From root@crcnis1.unl.edu Sun Aug 20 08:59 EDT 1995
Date: Sun, 20 Aug 1995 07:51:41 -0500
Message-Id: <9508201258.AA03772@sunsite.oit.unc.edu>
From: listserv@unl.edu
Subject: GET AGMODELS-L LOG9506

Archive AGMODELS-L: file log9506, part 1/1, size 39630 bytes:

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From takakura@ag.Arizona.EDU Thu Jun 1 05:23:26 1995
Date: Thu, 1 Jun 1995 12:23:26 -0700 (MST)
From: "T. Takakura" <takakura@ag.Arizona.EDU>
Subject: Introduction myself
Message-Id: <Pine.SOL.3.91.950601121729.27255A-100000@ag.arizona.edu>

My name is Tadashi Takakura, Professor of Ag. Eng. Dept, Univ. of Tokyo
and adjunct members of both Rutgers Univ. and Univ. of Arizona where I am
staying right now. I wrote a book "Climate under Cover" published from
Kluwer Academic Pul., Holland and greenhouse models in CSMP are
described. I worked with Prof. de Wit group 20 years ago and am still
working on simulation of plants and their related matters such as
greenhouse environment.



From LXAZBURTONR@CLUSTER.NORTH-LONDON.AC.UK Mon Jun 5 03:18:48 1995
Message-Id: <199506050818.AA19833@crcnis1.unl.edu>
Date: Mon, 5 Jun 95 9:24 BST
From: LXAZBURTONR@CLUSTER.NORTH-LONDON.AC.UK
Subject: Unsubscribe

Unsubscribe



From GRUSSELL@srv0.bio.ed.ac.uk Sun Jun 4 11:10:09 1995
From: Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>
Date: Sun, 4 Jun 1995 11:10:09 +0000
Subject: Re: Andosols
Message-Id: <59E0FB15787@srv0.bio.ed.ac.uk>

Thanks to everyone who sent me information about andosols.
it was much appreciated.
Graham

Dr G. Russell
University of Edinburgh
Institute of Ecology & Resource Management (Agriculture Building)
West Mains Road
Edinburgh EH9 3JG
SCOTLAND
International phone +44 131 535 4063 Fax +44 131 667 2601
UK phone 031 535 4063 Fax 031 667 2601


From PSmoke@aol.com Mon Jun 5 17:20:24 1995
Date: Mon, 5 Jun 1995 21:20:24 -0400
From: PSmoke@aol.com
Message-Id: <950605212022_87373389@aol.com>
Subject: Unsubscribe

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From WWALLACE@terra.colostate.edu Tue Jun 13 15:49:05 1995
From: "Bill Wallace" <WWALLACE@terra.colostate.edu>
Date: Tue, 13 Jun 1995 15:49:05 GMT-0600
Subject: Model Documentation Help
Message-Id: <28C7A62035F@terra.colostate.edu>

Hi,

My name is Bill Wallace. I work for CIESIN (Consortium for International Earth
Science Information Network at the TERRA (Terrestrial Ecosystems Regioonal
Research and Analysis ) Laboratory in Fort Collins, CO, USA.

I am working on a project to document information about a wide range of
models either developed or in use by US Department of Agriculture agencies. To
date 105 models have been documented. Results of the model documentation
efforts can be seen on the World Wide Web at URL http://forte.poly.edu:3333/.

I need to determine points of contact for the following models in order to
document information about the model. I would greatly appreciate any help you
can give me in locating a source of information about the models. Phone
number and or e-mail would be greatly appreciated, but a name and a lst-know
location would certainly be of help.

