I can think in two options, but you must check the impacts of each one in
the results of your model:

1) Import the terrain topography (1st layer top) and 1st layer bottom
(elevations for both will be the same for the cells where the first layer do
not exist), applying a minimum thickness for the 1st layer. This can be a
good solution or not, depending on your boundary conditions and parameters.

2) Apply inactive cells in the first layer for the cells where sand is not
present. I have never tried this option so I am not able to give you
any clues about the effects of doing this.... only remember that imposing an
inactive cell is equivalent to apply no flow boundary.

Good luck,

Stela Cota
Nuclear Tecnology Development Center - CDTN/CNEN
Belo Horizonte - Brazil
+55-31-3069-4610



2008/5/21 Dieter Plass <plass@...>:

>   Hello,
>
> I have built a 3-layered model: quaternary sands on top of siltstone on
> top of sandstone. Now there are areas where layer1 (sand) does not
> exist. I do not know how to remove layer 1 for single cells in Visual
> Modflow. Please advise.

This can be done by assigning properties to the particular cell (or number of
cells) in first layer (sands) as that of second layer (siltstone).

*************************************************
Dr Vijay Kumar
Scientist 'E1'
Water Resources System Division
National Institute of Hydrology
Roorkee - 247 667, India.
Ph:+91-1332-272906-265
Fax: +91-1332-272123
Alt. email: vk_nih@...
*************************************************


   ----- Original Message -----
   From: Dieter Plass
   To: visual-modflow@...
   Sent: Thursday, May 22, 2008 1:27 AM
   Subject: [visual-modflow] Eliminating layer for single cells

   Hello,

   I have built a 3-layered model: quaternary sands on top of siltstone on
   top of sandstone. Now there are areas where layer1 (sand) does not
   exist. I do not know how to remove layer 1 for single cells in Visual
   Modflow. Please advise.

Hello,

I have built a 3-layered model: quaternary sands on top of siltstone on
top of sandstone. Now there are areas where layer1 (sand) does not
exist. I do not know how to remove layer 1 for single cells in Visual
Modflow. Please advise.

Date: Mon, 19 May 2008 09:41:30 -0000
From: "daniele_baldi" <daniele.baldi@...>
To: visual-modflow-owner@...
Subject: Re: Trouble Running PEST


Hi, I've done a similar problem (hob file was not created)
  and It was
only a directory (software) problem. I mean, I moved all
  the files
from the directory (present on my server) to my computer,
  on the
desktop directory and it's been running well.

Good Luck,

Daniele


--- In visual-modflow@..., "reganw79" <reganw79@...>
wrote:
>
> Hello!  I am trying to calibrate my model with one set of well
> observations and every time I try to run PEST, it says that
the .hob
> file could not be opened.  It appears as though a .hob file is not
> created -- any suggestions?
>
> Thanks!
>

Good Day !!!

You are invited to join "Yahoo! Groups - archydro" (ArcGIS -
Geographical Information System). This group aims to provide a forum
for exchange of ideas and experiences regarding application of GIS in
Hydrology and Water Resources; and use of ArcGIS software (in
general) and Arc Hydro (in particular).

Geographical Information Systems (GIS) are used to display,
manipulate and analyse spatial (map) data. ArcGIS (produced by ESRI)
is an integrated collection of software products for building a
complete geographic information system (GIS). There are three ArcGIS
desktop applications - ArcCatalog, ArcMap, and ArcToolbox. ArcCatalog
is the application for managing your spatial data holdings, for
managing your database designs, and for recording and viewing
metadata. ArcMap is used for all mapping and editing tasks, as well
as for map-based analysis. ArcToolbox is used for data conversion and
geoprocessing. Using these three applications together, you can
perform any GIS task, simple to advanced, including mapping, data
management, geographic analysis, data editing, and geoprocessing.
There are also server-based ArcGIS products, as well as ArcGIS
products for PDAs. Extensions can be purchased separately to increase
the functionality of ArcGIS.

