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Apologies for cross-postings.

Regards
Kumar

Check out Caine and Forster 1999, caine et al 1996, smith et al 1990.
Barrier versus conduit determination are dependant on the rock type,
fault orientation, structural regiem, and infilling.

I use FEMWATER to buld gw models with faults having irregular
geometries.  Packer test data from boreholes drilled into faults are
used to bound the fault K values and sens analysis.


--- In gms-users@..., Tim Hazlett <hydromodeler@...>
wrote:
>
> There's a seminal paper on fault flow in the Bighorn Basin (USA) by
Bredehoeft from the 1980's.
>
> He used MODFLOW if I recall.
>
> The real decision you need to make here is whether they are acting as
barriers against or conduits for flow.
>
> I suggest a sensitivity analyses as well.
>
> Regards
> Tim
>

There's a seminal paper on fault flow in the Bighorn Basin (USA) by Bredehoeft
from the 1980's.

He used MODFLOW if I recall.

The real decision you need to make here is whether they are acting as barriers
against or conduits for flow.

I suggest a sensitivity analyses as well.

Regards
Tim

Dear all,

I am modeling a karst area; I have some faults in this area. I have some
monitoring wells around the faults. These monitoring wells supplied us with the
water level changes in the wet season and dry season for two years. Also we
considered it as observation wells in a pump test. I want to take the faults as
the boundary for the study area, so kindly I need answer for the following:

Is it possible to know the hydrologic condition for the fault, and calculate the
flux across it from these monitoring wells?

Can you supply me with names or website for any papers or reports, solving this
problem?

Thanks to all members

I agree with u Vevien, MODFLOW Manual is the most badly written manual where u
should not expect nething except function of each tab...


Vivien Rudorfer <v.rudorfer@...> wrote:

Can anyone advise me on how to do a sensitivity analysis in GMS - I had a go at
it but wasn't sure (1) whether I did it properly, or (2) where to get the
results?

  None of the tutorials I've seen show how to do it and the Help information is
not very helpful either.

  Thanks Vivien

Can anyone advise me on how to do a sensitivity analysis in GMS - I had a go at
it but wasn't sure (1) whether I did it properly, or (2) where to get the
results?

None of the tutorials I've seen show how to do it and the Help information is
not very helpful either.

Thanks Vivien

I think this is the problem that I too had a while back - I think it is because
your layer boundaries are not horizontal (no problem with that) and the river in
some places is in contact with one layer and other places it is in contact with
the next layer.

I think if you double click on the river arc and instead of <use layer range>
choose <auto assign layers using lower cells> this will assign the river arc to
the appropriate cells in the topmost layer that it crosses at all the points
along the arc.

---- Original message ----
>Date: Mon, 07 Apr 2008 15:04:31 -0000
>From: "geo_mithun" <geo_mithun@...>
>Subject: [gms-users] Need help
>To: gms-users@...
>
>   Dear People
>   I'm really confused. I really need your help.
>   Constantly getting this
>   error message when I do the modflow simulation check
>   using GMS 6.0
>   "The Changing Head Boundary Condition is below the
>   bottom elevation of
>   cell"
>
>   Now what I'm trying to do:
>   > build a solid model using lithologs
>   > made a 3D grids and new modflow model
>   > then interpolated the solid solids to modflow
>   model (grid overlay)
>   > specified the head boundary conditions (river) and
>   recharge rates
>   using coverage to modflow comand
>   > interpolate the top surface elevation.
>
>   After that when I check simulation: it gives me
>   above error. not sure
>   what is happening.
>
>   Any help would be appreciated.
>
>   Thanks, Zahid
>
>

Dear People
I'm really confused. I really need your help. Constantly getting this
error message when I do the modflow simulation check using GMS 6.0
"The Changing Head Boundary Condition is below the bottom elevation of
cell"

Now what I'm trying to do:
> build a solid model using lithologs
> made a 3D grids and new modflow model
> then interpolated the solid solids to modflow model (grid overlay)
> specified the head boundary conditions (river) and recharge rates
using coverage to modflow comand
> interpolate the top surface elevation.

After that when I check simulation: it gives me above error. not sure
what is happening.

Any help would be appreciated.

Thanks, Zahid

hello sir,

i am using GMS for my work and my problem is that using MINLP solver
optimization, i want some examples for this solvers here binary varilable uisng
for one of the decision variable, like

yi=sum of (y1*binary variable1+y2*binary variable2+.......

so i need examples for that problem sir,

plse help me out this problem........ for solving my minlp
problem...

                thanking you
                                  your's
                                  vijay

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/
================================================

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

Jordi

This is a simple problem to fix.  I would suggest that you contact
the GMS support staff directly (support@...) and they
will be happy to help you.

