Following repeated requests from the Obama Administration to stimulate the
environmental business sector, and demands from the G20 Summit that we save
the world from imminent economic collapse, the PEST Conference organizing
committee (John Doherty, Jim Rumbaugh, and myself) has agreed to extent the
early-bird registration and abstract submittal period through May 1st!
The first-ever PEST Conference will be held in The Stained Glass Hall of the
Bolger Center, Potomac, Maryland ( <http://bolgercenter.dolce.com/>
http://bolgercenter.dolce.com/) November 2nd through 4th, 2009. The goal is
to bring together modelers from a variety of disciplines to discuss inverse
modeling - i.e., parameter estimation and uncertainty analysis - with a
focus on the PEST suite of programs, and seek input from modelers on inverse
modeling needs to guide future code development. The conference will
commence with a message from John Doherty, the developer of PEST, and will
follow with morning and afternoon sessions, each commencing with a key-note
address given by a noted modeler. A poster session will be held one evening.
Oral and poster submissions will be summarized in extended abstracts and/or
full papers, published in electronic proceedings distributed on thumb
drives. The conference will wrap-up with a question-and-answer session
during which attendees will be able to ask questions and provide suggestions
for future development directions. Keynote speakers include John Doherty
(developer of PEST), Ghislain DeMarsily (developer of the Pilot Point
technique), Jim Rumbaugh (ESI, developer of Groundwater Vistas), Jasper
Vrugt (Los Alamos National Laboratory), and Randy Hunt (US Geological
Survey). A one-day "Introductory PEST Course" will be held immediately prior
to the conference, and a two-day "Advanced PEST Course" will be held
immediately following the PEST Conference.
Conference details including information on abstract submissions, early-bird
discounted registration, accommodations, and the pre- and post-conference
courses can be found at:
www.sspa.com/ThePESTConference
Best wishes -
Matt Tonkin, SSP&A
Email: <mailto:pest@...> pest@...
Hello,
I have two problems :
1. Is Modflow solver is only for saturated/parially saturated zones.Means it
will not support simulation if initial head is less than bottom elavation of a
layer.
2. What is the significance of maximum stage in Lake package . My lake stage
during simulation crosses above this maximum stage. Why does it happen???
I am working with MODFLOW using GMS 6.0 interface.
(Apologies for double-postings)
PEST Courses and Conference 2009
Registration is open for the inaugural "DOUBLE-HEADER" SPRING PEST COURSE,
San Francisco, May 2009, comprising a two-day "Introduction to PEST" course
and a subsequent two-day "Advanced Analysis using PEST" course. The
introductory course is suitable to modelers with little to no experience
with inverse methods. This course will comprise about 50:50 lectures and
hands-on-exercises, with the aim of providing theoretical background on
least-squares inverse methods, and practical experience in their
implementation. In the advanced course the emphasis turns to highly
parameterized inversion in calibration of ground and surface water models,
and in exploration of the uncertainty associated with model parameters and
predictions. Topics covered in detail include the use of pilot points as a
parameterization device; advanced regularization techniques; the
"SVD-assist" technique for efficient inversion of highly parameterized
models; linear and nonlinear uncertainty analysis including the highly
expedient Null-Space Monte Carlo method that is unique to PEST. This course
will comprise about 80:20 lectures and hands-on exercises, with ample room
for discussion. Participants at either course will receive a CD containing
12 exercises to take away and study. Attendees can register for the
"Introductory" course, or the "Advanced" course, or both courses with a
discount on the individual course prices. Further information, including a
detailed course outline and registration details, is available at
http://www.sspa.com/Pest/training.shtml
Registration is open for THE INAUGURAL PEST CONFERENCE, to be held in The
Stained Glass Hall of the Bolger Center, Maryland, USA (
http://bolgercenter.dolce.com/ <http://bolgercenter.dolce.com/> ) November
2nd through 4th, 2009. The objective of bringing together modelers from a
variety of disciplines is to exchange ideas, discuss applications of the
PEST suite of programs, share lessons learned, discuss new and planned
developments, and seek input from modelers on inverse modeling needs to
guide future code development with a focus on PEST (www.sspa.com/pest). The
Conference will commence with a message from John Doherty, the developer of
PEST. This will be followed by morning and afternoon sessions, commencing
with a key-note address by a noted modeler, followed by submitted
presentations and a poster session. Submissions will be summarized in
extended abstracts and/or full papers published in electronic proceedings.
The conference will wrap with a question-and-answer session. Keynote
speakers include John Doherty (developer of PEST), Ghislain DeMarsily
(developer of the Pilot Point technique), Jim Rumbaugh (ESI, developer of
Groundwater Vistas), Jasper Vrugt (Los Alamos National Laboratory) and Randy
Hunt (US Geological Survey). A one-day "Introductory PEST Course" will be
held immediately prior to the conference, and a two-day "Advanced PEST
Course" will be held immediately following the PEST Conference, with
instruction from John Doherty, Jim Rumbaugh, and Matt Tonkin. Details
including information on abstract submissions, early-bird discounted
registration, accommodations, and the pre- and post-conference courses can
be found at www.sspa.com/ThePESTConference.