GIS is a powerful tool for developing solutions for water resources
such as assessing water quality and managing water resources on a
local or regional scale. Hydrologists use GIS technology to integrate
various data and applications into one, manageable system. ArcGIS
with Arc Hydro gives you the flexibility to combine watershed
datasets from one map source with stream and river networks. The
suite of tools contained in Arc Hydro facilitate the creation,
manipulation, and display of hydro features and objects within the
ArcGIS environment. Use ArcGIS Spatial Analyst for hydrologic
analysis such as calculating flow across an elevation surface, which
provides the basis for creating stream networks and watersheds;
calculating flow path length; and assigning stream orders.

To subscribe this group, please send a blank email to
archydro-subscribe@yahoogroups.com

Apologies for cross-postings.

Regards
Kumar

Hi: it sounds as if your MODFLOW model is not executing correctly. Check the
folder that you are running the model in for the presence of the .GLO and
.LST files, and check the contents of those files for possible error
messages suggesting that there was a problem with the MODFLOW execution.

Good luck - Matt


On 5/15/08, reganw79 <reganw79@...> wrote:
>
> Hello!  I am trying to calibrate my model with one set of well
> observations and every time I try to run PEST, it says that the .hob
> file could not be opened.  It appears as though a .hob file is not
> created -- any suggestions?
>
> Thanks!

Hello!  I am trying to calibrate my model with one set of well
observations and every time I try to run PEST, it says that the .hob
file could not be opened.  It appears as though a .hob file is not
created -- any suggestions?

Thanks!

Hello everyone.

   I need to modeling a electrokinetic process to removal heavy metals (Co and Cr
VI) in shallow aquifer. But I don't know how to do this with Visual Modflow. 
Can anyone help me with any information?

   Thank you very much.

   Jeane Penoff.

Dear Member,

Can you please refer me to any relevant literature (case
studies/papers/web resources) pertaining to unsaturated and saturated
groundwater flow modelling to study the impact of rainwater
harvesting structures and artificial recharge structures on
groundwater system.

My apologies for cross-postings.

Thanks & Regards
Kumar
================================================
C. P. KUMAR
Scientist 'E1'
National Institute of Hydrology
Jal Vigyan Bhawan
Roorkee - 247667 (Uttarakhand)
INDIA

Web Page : http://www.angelfire.com/nh/cpkumar/
================================================
Unfold the Goddess Within:
http://groups.yahoo.com/group/Shambhavi/
================================================

Steady state model in modflow 4 layers high K, 1 river discharging the main
system
Not been able to calibrate targets successfully.
The model sensitivity does not show any specific parameters sensitive.
Could that be due to a coarse discretization effect?

Thanks in advance

Head boundary conditions in Visual MODFLOW, provided that you are in layer view,
are assigned layer by layer. In the Input menu select the Boundaries menu, and
select either Constant Head or General Head. Go to the layer you whish to assign
the appropriate boundary conditions (either steady state or transient) and
select Assign (Single, Line, Polygon or Window). Draw the boundary (right click
when you finished digitizing the boundary) and a pop up window will show up
where you can define your transient boundary condition by chosing the desired
Start Time and Stop Time. You may define as many intervals as you whish within
your model time frame. If you would like to assign the boundary exactly to the
layer you selected, do not check the Assign to appropriate layer check box.

Please read the online help or get back to me if you have further questions.

Hope this helped.

András

Jakab és Társai Kft.
Ipar u. 17.
H-5100 Jászberény, Hungary
Tel./FAX: +36 (57) 502-640
Tel.: +36 (57) 502-641; +36 (30) 935-9966
E-mail 1: ajakab@...
E-mail 2: jakaband@...
www.jaketa.hu


Akciós ajánlatunk: www.jaketa.hu/Software/arlistak_akc.html
Featured Products: www.jaketa.hu/Software/prlists_spec.html
   ----- Original Message -----
   From: rdhoagland
   To: visual-modflow@...
   Sent: Monday, February 11, 2008 10:33 PM
   Subject: [visual-modflow] Assigning different boundary heads to confined and
uncontined layers


   I need to assign differing transient head boundaries to a confined
   layer than the unconfined layer of my model. How can this be done?

I need to assign differing transient head boundaries to a confined
layer than the unconfined layer of my model. How can this be done?

Hello,

I have a transport model in MT3DMS. From the results, I can plot the
concentration contours. Also, from the mass balance, I can read the
total mass of the contaminant in the aquifer.

Question: is it possible to extract information about the total volume
of contaminated groundwater in Visual Modflow? ((e.g. volume with
concentration > 100 ug/L contaminant)?