Warm regards

Jeff

   _____

From: gms-users@... [mailto:gms-users@...] On
Behalf Of Jordi
Sent: Tuesday, November 20, 2007 1:25 AM
To: gms-users@...
Subject: [gms-users] Problem with Pilot Points

Hi,

I'm working with a one layer local model, converted from a precedent
Regional model. I dispose of a 2D scatter set of 28 measures of logK
from pumping tests, which I toggle on the option of "fixed pilot
point". Next, I generate a new 2D scatter point with about 70 pilot
points. The problem comes when starting to run Modflow, because he
stops at the beginning and says "Error condition prevents continued
MF2PEST execution. Line 4 of file XXX.snn: parameter less than lower
bound".
This comes from the generation of the 2D scatter set of pilot points,
when at the beginning one must to indicate a number in the Default
data set (Scatter point settings). I've tried some different values,
but no way, always the same problem.
Could somebody explain me why it arrives and how should I do to
overcome this step?
Thanks!
Jordi.

Hi,
I'm working with a one layer local model, converted from a precedent
Regional model. I dispose of a 2D scatter set of 28 measures of logK
from pumping tests, which I toggle on the option of "fixed pilot
point". Next, I generate a new 2D scatter point with about 70 pilot
points. The problem comes when starting to run Modflow, because he
stops at the beginning and says "Error condition prevents continued
MF2PEST execution. Line 4 of file XXX.snn: parameter less than lower
bound".
This comes from the generation of the 2D scatter set of pilot points,
when at the beginning one must to indicate a number in the Default
data set (Scatter point settings). I've tried some different values,
but no way, always the same problem.
Could somebody explain me why it arrives and how should I do to
overcome this step?
Thanks!
Jordi.

Hi Bruce ... thanks so much for your response - still no success yet.

You have said to ensure that 'the variables you want to use as pilot points are
set to pilot points and pointed to the observation coverage that you want'.

I have set up 2 HK layers, 2 key values (-30, -60), 2 observation layers with
bore levels (wells), and 2 scatter sets for pilot points.

I have set each HK layer to pilot points (HK_30 and HK_60)and directed them to
the appropriate scatter sets but am not sure how to 'point them to the
observation coverage' - can you advise how to do this??

Thanks for your time Bruce ... Vivien

(Note:
---- Original message ----
>Date: Fri, 9 Nov 2007 06:02:13 -0500
>From: Bruce G Campbell <bcampbel@...>
>Subject: Re: [gms-users] Pilot Points in 2 Layers
>To: gms-users@...
>
>   Hi Vivien -- The short answer is, yes, you'll need
>   separate coverages for
>   each layer for pretty much everything you do with
>   GMS. Make sure your
>   coverages are set for the different layers in the
>   Coverage Setup dialogue
>   like the default layer range and the type of
>   observations. Check these
>   under the MODFLOW -> Observations menu to make sure
>   the observation
>   coverages are active. Check the MODFLOW ->
>   Parameters dialogue that the
>   variables you want to use as pilot points are set to
>   pilot points and
>   pointed to the observation coverage that you want.
>   If you're using the 6.5
>   beta make sure your variable number (-100, for
>   instance) isn't being used
>   anywhere else in the model like a cell bottom
>   altitude. This doesn't
>   matter in the 6.0 version.
>
>   Hope some of this helps. I recently calibrated a 16
>   layer model with pilot
>   points in most of them, so it can be done!
>
>   Good luck. Bruce
>
>   ----------------------------------------------------------
>   Bruce Campbell
>   Hydrologist
>   US Geological Survey
>   720 Gracern Rd, Suite 129
>   Columbia, SC 29210
>   Off: 803-750-6161 Cell: 803-727-9035
>   Email: bcampbel@...
>   ----------------------------------------------------------
>
>   Vivien Rudorfer <v.rudorfer@...>
>   Sent by: gms-users@...
>   11/08/2007 11:57 PM
>   Please respond to
>   gms-users@...
>
>   To
>   gms-users@...
>   cc
>
>   Subject
>   [gms-users] Pilot Points in 2 Layers
>
>   Hi ... I am a student in Australia using GMS and I
>   have a problem that I
>   hope someone can help me with.
>
>   I have a 2-layer model (bottom is confined and top
>   is convertible) that is
>   bounded by a river defined as a specified head drop
>   (as there is no
>   information on the flow rate or conductance etc.) on
>   2 sides and no-flow
>   bedrock boundaries on the other sides. I have
>   created a solid model of the
>   geology and mapped this to a grid and have
>   successfully created a flow
>   model for the site.
>
>   However I am now trying to calibrate the model and
>   determine the HK
>   distribution in each layer but am having no success.
>   I have been using the
>   GMS tutorials as my guide and going to HELP as well.
>   My problem at the
>   moment is related to the fact that I have water
>   levels in both of my
>   layers but I am finding that I can't get the
>   software to recognise that.
>
>   This is what I have done:
>   I have set up a group of 2D scatter points (the
>   pilot points) across the
>   domain as described in the tutorial (which has only
>   1 layer
>   unfortunately). I have a single Observations
>   coverage that includes the
>   water levels in layers 1 and 2 but when I run it all
>   points are being
>   treated as though in layer 2 even though some are
>   defined as being in
>   layer 1. I have also tried using 2 Observations
>   coverages separating the
>   water levels into separate layers but still no
>   success.
>
>   I have been trying different things over the last
>   few days and I think the
>   essence of my problem is simply (and more generally)
>   how to deal with
>   pilot points in 2 layers.
>
>   My only resource is the tutorials and they have only
>   one HK layer, one
>   observation coverage and one set of pilot points.
>
>   Since I have 2 HK layers do I need to create:
>   (a) 2 separate observation coverages that separate
>   the observation bores
>   into layer 1 and layer 2?
>   (b) 2 separate sets of pilot points?
>
>   Thanks ... Vivien
>
>   [Non-text portions of this message have been
>   removed]
>
>