Regards, Matt Tonkin
S.S. Papadopulos & Assoc., Inc.
email: <blocked::mailto:matt@...> matt@...
Nhan
If you visit the GMS Wiki you will find dozens of tutorials, most of which
include the conceptual modeling tools. Here is a link to get started:
http://www.xmswiki.com/wiki/GMS:Tutorials
From this link you can download not only the tutorial documents but also
the data files.
Contact the folks at aquaveo.com if you more questions.
Warm regards
Jeff
From: gms-users@... [mailto:gms-users@...] On
Behalf Of nvo_seadot@...
Sent: Tuesday, February 03, 2009 7:37 PM
To: gms-users@...
Subject: [gms-users] new to the community
Hi all,
I have been trying find a software to model groundwater with 3d
visuals. I'm trying out GMS and would like to know of a good tutorial
to get started.
My purpose is to do a conceptual model for a site for now. If anyone
has any ideas about a good GMS tutorial source or even any other
softwares to accomplish the task please let me know. Thank you very much.
-nhan
Hi all,
I have been trying find a software to model groundwater with 3d
visuals. I'm trying out GMS and would like to know of a good tutorial
to get started.
My purpose is to do a conceptual model for a site for now. If anyone
has any ideas about a good GMS tutorial source or even any other
softwares to accomplish the task please let me know. Thank you very much.
-nhan
On behalf of John Doherty, Jim Rumbaugh, and myself, please consider joining
us at the first-ever PEST conference! This will be held in The Stained Glass
Hall of the Bolger Center, Potomac, Maryland (
<http://bolgercenter.dolce.com/> http://bolgercenter.dolce.com/) November
2nd through 4th, 2009. The goal is to bring together modelers from a variety
of disciplines to discuss the use of inverse modeling techniques - i.e.,
parameter estimation and uncertainty analysis - with a focus on the PEST
suite of programs, and seek input from modelers on inverse modeling needs to
guide future code development. The conference will commence with a message
from John Doherty, the developer of PEST, and will follow with morning and
afternoon sessions, each commencing with a key-note address given by a noted
environmental modeler. A poster session will be held one evening. Oral and
poster submissions will be summarized in extended abstracts and/or full
papers, published in electronic proceedings distributed on thumb drives. The
conference will wrap-up with a question-and-answer session during which
attendees will be able to ask questions and provide suggestions for future
development directions. Keynote speakers include John Doherty (developer of
PEST), Ghislain DeMarsily (developer of the Pilot Point technique), Jim
Rumbaugh (ESI, developer of Groundwater Vistas), Jasper Vrugt (Los Alamos
National Laboratory), and Randy Hunt (US Geological Survey). A one-day
"Introductory PEST Course" will be held immediately prior to the conference,
and a two-day "Advanced PEST Course" will be held immediately following the
PEST Conference.
Conference details including information on abstract submissions, early-bird
discounted registration, accommodations, and the pre- and post-conference
courses can be found at:
www.sspa.com/ThePESTConference
Best wishes -
Matt Tonkin, SSP&A
Email: <mailto:pest@...> pest@...
just came across GMS Femwater lately.I like it very much. Found it
hard to setup a hypothetical saltwater intrusion into a single pumping
well. The tutorials dont clearly illustrate an example for it.Could I
get some specialists hand on this. I need it to demonstrate
capabilities of the software. So, it might be useful if help could
include the visualization of the results.
I would appreciate any help on this. Thanks and More Power to the group.
Roma
We would like to make you aware of session H75 "Decision-Appropriate
Modeling throughout the Lifecycle of Restoration, and other, Environmental
Projects" at this years AGU Meeting in San Francisco, December 15-19
(http://www.agu.org/meetings/fm08/index.php/Main/HomePage). The goal of this
session is not to discuss the mathematical details of model applications and
uncertainty analysis: rather, the goal is to discuss examples where models
have been both successfully and unsuccessfully applied in support of
environmental decision making, and attempt to elucidate the apparent reasons
for their success or failure. The conveners consider the following as
potential topics for discussion:
* Simplistic versus complex models - Do the benefits of complex
models justify their use?
* Deterministic or stochastic modeling? - Their pro's and con's for
decision making and for expert testimony.
* Dealing with uncertainty - Rigorous evaluation vs. communication?
* How can you tell a good model from a bad? - Is there no hope for
the decision maker to tell the difference?
* Modeling objectives - Who sets them, are they realistic, and who
evaluates the results?
* Collaboration with stakeholders - Best practices, new paradigms,
and future directions.
Abstracts for this session are due no later than September 10th, 2008:
please review the instructions on the following page
(http://submissions3.agu.org/submission/subm-ins.htm) regarding submittals.
We hope that you will be able to join us for some lively debate in December
Regards,
Matt Tonkin, S.S. Papadopulos & Assoc., Inc.
<blocked::mailto:matt@...> matt@...
Dave Miller, Fluor Hanford, Richland, WA
David_S_Miller@...
Alex Spiliotopoulos, S.S. Papadopulos & Assoc, Inc.
alexs@...