SOIL models:

2DSOIL
ROOTSIMU
YASEQL soil equilibrium model
NUCM (Nutrient Cycling Model)

PEST Models:

Black Cutworm Development Model
Cornell Pesticide Model (CPM)
Potato Leafroll Virus (PLRV) Model

CROP Models:

Coton Production Model
PHYGROW (plant growth model)
SIMPOTATO
Winter Wheat Model

HYDROLOGIC MODELS:

CREAMS (Chemical, runoff, and erosion for Agricultural management Systems)
DRAINMOD
GWLF
H20TRANS
PROSPER
SWAM (small watershed model)
SWAT
SWRRB
SWRRBWQ
SPAW (Soil, Plant, Atmosphere, Water)

OTHER:

AGSIM
NSWERS
BIOME CLIGEN
CPS (Conservation Production System)
ROTO
SEQDRV
SIMCYST
SLAM
STOCKPOL
SYRUP
WIN-HUSTLE

If you look at the World Wide Web page, I would also appreciate any comments
you have concerning the model information. Thanks for your help!

Bill Wallace



From T.Mavromatis@uea.ac.uk Wed Jun 14 06:49:14 1995
Date: Wed, 14 Jun 1995 12:55:16 BST
From: "T.MAVROMATIS" <T.Mavromatis@uea.ac.uk>
Message-Id: <00991DDE.8F677E40.3546@cpcmg.uea.ac.uk>
Subject: CROP DATA REQUSET FOR FRANCE

Hi all,

I would like to introduce myself as a new subscriber to this list. I am a
Ph.D student working at the Climatic Research Unit at the University of East
Anglia with Dr. P.D.Jones. For my thesis I am studying the impacts of climate
change on wheat through the use of crop climate models. A major part of my
research would be the application of AFRCWHEAT2, CERES-Wheat and EPIC in
france.
I am interested in particular for experimental sites close or in the following
areas in South Central France

Maine-te-Loire Sarthe
Indre-et-Loire Loiret
Cher Yonne
Vienne

I wasn't able so far to find any crop/management/soil data required by the
models so any help /information for any possible source of data would be
greatly appreciated.

Theodoros Mavromatis


From GRUSSELL@srv0.bio.ed.ac.uk Wed Jun 14 13:30:24 1995
From: Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>
Date: Wed, 14 Jun 1995 13:30:24 +0000
Subject: Re: CROP DATA REQUSET FOR FRANCE
Message-Id: <6906D2C550E@srv0.bio.ed.ac.uk>

Hello, Theodoris. I wish you well in your thesis.
However, it will not be simple in getting appropriate data
and you may well find that the models you mention contain
parameters which are not constant for the whole of France.
There is a major difficulty in validating models for
current weather conditions. You should be able to get
estimates of actual yields by Departement although they
have unspecified and not insignificant error bars
associated with them. Moreover, CERES and AFRC-WHEAT
exclude a number of factors that are important in setting
actual as opposed to water limited potential yield. The
latter would also have to be re-parameterised to take
account of the different cultivars grown. Using averaged
met and soils data can introduce significant errors and I
am sure you are best to take a number of sites (chosen
according to a proper sampling protocol) and look at the
effects in those places.

How much do you know about the work that has been done
already? Do you know about the GCTE workshop at Lunteren;
the work with WOFOST at the Staring centre; the operational
system for prediction of regional yields for current
conditions at the Joint Research Centre at Ispra? We have
a student who is writing up his PhD on the effect of
climate change on Scottish cropping systems (using models
such as the ones you mention) but I don't think it is
submitted yet.
Best wishes,
Graham Russell

Dr G. Russell
University of Edinburgh
Institute of Ecology & Resource Management (Agriculture Building)
West Mains Road
Edinburgh EH9 3JG
SCOTLAND
International phone +44 131 535 4063 Fax +44 131 667 2601
UK phone 031 535 4063 Fax 031 667 2601


From geo293@aberdeen.ac.uk Wed Jun 14 16:01:06 1995
From: geo293@aberdeen.ac.uk
Message-Id: <S9506141401.AA29612@ess.abdn.ac.uk>
Subject: sources of climatic data?
Date: Wed, 14 Jun 1995 15:01:06 +0100 (BST)
In-Reply-To: <6906D2C550E@srv0.bio.ed.ac.uk> from "Graham Russell" at Jun 14, 95 07:31:53 am