Thanks,

Greetz,

Arjen

If I were you firstly I would check the boundry condition and
rectify the boundry condition .There might also exist a wrong  data
in your input file that might have been generated due to simple
mistakes.also check for the units and how u convert units this is
common if thats your firt time modeling groundwater flow.

Regards
Mehran


--- In visual-modflow@..., "brngzz" <mi2992@...> wrote:
>
> Dear gio2anne,
>
> as first attempt you can:
> 1) refine the grid;
> 2) change the solver;
>
> 1) in order to refine the grid, in input menu select grid/edit
grid/
> (edit row) or (edit column) or (edit layer)/ refine by (number).
> 2) in order to change the solver in Vmengine window
> select "modflow2000" (on the left). Then try to select another
solver
> (for example PCG2 or WHS, or, LMG, ecc...) and in top menu bar
> select "run".
> Best regard
>
> G. Bernagozzi

Dear gio2anne,

as first attempt you can:
1) refine the grid;
2) change the solver;

1) in order to refine the grid, in input menu select grid/edit grid/
(edit row) or (edit column) or (edit layer)/ refine by (number).
2) in order to change the solver in Vmengine window
select "modflow2000" (on the left). Then try to select another solver
(for example PCG2 or WHS, or, LMG, ecc...) and in top menu bar
select "run".
Best regard

G. Bernagozzi

it's very easy

For example, your model contains 3 layers, You have to just change the name of
the layer in option goto (input module)

good luck


Uma Mahes <indo_mahes@...> a
écrit :                               Sir, i am happy for join the group

    i am very new to the field

    i know only very small about modflow

    i want to run model in second layer also

    but i know single layer

    pls guide me

    thanks

Sir, i am happy for join the group

   i am very new to the field

   i know only very small about modflow

   i want to run model in second layer also

   but i know single layer

   pls guide me

   thanks

Hi Subrata,

   I didn't take any training for MODFLOW but it took me a considerable time to
strengthen my basics and i learnt MODFLOW while working on it. Mcdonald and
Harbaugh book helped me a lot to get hold on gw modeling basics.

   I am currently posted in guwahati and I am looking for some better options.

   I am sending you the references of my thesis, hope this helps.

   If u find any problem in the working of MODFLOW, then you are always welcome.

   With best wishes
   Vivek


subrata halder <shalder_2007@...> wrote:
           Dear Mr. Gupta
Thanks a lot for your valuable information. Pl. send me the list of review
(1972-2007) from your thesis so that I can go through the literatures which will
be helpful to me for my M.Tech dissertation purpose.Do u get any training for
MODFLOW operation?
Where have u posted now?
Awaiting for your reply soon.
yours faithfully,
Subrata Halder
vivek gupta <jazzvivek_2002@...> wrote:
Hi Subrata,

I have done my M.Tech project in Groundwater flow modeling using Visual MODFLOW
in 2006-07, and i may send u the list of review (1972-2007) which i have made
during my thesis, I believe this should help you.

To tell you the truth Subrata, in india very few studies have been carried out
in the field of groundwater flow modeling.

Sciencedirect.com is the best place for getting any literature from all across
the world. Refine your search by searching into the standard journals such as,
Journ. of Hydrol., Ground Water, Agr. Water Mgmt. etc,.

Hoping to hearing from u soon. All the best in whatever u r doing.

Regards

Vivek Gupta
Design Engineer
Tahal Groups
Mo.: 09954757624

subrata halder <shalder_2007@...> wrote:
Hallo

I want to get a list of few literatures related to past & recent -past works on
'Groundwater flow modelling using MODFLOW' in India.
Pl. help.

Thanks
S.Halder

Dear Mr. Gupta
   Thanks a lot for your valuable information. Pl. send me the list of review
(1972-2007) from your thesis so that I can go through the literatures which will
be helpful to me for my M.Tech dissertation purpose.Do u get any training for
MODFLOW operation?
   Where have u posted now?
   Awaiting for your reply soon.
   yours faithfully,
   Subrata Halder
vivek gupta <jazzvivek_2002@...> wrote:
           Hi Subrata,

I have done my M.Tech project in Groundwater flow modeling using Visual MODFLOW
in 2006-07, and i may send u the list of review (1972-2007) which i have made
during my thesis, I believe this should help you.

