 -0600
Reply-To: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
Sender: Agmodels-L Discussion List (AGMODELS-L@CRCVMS.UNL.EDU)
From: Automatic digest processor (LISTSERV@CRCVMS.UNL.EDU)
Subject: AGMODELS-L Digest - 4 Jun 1997 to 5 Jun 1997
To: Recipients of AGMODELS-L digests (AGMODELS-L@CRCVMS.UNL.EDU)
There are 6 messages totalling 397 lines in this issue.
Topics of the day:
1. Simpotato (2)
2. Position available: Research Technologist I in Agronomy
3. Farm management optimization models (2)
4. Responses to salt transport modeling
Date: Thu, 5 Jun 1997 08:03:00 +0002
From: "Gommes, Rene (SDRN)" (Rene.Gommes@FAO.ORG)
Subject: Simpotato
The message below was just posted in AGMODELS. I thought it would be of
interest to AGROMET-L as well
R
----------------------------------------------------------------------------
------------------------------------------
I have put a new version of the Simpotato model in my ftp directory
and will put in a link from my web page shortly. This version 1.61
and since the USDA has decided to close all projects at my location
it will probably be the last version.
As a result of this decision I am also looking for other employment
possibilities - situations where detailed knowledge of simulation
model development and application and extensive experience with
various cropping systems would be useful. My resume can be viewed
on my web page (see below).
The model file (sim161.zip) includes source code, executables, data,
and documentation files. It can be downloaded by ftp or via a web
browser.
ftp://ftp.tricity.wsu.edu/pub/simpotato
http://www.tricity.wsu.edu/htmls/hodges
Tom Hodges, thodges@tricity.wsu.edu
Date: Thu, 5 Jun 1997 09:04:06 -0700
From: Paul Anderson (PAnderson@WCNETWORKS.COM)
Subject: Re: Simpotato
Please take me off this list....thank you.
))) Gommes, Rene (SDRN) (Rene.Gommes@FAO.ORG) 06/05/97 01:01AM )))
The message below was just posted in AGMODELS. I thought it would be of interest to AGROMET-L as well
R
----------------------------------------------------------------------------
------------------------------------------
I have put a new version of the Simpotato model in my ftp directory and will put in a link from my web page shortly. This version 1.61 and since the USDA has decided to close all projects at my location it will probably be the last version.
As a result of this decision I am also looking for other employment possibilities - situations where detailed knowledge of simulation model development and application and extensive experience with various cropping systems would be useful. My resume can be viewed on my web page (see below).
The model file (sim161.zip) includes source code, executables, data, and documentation files. It can be downloaded by ftp or via a web browser.
ftp://ftp.tricity.wsu.edu/pub/simpotato http://www.tricity.wsu.edu/htmls/hodges
Tom Hodges, thodges@tricity.wsu.edu
Date: Thu, 5 Jun 1997 12:10:31 -0500
From: "Dr. Bob Caldwell" (serc018@UNLVM.UNL.EDU)
Subject: Position available: Research Technologist I in Agronomy
Dear Colleagues,
I am currently recruiting for a Research Technologist (Job #37087, Dept.
of Agronomy, $21,885/yr fulltime; hard-dollar supported). The job is not a
modeling position (it includes field work and oversight of on-farm
research), though we will apply crop models to a number of research
problems, including site-specific management. The minimum qualifications are
broad (BS in "Agriculture, Geography, Computer Science, or a related
field... two years research experience"). A recent graduate with experience
in a modeling project could be a good candidate. Application for graduate
study is possible.
The closing date is soon: June 13, 1997. If you can think of anyone as a
possible nominee, please relay their name to me by E-mail or phone, and/or
pass along this message to them.
Thanks.
(p.s., Remember, I will automatically unsubscribe anyone that happens to
request that directly to agmodels-l)
Sincerely,
Bob Caldwell, Cropping Systems Specialist, Dept. of Agronomy/SEREC/NEREC
University of Nebraska - Lincoln
204 Mussehl Hall, P.O. Box 830714, Lincoln, NE 68583-0714
serc018@unlvm.unl.edu Phone: (402) 472-3674. FAX: (402) 472-3858.
Date: Thu, 5 Jun 1997 15:42:28 -0600
From: Sharyl Walker (Sew7924@SUGAR.AGE.UIUC.EDU)
Subject: Re: Farm management optimization models
) Try the AG decisions model.