Hallo,
and apologies if this is a FAQ. Does anyone know where climatic data at
the european scale (in digital format) can be found? I am interested
in long(ish) time series of temperature precipitations and possibly
soil moisture deficit or/and AE PE.
Thanks a lot

Alessandro Gimona
geo293@abdn.ac.uk



From jp@unlinfo.unl.edu Wed Jun 14 07:29:44 1995
From: jp@unlinfo.unl.edu (jerome pier)
Message-Id: <9506141729.AA29090@unlinfo.unl.edu>
Subject: I'm Leaving! Need a new List Owner...
Date: Wed, 14 Jun 1995 12:29:44 -0500 (CDT)

Dear Agmodels-L Subscribers,

I have accepted a position which will take me away from
my pipeline to the Info Highway. Therefore, I am now looking for
someone who would be interested in being List Owner. It is not
necessary for the Owner to be in physical proximity to Nebraska.
The requirements are basically that the Owner must be an email
junkie who has a large enough quota to handle an increased mail
load (due to routing of mail error messages). The Owner should
also be patient enough to handle problems that arise with
subscribers. Other than that, it is quite simple. The benefits
are name (or at least email address) recognition amongst a global
community of like minded persons.
Please contact me directly at jp@unlinfo.unl.edu if you
are interested.

--
Sincerely,

Jerome Pier
Post-Doctoral Research Assistant
Biological Systems Engineering, Univ. Nebraska - Lincoln
jp@unl.edu



From laowu@mail.ucr.edu Wed Jun 14 06:11:02 1995
Date: Wed, 14 Jun 95 12:11:02 CST
From: "*Wu, Laosheng" <laowu@mail.ucr.edu>
Message-Id: <56596.laowu@mail.ucr.edu>
Subject: Re: I'm Leaving! Need a new List Owner...

Dear Jerome:
Congratulations! I suppose you will come to CA, right? We will have
more chances to see each other now. As a matter of fact, I just came back
from a wetland tour near Fresno yesterdday.
Would you please remove my name (L. Wu, Laosheng Wu etc.) from the
Ag-models list before your leaving. I received three copies of the same
message everyday, and I am moving to a new office. If I were not removed
from the current list, I may receive 4 copies then.
Best wishes to you and your family in CA.

Laosheng



From YPTC@aol.com Wed Jun 14 18:11:17 1995
Date: Wed, 14 Jun 1995 22:11:17 -0400
From: YPTC@aol.com
Message-Id: <950614221115_71024112@aol.com>
Subject: Unsubscribe

Unsubscribe


From GRUSSELL@srv0.bio.ed.ac.uk Thu Jun 15 08:57:31 1995
From: Graham Russell <GRUSSELL@srv0.bio.ed.ac.uk>
Date: Thu, 15 Jun 1995 08:57:31 +0000
Subject: Re: I'm Leaving! Need a new List Owner...
Message-Id: <6A3E10864D9@srv0.bio.ed.ac.uk>

Jerome, thanks for all your work in getting the Agmodels
list going. It is a really useful list now thanks to you.
Good luck with your new job.
Graham

Dr G. Russell
University of Edinburgh
Institute of Ecology & Resource Management (Agriculture Building)
West Mains Road
Edinburgh EH9 3JG
SCOTLAND
International phone +44 131 535 4063 Fax +44 131 667 2601
UK phone 031 535 4063 Fax 031 667 2601


From griggs@brcsun0.tamu.edu Fri Jun 16 05:30:25 1995
From: griggs@brcsun0.tamu.edu
Message-Id: <9506161526.AA15225@brcsun0.tamu.edu>
Date: Fri, 16 Jun 1995 10:30:25 -0500
Subject: Reply: Model Documentation Help