Vivien

Without seeing your files and how you've set up your model, what

you are trying to do can be accomplished by:

-        creating 2 separate pilot point sets

-        make sure that the key values for layer 1 and layer 2 are

different and properly defined in the Parameters dialog.

-        you shouldn't need to have 2 different observation coverages.  You

can but it isn't necessary.

Warm regards

Jeff



   _____

From: gms-users@... [mailto:gms-users@...] On
Behalf Of Vivien Rudorfer
Sent: Thursday, November 08, 2007 9:58 PM
To: gms-users@...
Subject: [gms-users] Pilot Points in 2 Layers



Hi ... I am a student in Australia using GMS and I have a problem that I
hope someone can help me with.

I have a 2-layer model (bottom is confined and top is convertible) that is
bounded by a river defined as a specified head drop (as there is no
information on the flow rate or conductance etc.) on 2 sides and no-flow
bedrock boundaries on the other sides. I have created a solid model of the
geology and mapped this to a grid and have successfully created a flow model
for the site.

However I am now trying to calibrate the model and determine the HK
distribution in each layer but am having no success. I have been using the
GMS tutorials as my guide and going to HELP as well. My problem at the
moment is related to the fact that I have water levels in both of my layers
but I am finding that I can't get the software to recognise that.

This is what I have done:
I have set up a group of 2D scatter points (the pilot points) across the
domain as described in the tutorial (which has only 1 layer unfortunately).
I have a single Observations coverage that includes the water levels in
layers 1 and 2 but when I run it all points are being treated as though in
layer 2 even though some are defined as being in layer 1. I have also tried
using 2 Observations coverages separating the water levels into separate
layers but still no success.

I have been trying different things over the last few days and I think the
essence of my problem is simply (and more generally) how to deal with pilot
points in 2 layers.

My only resource is the tutorials and they have only one HK layer, one
observation coverage and one set of pilot points.

Since I have 2 HK layers do I need to create:
(a) 2 separate observation coverages that separate the observation bores
into layer 1 and layer 2?
(b) 2 separate sets of pilot points?

Thanks ... Vivien

Hello everybody


I am using at the moment modflow with the transport calculator mt3d to
try to simulate the behaviour of a simple injection in a well, on an
area with almost flat water table. I AM GETTING REALLY COMPLICATED to
make a model run have you ever came across such situation,  do you
think would be useful to use other packages more appropriated, or do
you consider that with modflow  it is possible to simulate also the
density dependent flow for that mentioned injection well?

thanks a lot for your reply and help.

sincerely

fredy

Hi Vivien -- The short answer is, yes, you'll need separate coverages for
each layer for pretty much everything you do with GMS. Make sure your
coverages are set for the different layers in the Coverage Setup dialogue
like the default layer range and the type of observations. Check these
under the MODFLOW -> Observations menu to make sure the observation
coverages are active. Check the MODFLOW -> Parameters dialogue that the
variables you want to use as pilot points are set to pilot points and
pointed to the observation coverage that you want. If you're using the 6.5
beta make sure your variable number (-100, for instance) isn't being used
anywhere else in the model like a cell bottom altitude. This doesn't
matter in the 6.0 version.