To tell you the truth Subrata, in india very few studies have been carried out
in the field of groundwater flow modeling.

Sciencedirect.com is the best place for getting any literature from all across
the world. Refine your search by searching into the standard journals such as,
Journ. of Hydrol., Ground Water, Agr. Water Mgmt. etc,.

Hoping to hearing from u soon. All the best in whatever u r doing.

Regards

Vivek Gupta
Design Engineer
Tahal Groups
Mo.: 09954757624

subrata halder <shalder_2007@...> wrote:
Hallo

I want to get a list of few literatures related to past & recent -past works on
'Groundwater flow modelling using MODFLOW' in India.
Pl. help.

Thanks
S.Halder






---------------------------------
  Forgot the famous last words? Access your message archive online. Click here.

[Non-text portions of this message have been removed]

Hi Subrata,

   I have done my M.Tech project in Groundwater flow modeling using Visual
MODFLOW in 2006-07, and i may send u the list of review (1972-2007) which i have
made during my thesis, I believe this should help you.

   To tell you the truth Subrata, in india very few studies have been carried out
in the field of groundwater flow modeling.

   Sciencedirect.com is the best place for getting any literature from all across
the world. Refine your search by searching into the standard journals such as,
Journ. of Hydrol., Ground Water, Agr. Water Mgmt. etc,.

   Hoping to hearing from u soon. All the best in whatever u r doing.

   Regards

   Vivek Gupta
   Design Engineer
   Tahal Groups
   Mo.: 09954757624

subrata halder <shalder_2007@...> wrote:
           Hallo

I want to get a list of few literatures related to past & recent -past works on
'Groundwater flow modelling using MODFLOW' in India.
Pl. help.

Thanks
S.Halder

Hallo

   I want to get a list of  few literatures related to past & recent -past works
on 'Groundwater flow modelling using MODFLOW'  in India.
   Pl. help.

   Thanks
   S.Halder

There will be a Visual MODFLOW + HydroGeo Analyst course organized in Budapest,
Hungary between 2-5 October. Please visit the following link for course details:

www.jaketa.hu/Software/Hirlevel/GIS_MOD_Bud_en.html

Please contact me directly if you need further information.

Best Regards,
András Jakab

Jakab és Társai Kft.
Ipar u. 17.
H-5100 Jászberény, Hungary
Tel./FAX: +36 (57) 502-640
Tel.: +36 (57) 502-641; +36 (30) 935-9966
E-mail 1: ajakab@...
E-mail 2: jakaband@...
www.jaketa.hu

Akciós ajánlatunk: www.jaketa.hu/Software/arlistak_akc.html
Featured Products: www.jaketa.hu/Software/prlists_spec.html


   ----- Original Message -----
   From: wjt0449
   To: visual-modflow@...
   Sent: Monday, September 17, 2007 8:33 PM
   Subject: [visual-modflow] visual modflow 4.1 training course


   Is there anybody knowing a good modflow training course available soon?
   Onsite or online course is fine.

   Thank you very much for your information.

Please see the following links for the forthcoming training programs.

http://www.flowpath.com/training/training.htm
http://training.bossintl.com/html/groundwater-modeling-engineeri.html

Regards
Kumar
================================================
C. P. KUMAR
Scientist 'E1'
National Institute of Hydrology
Jal Vigyan Bhawan
Roorkee - 247667 (Uttarakhand)
INDIA

Web Page : http://www.angelfire.com/nh/cpkumar/
================================================
Unfold the Goddess Within:
http://groups.yahoo.com/group/Shambhavi/
================================================


--- In visual-modflow@..., "wjt0449" <wjt0449@...>
wrote:
>
> Is there anybody knowing a good modflow training course available
soon?
> Onsite or online course is fine.
>
> Thank you very much for your information.
>

Is there anybody knowing a good modflow training course available soon?
Onsite or online course is fine.

Thank you very much for your information.

Dear Professional,

We would like to inform you about an upcoming 4-day course that will be
organized in Budapest, Hungary with the topic: GIS Analysis and Groundwater
Modeling using HydroGeo Analyst and Visual MODFLOW.

The course is organized by Waterloo Hydrogeologic, Inc. A Schlumberger Company
together with Jakab és Társai Kft.