Bill,
I collected info on several different wq models years ago. The info is
available thru ftp.
brcsun0.tamu.edu/pub/preap/modclect then bin, prompt, mget *.*, quit
good luck,
Ray Griggs

>Hi,
>
>My name is Bill Wallace. I work for CIESIN (Consortium for International
>Earth
>Science Information Network at the TERRA (Terrestrial Ecosystems Regioonal
>Research and Analysis ) Laboratory in Fort Collins, CO, USA.
>
>I am working on a project to document information about a wide range of
>models either developed or in use by US Department of Agriculture agencies.
>To
>date 105 models have been documented. Results of the model documentation
>efforts can be seen on the World Wide Web at URL http://forte.poly.edu:3333/.
>
> I need to determine points of contact for the following models in order to
>document information about the model. I would greatly appreciate any help you
>can give me in locating a source of information about the models. Phone
>number and or e-mail would be greatly appreciated, but a name and a lst-know
>location would certainly be of help.
>
>SOIL models:
>
>2DSOIL
>ROOTSIMU
>YASEQL soil equilibrium model
>NUCM (Nutrient Cycling Model)
>
>PEST Models:
>
>Black Cutworm Development Model
>Cornell Pesticide Model (CPM)
>Potato Leafroll Virus (PLRV) Model
>
>CROP Models:
>
>Coton Production Model
>PHYGROW (plant growth model)
>SIMPOTATO
>Winter Wheat Model
>
>HYDROLOGIC MODELS:
>
>CREAMS (Chemical, runoff, and erosion for Agricultural management Systems)
>DRAINMOD
>GWLF
>H20TRANS
>PROSPER
>SWAM (small watershed model)
>SWAT
>SWRRB
>SWRRBWQ
>SPAW (Soil, Plant, Atmosphere, Water)
>
>OTHER:
>
>AGSIM
>NSWERS
>BIOME CLIGEN
>CPS (Conservation Production System)
>ROTO
>SEQDRV
>SIMCYST
>SLAM
>STOCKPOL
>SYRUP
>WIN-HUSTLE
>
>If you look at the World Wide Web page, I would also appreciate any comments
>you have concerning the model information. Thanks for your help!
>
>Bill Wallace



From griggs@brcsun0.tamu.edu Fri Jun 16 05:36:57 1995
From: griggs@brcsun0.tamu.edu
Message-Id: <9506161533.AA15281@brcsun0.tamu.edu>
Date: Fri, 16 Jun 1995 10:36:57 -0500
Subject: Re: CROP DATA REQUSET FOR FRANCE

Theodoros Mavromatis,
Dr. Maurice Cabelguenne with INRA at Toulouse is a very experienced EPIC
developer and user. He can assist you in obtaining or modifying existing
data for EPIC. His address and phone # follow:
National Institute for Ag Research, Agronomy Dept.
Centre de Recherches de Toulouse
Chemin de Borde Rouge
B.P. 27
31326 Castanet-Tolosan DECEX
France
33-61-28-52-80
good luck,
Ray H. Griggs

>Hi all,
>
>I would like to introduce myself as a new subscriber to this list. I am a
>Ph.D student working at the Climatic Research Unit at the University of East
>Anglia with Dr. P.D.Jones. For my thesis I am studying the impacts of climate
>change on wheat through the use of crop climate models. A major part of my
>research would be the application of AFRCWHEAT2, CERES-Wheat and EPIC in
>france.
>I am interested in particular for experimental sites close or in the following
>areas in South Central France
>
>Maine-te-Loire Sarthe
>Indre-et-Loire Loiret
>Cher Yonne
>Vienne
>
>I wasn't able so far to find any crop/management/soil data required by the
>models so any help /information for any possible source of data would be
>greatly appreciated.
>
>
>Theodoros Mavromatis