) Contact Mr Gary Scneider (schneigm@agdec.com)
) They have a nice software for farm management.
Thanks for your help!
-- Sharyl Walker
Sharyl E. Walker, P.E., Ph.D.
Department of Agricultural Engineering, University of Illinois
332-L, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
Date: Thu, 5 Jun 1997 15:48:56 -0600
From: Sharyl Walker (Sew7924@SUGAR.AGE.UIUC.EDU)
Subject: Re: Farm management optimization models
)
) Have you had a look at the CAMASE database at:
)
) http://www.bib.wau.nl/camase/
)
) If you do a search under agricultural economics you'll find a number of
) rlevant models listed.
Appreciate the info! Thanks!
-- Sharyl Walker
Sharyl E. Walker, P.E., Ph.D.
Department of Agricultural Engineering, University of Illinois
332-L, A.E.S.B., 1304 W. Pennsylvania Ave., Urbana, IL 61801 USA
(217) 333-0945; sew7924@sugar.age.uiuc.edu ; FAX: (217) 244-0323
Date: Thu, 5 Jun 1997 16:16:00 -0700
From: Said Amali (SaidAmali@KENNEDYJENKS.COM)
Subject: Responses to salt transport modeling
Thank you for responding to my enquiry on salt transport models. Below
are the answers I have rec'd so far. CHEMFLO is obtained from USEPA
(EPA/600/8-89/076, August 1989), VS2DT from USGS (Water Resources
Investigations Report 83-4099 and 90-4025), SWMS_2D from US Salinity
Lab, Riverside, CA (909-369-4846)
Said.
Original Question ------------------------------------------
Dear members:
I am trying to find models that will allow multi-year evaluation of salt
leaching under irrigated agriculture. We are trying to locate models
whose output allows quantification of vertical salt transport and
loading to groundwater given a soil salinity profile, irrigation
frequency and water depth, and relevant crop water use parameters. I
have used CHEMFLO and VS2DT before and am familiar with SWMS_2D which is
relatively similar to VS2DT. Both VS2DT and SWMS_2D include plant water
uptake. Has anyone used these models to simulate multi-year salt
transport to groundwater under irrigation? Do you suggest other models?
Thanks.
Said Amali
Soil Scientist
Kennedy/Jenks Consultants
saidamali@kennedyjenks.com
Answers -------------------------------------------
Said Amali,
There's a SWMS_3D model to simulate water and solute flow in 3
dimension.
I haven't yet had a good look at it, but thought you might be
interested.
If you want the model, you can contact:
wrussell@ussl.ars.usda.gov
Everything's free with the program: source code, samples, documentation
even postage - true spirit of the Internet!
-------------------------------
Christopher Teh
Dept. Soil Sci., UPM
Said,
I forwarded your message to Dr. Mike Shannon (U.S. Salinity Lab,
Riverside, CA), Dr. Jim Rhoades (U.S. Salinity Lab), and Dr. Jim
Ayars (USDA ARS, Fresno, CA). I think one or more of them might be able
to answer your questions.
Sally Schneider
Research Plant Pathologist/Systems Engineer
USDA ARS
24106 N. Bunn Rd.
Prosser, WA 99350
509-786-9242 (voice)
509-786-9277 (fax)
Hi,
Could you please let me know how I can get these models?
Regards,
Amir
***************************************************
* Amir Fotovat *
* Soil Science Dept. *
* The University of Adelaide *
* Waite Campus *
* Adelaide SA 5064, AUSTRALIA *
* e-mail: afotovat@waite.adelaide.edu.au *
* Tel: +61 8 83036519 *
* Fax: +61 8 83036511 *
***************************************************
Said: Check with John Letey (916-787-5105) and Don Suarez at the U.S.
Salinity Lab. They both have models which can be used for multiyear
analyses. Suarez's has the full inorganic chemistry (calcite, gypsum,
and
cation exchange equilibria). John's doesn't have inorganic chemistry
which
is a limitation when calculating salt loading to underground acquifers
irrigated soils that are calcareous and gypsiferous (westside, San
Joaquin
Valley).
Dear Said:
I have a published model which could be used for the problem you
describe. It is called Opus, and in simulates the soil rootzone
profile and crop growth, water use, runoff, and chemical transport.