Hope some of this helps. I recently calibrated a 16 layer model with pilot
points in most of them, so it can be done!

Good luck. Bruce

------------------------------------------------------------
Bruce Campbell
Hydrologist
US Geological Survey
720 Gracern Rd, Suite 129
Columbia, SC 29210
Off: 803-750-6161 Cell: 803-727-9035
Email: bcampbel@...
-------------------------------------------------------------



Vivien Rudorfer <v.rudorfer@...>
Sent by: gms-users@...
11/08/2007 11:57 PM
Please respond to
gms-users@...


To
gms-users@...
cc

Subject
[gms-users] Pilot Points in 2 Layers






Hi ... I am a student in Australia using GMS and I have a problem that I
hope someone can help me with.

I have a 2-layer model (bottom is confined and top is convertible) that is
bounded by a river defined as a specified head drop (as there is no
information on the flow rate or conductance etc.) on 2 sides and no-flow
bedrock boundaries on the other sides. I have created a solid model of the
geology and mapped this to a grid and have successfully created a flow
model for the site.

However I am now trying to calibrate the model and determine the HK
distribution in each layer but am having no success. I have been using the
GMS tutorials as my guide and going to HELP as well. My problem at the
moment is related to the fact that I have water levels in both of my
layers but I am finding that I can't get the software to recognise that.

This is what I have done:
I have set up a group of 2D scatter points (the pilot points) across the
domain as described in the tutorial (which has only 1 layer
unfortunately). I have a single Observations coverage that includes the
water levels in layers 1 and 2 but when I run it all points are being
treated as though in layer 2 even though some are defined as being in
layer 1. I have also tried using 2 Observations coverages separating the
water levels into separate layers but still no success.

I have been trying different things over the last few days and I think the
essence of my problem is simply (and more generally) how to deal with
pilot points in 2 layers.

My only resource is the tutorials and they have only one HK layer, one
observation coverage and one set of pilot points.

Since I have 2 HK layers do I need to create:
(a) 2 separate observation coverages that separate the observation bores
into layer 1 and layer 2?
(b) 2 separate sets of pilot points?

Thanks ... Vivien



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

Hi ... I am a student in Australia using GMS and I have a problem that I hope
someone can help me with.

I have a 2-layer model (bottom is confined and top is convertible) that is
bounded by a river defined as a specified head drop (as there is no information
on the flow rate or conductance etc.) on 2 sides and no-flow bedrock boundaries
on the other sides.  I have created a solid model of the geology and mapped this
to a grid and have successfully created a flow model for the site.

However I am now trying to calibrate the model and determine the HK distribution
in each layer but am having no success.  I have been using the GMS tutorials as
my guide and going to HELP as well. My problem at the moment is related to the
fact that I have water levels in both of my layers but I am finding that I can't
get the software to recognise that.

This is what I have done:
I have set up a group of 2D scatter points (the pilot points) across the domain
as described in the tutorial (which has only 1 layer unfortunately). I have a
single Observations coverage that includes the water levels in layers 1 and 2
but when I run it all points are being treated as though in layer 2 even though
some are defined as being in layer 1.  I have also tried using 2 Observations
coverages separating the water levels into separate layers but still no success.

I have been trying different things over the last few days and I think the
essence of my problem is simply (and more generally) how to deal with pilot
points in 2 layers.

My only resource is the tutorials and they have only one HK layer, one
observation coverage and one set of pilot points.

Since I have 2 HK layers do I need to create:
(a) 2 separate observation coverages that separate the observation bores into
layer 1 and layer 2?
(b) 2 separate sets of pilot points?

Thanks ... Vivien

Dear neeraj

You can find the manual inside the GMS folder in program files, it contain some
documents in doc folder.

    M.Sc. Eng. Rani Fouad Mohamed
                   Phd Student
China University of Geosciences
       Wuhan, Hubei
                        China
           Mobile: 86 27 62626996



----- Original Message ----
From: neeraj dineshchandra sharma <neeraj_me_env@...>
To: gms-users@...
Sent: Thursday, October 18, 2007 1:39:15 AM
Subject: [gms-users] (unknown)

Hello group

presently i have started my Ph.D study in water resources engineering in the
stream of groundwater recharging and its impact on groundwater quality. in that
reference i have been informed to use GMS
so some thing i want to know that how i can get the software not licenced
because i m not in that position to purchase software and second how the manual
to use such software can be obtained.