From jbailey@wolf.ces.ncsu.edu Fri Jun 16 10:53:17 1995
From: Jack E Bailey <jbailey@wolf.ces.ncsu.edu>
Message-Id: <9506161853.AA22888@wolf.ces.ncsu.edu>
Subject: Re: Model Documentation Help
Date: Fri, 16 Jun 1995 14:53:17 -0400 (EDT)
In-Reply-To: <28C7A62035F@terra.colostate.edu> from "Bill Wallace" at Jun 13, 95 04:52:23 pm

JUST FOR THE RECORD, DISEASE FORECAST MODELS HAVE BEEN IN USE FOR QUITE
SOME TIME. IF YOU HAVE INTEREST IN KNOWING MORE GIVE ME A NOTE.

> >Hi,
>
>My name is Bill Wallace. I work for CIESIN (Consortium for International Earth
>Science Information Network at the TERRA (Terrestrial Ecosystems Regioonal
>Research and Analysis ) Laboratory in Fort Collins, CO, USA.
>
>I am working on a project to document information about a wide range of
>models either developed or in use by US Department of Agriculture agencies. To
>date 105 models have been documented. Results of the model documentation
>efforts can be seen on the World Wide Web at URL http://forte.poly.edu:3333/.
>
> I need to determine points of contact for the following models in order to
>document information about the model. I would greatly appreciate any help you
>can give me in locating a source of information about the models. Phone
>number and or e-mail would be greatly appreciated, but a name and a lst-know
>location would certainly be of help.
>
>SOIL models:
>
>2DSOIL
>ROOTSIMU
>YASEQL soil equilibrium model
>NUCM (Nutrient Cycling Model)
>
>PEST Models:
>
>Black Cutworm Development Model
>Cornell Pesticide Model (CPM)
>Potato Leafroll Virus (PLRV) Model
>
>CROP Models:
>
>Coton Production Model
>PHYGROW (plant growth model)
>SIMPOTATO
>Winter Wheat Model
>
>HYDROLOGIC MODELS:
>
>CREAMS (Chemical, runoff, and erosion for Agricultural management Systems)
>DRAINMOD
>GWLF
>H20TRANS
>PROSPER
>SWAM (small watershed model)
>SWAT
>SWRRB
>SWRRBWQ
>SPAW (Soil, Plant, Atmosphere, Water)
>
>OTHER:
>
>AGSIM
>NSWERS
>BIOME CLIGEN
>CPS (Conservation Production System)
>ROTO
>SEQDRV
>SIMCYST
>SLAM
>STOCKPOL
>SYRUP
>WIN-HUSTLE
>
>If you look at the World Wide Web page, I would also appreciate any comments
>you have concerning the model information. Thanks for your help!
>
>Bill Wallace
>

--
Jack E Bailey
E-Mail : jbailey@wolf
Internet: jbailey@wolf.ces.ncsu.edu
Phone : (919) 515-6688


From YPTC@aol.com Sun Jun 18 16:10:26 1995
Date: Sun, 18 Jun 1995 20:10:26 -0400
From: YPTC@aol.com
Message-Id: <950618201025_73420605@aol.com>
Subject: unsubscribe

unsubscribe


From angonin@epoisses.inra.fr Fri Jun 23 10:38:12 1995
Date: Fri, 23 Jun 1995 08:38:12 +0200
From: Catherine Angonin <angonin@epoisses.inra.fr>
Message-Id: <199506230638.IAA22798@epoisses.inra.fr>
Subject: unsubscribe agmodels

unsubscribe agmodels

(e-mail : angonin@epoisses.inra.fr)



From dave@D012S289.mch.sni.de Fri Jun 23 12:38:14 1995
From: Ajay Dave <dave@D012S289.mch.sni.de>
Message-Id: <199506230838.AA15968@D012S289.mch.sni.de>
Subject: Re: unsubscribe agmodels
Date: Fri, 23 Jun 1995 10:38:14 +0200 (MDT)
In-Reply-To: <199506230638.IAA22798@epoisses.inra.fr> from "Catherine Angonin" at Jun 23, 95 02:34:39 am

unsubscribe agmodels


From manternt@squared.com Fri Jun 23 02:38:10 1995
Date: Fri, 23 Jun 1995 07:38:10 -0500
From: manternt@squared.com
Message-Id: <9506231238.AA05908@ws002.squared.com>
Subject: unsubscribe agmodels