Course Date:    2007 October 2-5
Course Location:    Geological Institute of Hungary

Please visit our website or contact us for more information about this event, or
Click Here to register.

Upon registering please select the following course topic: Making Sense of
Environmental Data with HydroGeo Analyst (HGA), and select Budapest, Hungary as
the course location.

We hope to see you soon at this unique event.

Sincerely,
András Jakab

Jakab és Társai Kft.
Ipar u. 17.
H-5100 Jászberény, Hungary
Tel./FAX: +36 (57) 502-640
Tel.: +36 (57) 502-641; +36 (30) 935-9966
E-mail: ajakab@...
www.jaketa.hu

Featured products: www.jaketa.hu/Software/arlistak_akc.html

hello i'm morroccan student in hydrogeology and I am a new user of visual
modflow.

I would like to have your opinion concerning how to calculate the quantity of
pollutant in gram in a plume simulated using visual modflow. I imagine that one
will use the option zone budget on  the meshs covered by the pollution which one
will multiply by the concentration calculated on each mesh. Except that the
plume covers only one portion of certain meshs. How approach you one in this
case?

Thank you for your assistance.

I'm trying to import a modflow 2000 dataset in Visual Modflow,
created by the MF96to2k.exe tool. The original model was a modflow96
model created in PM Win. I ran in to the following problem:

The original model (modflow96) works with user defined leakance
(VCONT) and transmissivity. Modflow 2000 of course uses conductance
and thickness.

Kz is calculated by Visual Modflow when a modflow 2000 dataset is
imported, using VCONT and thickness of the layers. The thickness of
the layers is defined by hand (when using the MF96to2k tool), which
is a (arbitrary) constant thickness. The layer thickness, however was
also defined in the original PM Win model, and is not constant at all.

I wish to use a discretization file created by PM win,in stead of the
one created by MF96to2k, so I renamed the discretization file to
match the name in the .nam file.

Visual Modflow however, does not accept my discretization file. An
error occurs.

My question: can Visual Modflow import a modflow 2000 model with a
non-constant thickness, and if so, how can I check what the problem
with the PM Win discretization file is?

Thanks,
Arjen  Oord

Hi Elizabeth is very easy..

Lo primero que puedes hacer es realizar para cada una de las capas es una malla
de superficie en SURFER o en la version que tengas de VISUALMODFLOW...

debes generar para estos 4 superficies que te generan tus 3 Capas dentro de
VISUALMODFLOW, es tos archivos son de extensión "*.grd" una vez tengas estas
superficies las importas desde VISUALMODFLOW...

You need more information, tell me...

________________________________________________________________________________
Ing. John Jairo Márquez Molina
Grupo de Investigación en Ingenieria de los
Recursos Hídricos y Desarrollo de Suelos - IREHISA
Línea de Aguas Subterraneas
Universidad del Valle - Colombia
E-mail: jojamarmol@...
Telf: (057) - 321 21 59 Ext 107



----- Mensaje original ----
De: C. P. Kumar <cpkumar@...>
Para: visual-modflow@...
Enviado: martes, 7 de agosto, 2007 22:40:31
Asunto: [visual-modflow] Layer thickness

Date: Tue, 7 Aug 2007 09:33:41 -0400 (EDT)
From: "elizabeth Philip" <philip_kochumol@ yahoo.ca>
Subject: Layer thickness
To: gwmodel-owner@ yahoogroups. com

Hi, Would you please let me know how to make three layers with 0-40m,
40-130 m and 130-400 m layer thickness in VISUALMODFLOW.

Thanks.
EPhilip

Date: Tue, 7 Aug 2007 09:33:41 -0400 (EDT)
From:  "elizabeth Philip" <philip_kochumol@...>
Subject: Layer thickness
To: gwmodel-owner@yahoogroups.com

Hi, Would you please let me know how to make three layers with 0-40m,
40-130 m and 130-400 m layer thickness in VISUALMODFLOW.

Thanks.
EPhilip

Hi Philip,

   Demo excercise/tutorial of VMOD would be of great help to beginners. I guess
you can download this from WHI website.

   Hash.



philip_kochumol <philip_kochumol@...> wrote:
           Hi, Would you please suggest me any text book with exercises on
VISUALMODFLOW.

EPhilip