Sign In
New User? Register
visual-modflow · Visual MODFLOW Users Group
? Already a member? Sign in to Yahoo!

Yahoo! Groups Tips

Did you know...
You can set the sort order of messages? Just click on the link in the date column. Your preferences will be remembered, so you don't have to do it again when you return.

Messages

  Messages Help
Advanced
impact of a mine on springs   Message List  
Reply | Forward Message #130 of 183 |
Re: [visual-modflow] Problems with the initial condition

Hallo,

1) You consider the computed heads obtained from Calibration Graph( Calculated
vs. observed head) in steady state model.

2) After running the model in steady state, you choose Initial Head selecting
'Previous MODFLOW run' option for transient state run, then it will take initial
head from steady state run and then heads at initial time obtained from
transient run will be same as that of steady state run.

Thank u,

S. Halder


--- On Fri, 4/7/08, Amparo Edwards <aedwards@...> wrote:

From: Amparo Edwards <aedwards@...>
Subject: [visual-modflow] Problems with the initial condition
To: visual-modflow@...
Cc: "Felipe" <forellana@...>
Date: Friday, 4 July, 2008, 7:57 PM

Hi,

I am a civil engineer from Chile, I work in groundwater exploration.

I have two doubts about Visual MODFLOW:

1.- I found a difference between the water level in a cell if I see it from
the cell inspector and from the data exportation (in a steady model). Which
of these is the real water level?

2.- When I run a model in the transient condition the water level in the
initial time at a point is different from the level in the steady condition
(which was used as initial condition). Why?

I hope someone can tell me something about the problems I am facing.

Thanks!

Amparo Edwards S.
Ingeniero Civil Hidráulico U. de Chile




Sat Jul 5, 2008 8:22 am

shalder_2007
Offline Offline
Send Email Send Email

Forward
Message #130 of 183 |
Expand Messages Author Sort by Date

Hello. I'm working in a model to evaluate the impact of a mine in the water supply of springs and rivers around the mine. My question is: what is better - put...
Jeane Santos
jepenoff
Offline Send Email
Jun 18, 2008
3:45 am

Hello Jeane, it depends on the size and flow of the springs and the connectivity with the aquifer. The main difference between river and drain packages is that...
Stela Cota
stelacota
Offline Send Email
Jun 19, 2008
4:11 am

Hallo Jeane, The drain boundary package in MODFLOW is designed to simulate the effects of features e.g. agricultural drain, which remove water from thw aquifer...
subrata halder
shalder_2007
Offline Send Email
Jun 19, 2008
4:14 am

Hallo Jeane, The drain boundary package in MODFLOW is designed to simulate the effects of features e.g. agricultural drain, which remove water from thw aquifer...
subrata halder
shalder_2007
Offline Send Email
Jun 21, 2008
2:49 am

Hi, I am a civil engineer from Chile, I work in groundwater exploration. I have two doubts about Visual MODFLOW: 1.- I found a difference between the water...
Amparo Edwards
aedwards@...
Send Email
Jul 5, 2008
3:37 am

Hallo, 1) You consider the computed heads obtained from Calibration Graph( Calculated vs. observed head) in steady state model. 2) After running the model in...
subrata halder
shalder_2007
Offline Send Email
Jul 5, 2008
11:51 am

Hello, I'm having problems when I try to use initial heads from a previous run. I get a messenge like this "your initial heads are below the bottom of layer 1...
Paulo Leal
pjvleal
Offline Send Email
Jul 27, 2008
1:27 pm

Paulo, I guess this can happen is you have had dry cells in your previous run. Have you checked for this reason? Stela 2008/7/24 Paulo Leal...
Stela Cota
stelacota
Offline Send Email
Aug 4, 2008
12:12 pm

Hi Paulo, During 'creation of a new model' in 'model domain' window, u might put such a value of "Zmax" (i.e bottom) in layer 1, which is above the initial...
subrata halder
shalder_2007
Offline Send Email
Aug 11, 2008
3:41 am

It seems I am lacking some basic understanding of hydraulics: Why does 1 mm/a of recharge to an aquitard result in a water level rise of 1.000 m? Dieter...
Dieter Plass
plass@...
Send Email
Aug 25, 2008
1:44 pm

Because you are probably talking about a steady-state simulation, isn´t it? I had a problem like this too. If the K is too low, the porous material is not...
Stela Cota
stelacota
Offline Send Email
Aug 26, 2008
3:29 am

Yes, it is a steady-state simulation. Am I right in assuming that steady-state simulation means that water levels are calculated for a quasi infinite time...
Dieter Plass
plass@...
Send Email
Aug 26, 2008
9:17 am

Dear Ampro,   I guess the data you have put is been interpolated as you need to convert point data into continuous surface. I have done some work for possible...
Suparn Pathak
s_pathak_y
Offline Send Email
Jul 5, 2008
11:52 am

Hi, 1.- That difference always occurs, but is very little (in my cases is in the second decimal, with head ranging between 0 to 900 m.), so it must be a...
yyukishiro
Offline Send Email
Nov 15, 2008
5:32 am

springs like drain is better....
Giovanni
pisolo_quipo
Online Send Email
Jun 24, 2008
11:46 am

I think the difference between one and the other is that a drain takes the water out of the system and there is no interaction with the groundwater, while a...
Cristina Perez
cris_h2so4
Offline Send Email
Jun 24, 2008
1:26 pm

Cristina, so far I used river, once more people suggested river, and I obtained a good calibration. But we are cheking the fields data and the model is not...
Jeane Santos
jepenoff
Offline Send Email
Jul 1, 2008
4:05 pm
Advanced

Copyright © 2009 Yahoo! Inc. All rights reserved.
Privacy Policy - Terms of Service - Guidelines - Help