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From ROHVM1.RSYJPC@rohmhaas.com Tue Jun 23 08:49:08 1995
Message-Id: <ROHVM1.RSYJPC.3147.1995.0623.0849.0849>
Date: 23 Jun 1995 08:49:08 GMT
From: "John P. Carbone," <ROHVM1.RSYJPC@rohmhaas.com>
Subject: Introduction

Toxicology, Bldg. 9A, Rm 109c
(215)641-7489; FAX (215)619-1621, INTERNET RSYJPC@ROHMHAAS.COM

John P. Carbone
Rohm and Haas Co.
Ecotoxicology and Environmental Risk Assessment
Runoff and groundwater modeling
PRZM2, EXAMS, E-FATE, GENEEC, Jury

Thank you
OPINIONS ARE THOSE OF THE AUTHOR AND NOT THE ROHM & HAAS CO.



From YPTC@aol.com Fri Jun 23 13:28:36 1995
Date: Fri, 23 Jun 1995 17:28:36 -0400
From: YPTC@aol.com
Message-Id: <950623172835_76982982@aol.com>
Subject: Unsubscribe

unsubscribe agmodels


From ricbraga@isa0.isa.utl.pt Tue Jun 27 10:43:00 1995
Date: Tue, 27 Jun 1995 08:43:00 +0200
From: ricbraga@isa0.isa.utl.pt
Message-Id: <009927F2.795AE7E0.28705@isa0.isa.utl.pt>
Subject: Statistics in model validation

Hi!
I'm interested in this:
To do an linear regression between observed and simulated data from
non independent values, i.e., pairs of values from the same experiment/run
of the model, has the problem of violating the assumptions.
What king of methodology have to be used for comparing
values in this condictions?

thanks for any help.\
ricardo braga
Portugal


From lpachepsky@asrr.arsusda.gov Tue Jun 27 01:00:56 1995
Date: Tue, 27 Jun 95 08:00:56 PDT
From: lpachepsky@asrr.arsusda.gov
Subject: RE: Statistics in model validation
Message-Id: <Chameleon.950627082149.luda@william.arsusda.gov>

On Tue, 27 Jun 1995 01:38:50 -0500 ricbraga@isa0.isa.utl.pt wrote:
>Hi!
>I'm interested in this:
>To do an linear regression between observed and simulated data from
>non independent values, i.e., pairs of values from the same experiment/run
>of the model, has the problem of violating the assumptions.
>What king of methodology have to be used for comparing
>values in this condictions?
>
>thanks for any help.\
>ricardo braga
>Portugal
>
In the "Agricultural Systems", Vol 48, 1995, in the issue which is about to
be realeased (perhaps it is released already) there is a series of articles
by L.B.Pachepsky, J.D.Haskett, and B. Acock, An Adequate Model of
Photosynthesis. 1. Parameterization, Validation, and Comparison of Models
and 2.Dependence of Parameters on Environmental Factors. The first article
contains the brief review of model validation with all necessary references.
The methodology of model validation is demonstrated in detail in these
articles with three empirical models of photosynthesis as an example. I
don't have reprints yet, I even did not see these article in the journal
yet, but proofs have been sent to the journal several months ago, so
hopefully it's available already.
In my opinion the best description of the model validation methodology is
given in the book by D.M. Himmelblau, 1968, Process Analysis by Statistical
Methods, John Wiley & Sons, New York. There are many publications about
validation, see also, for example, Caswell, H. 1976. The validation problem
In System Analysis and Simulation in Ecology, ed. B.C. Patten. Academic
Press, New York, 313-325.Jonathan Haskett presented a detailed review of the
methods of validation in his PhD Thesis.
Good luck, Ludmila Pachepsky
-------------------------------------
Name: Ludmila Pachepsky
Systems Research Lab
Bldg 007, Rm 008 BARC-W
10300 Baltimore Ave.
Beltsville, MD 20705
301-504-6042 (voice)
301-504-5823 (fax)
E-mail: lpachepsky@asrr.arsusda.gov
-------------------------------------
06/27/95 08:00:56