You are kindly requested to add me a member of such group

yours
Neeraj D. Sharma

Hello group

   presently i have started my Ph.D study in water resources engineering in the
stream of groundwater recharging and its impact on groundwater quality. in that
reference i have been informed to use GMS
so some thing i want to know that how i can get the software not licenced
because i m not in that position to purchase software and second how the manual
to use such software can be obtained.

   You are kindly requested to add me a member of such group

   yours
   Neeraj D. Sharma

Dear member

i use femwater coupled with GMS.

i want to modelize an excavation. i put the head in the bottom of the
excavation as constant head(equal to the elevation) but the level of
aquifer near the excavtion is constant.


do you now how to modelize the excavation with GMS.

Date: Wed, 27 Jun 2007 05:39:49 -0000
From:  "pun_mahesh" <pun_mahesh@...>
To: cpkumar@...
Subject: Exporting Flow files

Namaste Mr. Kumar,

This is Mahesh Pun, a graduate student of Environmental Engineering.
Currently i am using GMS software. Currently i am trying to model a
watershed basin of mid-west america. I am using WASH123D (1D
river/stream, 2D overland, and 3D subsurface flow), modeling of water
flow in an integrated presperctive. Currently it runs on super-
computer, unix environment. I am using (a new user)GMS to generate
geometric and flow files of rivers, overland, and sub-surface. I am
able to create geometric files of these in GMS, extract it from
GMS ,and send it to super-computer and is ready for simulation. But i
can't flow files and extract it from GMS.

Sir if you have any ideas regarding this matter or any advice and
suggestions i could use to solve this problem, please kindly let me
know. I am using all my ideas currently but nothing seems to work.

It was nice to know you through website, an experienced and helpful
person in this field of environment Modeling. I would be waiting for
your reply. Thank you sir.

Sincerely,

Mahesh Pun
M.S. Environmental Engineering
Department of Civil and Environmental Engineering
Department of Biological Systems Engineering
University of Nebraska-Lincoln
pun_mahesh@...

Dear Member,

Based upon the information received, I have initiated preparing the
directory of groundwater hydrologists. You can access the directory at

http://tech.groups.yahoo.com/group/gwmodel/files/

I again request the remaining groundwater hydrologists in this group
to please forward the following details to my e-mail address
cpkumar@... at your earliest convenience.

* Name
* Official Address
* Phone Number
* FAX Number
* E-mail Address
* Website Address
* Area(s) of Specialization

If you press the reply button, then ensure that default group address
is replaced by cpkumar@... in the "To" field, otherwise the
message will go for posting to entire group.

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/
==================================================

Dear Member,

I intend to prepare a directory of groundwater hydrologists. After
compilation, I can upload the directory in the Files section of
gwmodel group (http://tech.groups.yahoo.com/group/gwmodel/files/), so
that anyone can refer to it whenever needed. I therefore request all
the groundwater hydrologists in this group to please forward the
following details to my e-mail address cpkumar@... at your
earliest convenience.

********************************
Name
Official Address

Phone Number
FAX Number
E-mail Address
Website Address

Area(s) of Specialization
********************************

If you press the reply button, then ensure that default group address
is replaced by cpkumar@... in the "To" field, otherwise the
message will go for posting to entire group.

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/
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Hello

   After doing simulation with femwater; I can’t see the surface of the water
table
   And I don’t now if I can cut some cross section

   ghassen
   thank you

Hello! I'm learning GMS and i have some questions.

   1.- How is define the aquifer? I define aquifer like tutorial, but when
convert map --> modflow the simbology of aquifer are the same that wells. Is
ok???

   2.- Then run Modflow, I don't undersand the grahic.

   Is there somewhere explain de results then run Modflow?


   Thanks.

PLEASE SOME COULD HELP HOW TO DEMNSTRATE THE GOVERNING
EQUATION OF TRANSPORT  LINK WITH THIS MESSAGE

  THANK YOU

EXCUSE MY BAD ENGLISH
I SPEAK FRENCH VERY WELL

How to assign layer to solid when we have a complex stratigraphy
in the femwater model, when we want to model a drain - i don't now the step.

Hi there
I am using GMS 4.0 and wondering how to build a 2d and 3d finite
element mesh using imported dxf file or shape file. Any tutoril in
this regard?