SSP&A is excited to be able to host the following course in Bethesda,
Maryland (USA) this September, 2008:
"Building and Applying Analytical Element Models with Examples and Exercises
using Python"
Analytic element models are often refreshingly easy to understand, and
insightful. The best approach to learn the analytic element method is to
implement it in a simple computer program. This sounds daunting, but using
the Python language, it is possible for any hydrogeologist with a basic
understanding of the building blocks of a computer program. In this new
course, you will build your own analytic element model, and have a great
time doing it.
The course is taught by Dr. Mark Bakker. Mark has taught for 10 years at
American universities and now teaches at the Delft University of Technology
in The Netherlands. In addition, Mark is a consultant for Kiwa WR in Holland
and for WHPA in Bloomington, IN. Mark received his Ph.D. at the University
of Minnesota under the guidance of Prof. Otto Strack, the originator of the
analytic element method. Mark has written a number of analytic element
programs, of which TimML, the free, open-source analytic element model for
steady multi-aquifer flow is the most extensive. Mark has taught workshops
in Python for Hydrologists and used Python in his Computational Methods
class at the University of Georgia, where students were programming in
Python after a basic 2 hour lecture.
For further information on the course, please visit the following web page,
or write to matt@... :
<http://www.sspa.com/Software/analytic.shtml>
http://www.sspa.com/Software/analytic.shtml
Registration will be limited to 12 attendees. A block of rooms has been
arranged at a nearby hotel for course participants - details are provided on
the web page.
Best wishes -
Matt Tonkin
S.S. Papadopulos & Assoc., Inc.
Tel: 301 718 8900 x258
email: matt@...
SSP&A is very excited to be able to host the following course in Bethesda,
Maryland (USA) this September, 2008:
"Building and Applying Analytical Element Models with Examples and Exercises
using Python"
Analytic element models are often refreshingly easy to understand and very
insightful. The best approach to learn the analytic element method is to
implement it in a simple computer program. This sounds daunting, but using
the Python language, it is possible for any hydrogeologist with a basic
understanding of the building blocks of a computer program. In this new
course, you will build your own analytic element model, and have a great
time doing it!
The course is taught by Dr. Mark Bakker. Mark has taught for 10 years at
American universities and now teaches at the Delft University of Technology
in The Netherlands. In addition, Mark is a consultant for Kiwa WR in Holland
and for WHPA in Bloomington, IN. Mark received his Ph.D. at the University
of Minnesota under the guidance of Prof. Otto Strack, the originator of the
analytic element method. Mark has written a number of analytic element
programs, of which TimML, the free, open-source analytic element model for
steady multi-aquifer flow is the most extensive. Mark has taught workshops
in Python for Hydrologists and used Python in his Computational Methods
class at the University of Georgia, where students were programming in
Python after a basic 2 hour lecture.
For further information on the course, please visit the following web page,
or write to matt@... :
<http://www.sspa.com/Software/analytic.shtml>
http://www.sspa.com/Software/analytic.shtml
Registration will be limited to 12 attendees. A block of rooms has been
arranged at a nearby hotel for course participants - details will be
provided on the web page soon.
Best wishes -
Matt Tonkin
S.S. Papadopulos & Assoc., Inc.
Tel: 301 718 8900 x258
email: matt@...
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
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/
================================================
Company: Ardaman & Associates, Inc. (a subsidiary of Tetra Tech)
Job Title: HYDROGEOLOGIST
Description: Career opportunity for entry level and experienced (1-5
years) hydrogeologists and engineers in the water resources field.
Candidates should possess a very strong foundation in groundwater
hydrology (with surface water skills a plus), hydraulics and finite
difference and finite element techniques. GIS and water quality
experience (and/or course work) would also be desirable. Other
important factors include communication and report writing skills, as
well as use of word processing, spreadsheet and database software.
Respondents must be technically superior and have at least a
bachelor's degree in hydrogeology, civil or environmental engineering.
Successful respondents will work in Orlando, performing data
development, analysis, computer modeling of groundwater and surface
water systems and other related studies in the water resources field.
Send a confidential resume to Dr. Tim Hazlett, at Ardaman & Associates
Inc., 8008 South Orange Avenue, Orlando, FL, 32809, or e-mail to
thazlett@....
A 3 day PEST course will be held in Bethesda, Maryland, USA, the week of
April 7th, 2008. Recent PEST development has focused on stabilizing the
inverse problem for highly-parameterized models and evaluating model
predictive error. In doing so, the methods embodied in PEST take into
account the null space contribution to potential predictive error. All
course participants will receive a CD with a seven comprehensive PEST
workshops. Participants will also receive the latest version of PEST and all
of its support utilities. The workshops show how to use these utilities. For
more information on the course, including registration, please visit the
following web page.
http://www.sspa.com/pest/training.html
Current course registration fees reflect a 10% "early-bird" registration
discount available through January 31st, 2008. Fees will rise to the full
rate February 1st, 2008. Please write to pest@... with any questions
about the course.
Best wishes ---
Matt Tonkin, SSP&A
Moderator, pest@...
[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
Send Email
Offline 
Online 