From Torsten.Muller@agsci.kvl.dk Tue Jun 27 11:00:01 1995
Message-Id: <sff10ee6.080@kvl.dk>
Date: Tue, 27 Jun 1995 10:00:01 +0100
From: Torsten Muller <Torsten.Muller@agsci.kvl.dk>
Subject: regression

Hi Ricardo!

Can you explain your problem a bit more detailed. Pairs of values from the
same experiment/run of model must not necessarily be dependent and
then violating the assumptions. The problem arises if you measure realy the
same thing (e.g. the high of one single plant) several times. What about
other methods then simple linear regression? Take a look in
- Whitmore a.P. (1991), J. Soil Sc., 42, 289-299
- Loague et al. (1991), J. Contaminant Hydr., 7, 51-73.

Dr. Torsten Mueller
The Royal Veterinary and Agricultural University
Department of Agricultural Sciences
Section of Soil, Water and Plant Nutrition
Thorvaldsensvej 40, DK-1971 Frederiksberg C (Copenhagen), Denmark
Phone: + 45 35283499, Fax: + 45 35283460
e-mail: torsten.muller@agsci.kvl.dk



From montas@ecn.purdue.edu Wed Jun 28 12:56:45 1995
Message-Id: <199506282256.RAA16044@alx8.ecn.purdue.edu>
Date: Wed, 28 Jun 1995 17:56:45 -0500
From: Hubert J Montas <montas@ecn.purdue.edu>
Subject: Preferential Flow Data Needed

Hi to all,

I am looking for data to perform a full validation of a
new deterministic model of preferential transport in
agricultural soils. The following will give you a short
background on the problem, a brief description of the
model, and the kind of data that I am looking for.
I would really appreciate it if you could email me
(if you have data of the type that I currently need) as
it would help me speed up my graduation process.

Sincerely,

Hubert J. Montas
Graduate Research Assistant,
Agricultural and Biological Engineering Department,
Purdue University,
West Lafayette, IN, 47906

BACKGROUND:

I am currently working on a PhD in the Agricultural and
Biological Engineering Department at Purdue University. My
work is concerned with the development, analysis and validation
of a new model of solute transport in agricultural soils with
preferential flow pathways. The model has been presented at
the ASAE International Meeting, in Chicago last week
(ASAE Paper No. 95-2428) and a companion paper described a
Finite Difference approach to the solution of the model
equation (ASAE Paper No. 95-2255).

THE MODEL:

The model is deterministic and applies to steady-state
saturated flow conditions. Model development was limited
to non-sorbing, conservative solutes.

Preferential transport is modeled as a combination of
advection under a unidirectional spatially periodic
velocity profile, and longitudinal and transverse diffusion.

Under the assumptions used during the development of the
model, all parameters have a physical interpretation and
can be obtained independently of miscible displacement
experiments. The model can therefore be used in a purely
predictive mode if all parameters have been measured.
In essence, the velocity profile is obtained from the
unsaturated hydraulic conductivity of the soil, its width
being determined from the size of aggregates present in the
soil. Also, the diffusion coefficient is obtained from
tables, and considerations of counter- and co-diffusion.

Our preliminary tests with data from published experiments
(ASAE Paper No. 95-2428) were very promising, and we are
looking forward to a fuller validation, as well as a
comparison to other models. More specifically, we seek to
compare the predictions of our model to those of a
capillary-bundle model, the one-dimensional CDE, and the
two-region model with first-order interaction.