To simulate salt loading to groundwater, you will be in the long term
simply subtracting the plant ET and soil Evap from whatever
concentration of salt is in the irrigation water. Opus does not
explicitly include the specification of a chemical composition of
irrigated water, but you could input the right amount of chemical at
the same time as the specified irrigations, and the model would do
the rest. You can use a randomly generated weather pattern (included
in the model) if you are applying the model in the continental US, or
the model will run on measured data, or on smoothed records of mean
monthly values of temperature and radiation. For your application
you should have pretty good values for the soil hydraulic properties.
Opus runs under DOS, and the user manual and
documentation manual are available from me if you are interested.
Roger
Roger E. Smith
ARS-USDA
AERC Foothills Campus
Colorado State Univ.
Fort Collins, CO 80523
USA
roger@lily.aerc.colostate.edu
970-491-8263
FAX 970-491-8247
Dear Said
There is LEACHM, a public domain 1-d water and solute (Pesitcides,
salts, Nitrogen) transport model. If you do need a copy of the source
code please let me know I can send it to you via email. Good luck
Sincerely
Ali Fares, Ph.D.
Hydrologist/Soil Physist
University of Florida.
One of my former collegues at Oklahoma State Univ.
used LEACHM to simulate salt leaching and revap
under shallow water table conditions. I am not
sure if he published his work somewhere, but he
returned to Pakistan after finishing his PhD. He
mentione that LEACHM did a pretty good job with
multilayered salt leaching under irrigated conditions.
But LEACHM is a 1-D model.
My friend's name is Riasat Ali. His adviser
was Dr. Elliott (relliot@neusun.agen.okstate.edu).
Hope this is of some help to you.
Ramanarayanan.
I am not familiar with the models you are considering. However one
important consideration, in my opinion, is whether they allow using
good crop models for the crop you are interested in. The 2DSOIL and
RZWQM models are designed to have various crop models attached to
them. I am most familiar with 2DSOIL in this respect.
Tom Hodges
Dear Said:
Opus has been tested by several others in the movement of both
pesticides and the movement and cycling of nutrients. It has not
been "tested" specifically as a salt transport model, but the
transport is the same as for a non-degrading, non-absorbed chemical
(pesticide).
The documentation is available free while supplies last, to those
who have an appropriate application for the model.
Roger
Roger E. Smith
ARS-USDA
AERC Foothills Campus
Colorado State Univ.
Fort Collins, CO 80523
USA
roger@lily.aerc.colostate.edu
970-491-8263
FAX 970-491-8247
Two years ago, I used the SWMS_2D to simulate multi-layer acid mine
leaching to groundwater. I know the CHEMFLO model but I'd not really
used it. I think the SWMS_2D model is convenient for the work you to do.
Good luck
Charles S.
dear Said,
I am carrying out researches on hydro-geochemical processes (water flow,
solute transport, geochemical processes) and I use models.
You can contact the USDA (www.ussl.ars.usda.gov): they have develloped
several models that can be of interest for you. For example UNSATCHEM
(Simunek and Suarez, 1993).
Dutch people have developped a water flow and solute transport code:
SWAP.
Contact the WAGENINGEN University.
I hope that it can help you
Reagards,
Nicolas CONDOM
Said Amali wrote:
) Does LEACHM do salt transport under irrigated agriculture?
LEACHM can simulate sorbing and non sorbing solutes, it also can
simulate pesticides (degradation, sorption, plant uptake ...) So
obviously it can simulate salt.
I suppose
) given correct specification of the boundary conditions, one can
)simulate irrigations, but if the model is not structured to accept
)irrigations events, it may take some effort to make sure about the
)boundary conditions which may complicate efforts and take longer to
do. )I know LEACHM has been around for a while, but has it been tested
)under field conditions?
The models (leachm or vs2dt or any other model) do not diffirenciate
between rainfall and irrigation because both of them are water input
into the simulated system. Thus, leachm and Vs2dt(I worked with it too
and I modified it during my Ph.D. work to handel surface water body
adjacent to a soil surface) can handel both water input from rain and
irrigation you just have to input it into the input file correctly.
)
) The last I know is that it was under care of someone in the northeast (
) I forget the name), University of Maryland, or Massachusets or
) someplace. Are you working with any od these people, if you are can you
) also send the documantations for LEACHM? And one last item, is the model
) in an executable form already or do I have to compile it?
Leachm was developed by Hutson J.L. and R.J. Wagenet in Cornell
University, NY. Fax # for Hutson: 607-255-2644.
)
) Thank you for your help.
Prepared by Steve Modena, AB4EL
Suggestions and comments to: modena@SunSITE.unc.edu