visual-modflow : Message: Re: [visual-modflow] impact of a mine on springs

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
river has a river bed conductance so water can seep into the GW or viceversa,
depending on the gradient.

I would start modeling the rivers as rivers (or streams) and check if you can
calibrate the model. If that doean't work use the drains...
I am in the same boat here. let me know what worked for you.

Good luck!
Cristina.

----- Original Message ----
From: Giovanni <g.firmani@...>
To: visual-modflow@...
Sent: Tuesday, June 24, 2008 5:49:44 AM
Subject: Re: [visual-modflow] impact of a mine on springs

springs like drain is better.

On 6/17/08, Jeane Santos <jepenoff@yahoo. com.br> wrote:
> 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 the
rivers and springs like river or like drains?
>
> Thanks
> Jeane

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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

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

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

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

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@...

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

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

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

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

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@...

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

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@...

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

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

Nov 15, 2008
5:32 am

springs like drain is better....

Giovanni
pisolo_quipo

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

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

Jul 1, 2008
4:05 pm

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