NEEDED DATA:

The data needed for the validation of our model are of two
types: 1) data to calculate model parameters, 2) data to
validate the model. Both data should come from experiments
performed on cores of undisturbed soil.

To evaluate model parameters, we need the unsaturated hydraulic
conductivity of the soil: K(theta), and some measure of aggregate
sizes.

To validate the model, we seek miscible displacement experiments
performed under steady-state saturated conditions, with tracers.
Ideally, breakthrough curves obtained at a variety of flowrates
would be available. This would allow us to verify whether our
model can represent the behavior of these breakthrough curves,
as well as how different (better/worse) it is from the capillary-
bundle model, the CDE, and the two-region model.

Also, under certain simplifying assumptions, it may be possible
to obtain the model velocity profile from transport experiments
performed in the high flux range. This can diminish, or eliminate
the need for independent measurements of the unsaturated hydraulic
conductivity.

Thanks in advance for all replies,

Hubert J. Montas
Graduate Research Assistant,
Agricultural and Biological Engineering Department,
Purdue University,
West Lafayette, IN, 47906


From SBXBAM@sbn2.phes.nottingham.ac.uk Fri Jun 30 16:54:42 1995
Message-Id: <MAILQUEUE-101.950630165442.384@sbn2.phes.nottingham.ac.uk>
From: MOHAMMAD BANNYAN AVVAL <SBXBAM@sbn2.phes.nottingham.ac.uk>
Date: Fri, 30 Jun 1995 16:54:42 GMT
Subject: A Newcomer

Any body home?
Hi. I am a postgraduste student in Nottingham university, I am
working on wheat crop modelling, beside my model ( which I am going
to develop, as a basic model ) I am going to work with CERES-Wheat,
SUCROS, AFRC, and Sinclair winter wheat models.I would be so
thankfull
if you could share your experience with me, and also if anybody know
something about weather data generator models.
By the way my E-mail code is: sbxbam@sbn2.nott.ac.uk
I hope to start a good subject for modeller chating.
A waiting man
M.Bannayan


From sung@liatris.CNR.ColoState.EDU Fri Jun 30 05:06:48 1995
Date: Fri, 30 Jun 95 11:06:48 MDT
From: sung@liatris.CNR.ColoState.EDU (Sun Guowei)
Message-Id: <9506301706.AA01123@liatris>
Subject: help on sign on and sign off

My email adress has changed. Could you tell me how to sign on and sign off this
mail list. Thanks.

sung@listris.cnr.colostate.edu, or, suguowei@mtu.edu



From KSCHNELLE@dowelanco.com Fri Jun 30 09:42:16 1995
Date: Fri, 30 Jun 1995 14:42:16 -0500 (EST)
From: KSCHNELLE@dowelanco.com
Message-Id: <950630144216.552a@DOWELANCO.COM>
Subject: RE: A Newcomer (weather data generator models)


Here are the weather simulators that I use to
generate daily precipitation, minimum daily
temperature, and max daily temp for multiple years:

WGEN - uses Richardson parameters, WGENPAR generates
parameters for any weather station; USDA 1983, FORTRAN, output formatted
for PRZM pesticide transport model

CLIMATE - updated WGEN with mouse driven interface to
select US weather station to simulate, all parameters are stored in the
system; USDA 1991, BASIC on PC compatibles, output formatted for PRZM but
w/o dates

CLIGEN - very similar to WGEN but parameters are stored in system, over
1000 stations in all 50 states, menu driven; USDA 1989, FORTRAN, output
formatted for GLEAMS pesticide transport model

SIMWTH - based on WGEN, modified for southern hemisphere; CABO,
Wageningen, Netherlands (no longer supported there), FORTRAN

I am sure there are more out there...

Karl Schnelle
kschnelle@dowelanco.com

End of returned message

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