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Thanks Peter but sorry ... does equations doesn't speak a lot to me. Maybe should I reformulate my question: in the case of an unconfined aquifer overlaying a confined aquifer, how do you set up storage and drainable porosity ?
Thanks again for your great support.
Cheers!
Didier
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Thanks Peter, can you precise which documents / chapters indicates the formulas I should look at ?
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In the case of the unconfined model, we should specify the fillable porosity however specific storage option is not turned off. Does it mean it is still used by the model, maybe for the "fix" layers rather than the porosity ?
Cheers !
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I used Context, which is faster than a simple notepad. What is the advantage of firstobjectXML ? It doesn't look make for manipulate ascii, isn't it ?
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I had this problem with a quite stable model (unconfined, run in transient ok, more difficulties in SS). With the automatic time step control and the default options the problem occurs. It disappears if I restrict the maximum change ratio. I don't understand this as with or without a constraint, the time step should freeze, isn't it ?
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Effectively I noticed that a pumping was drying easilly. Once this was solved, the time steps curver was more normal.
Thanks Alex !
Cheers
Didier
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use a GIS: export the element from one of the material properties in the .shp format, open it in your favorite GIS and from the table it is very easy to select the appropriate element number. QGis is a free GIS for example.
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You are likely dewatering or flooding with extreme heads your model. If you run it in phreatic mode instead of free&moveable mode (aren't you ?), I bet you will see some crazy values.
Regarding the "start" button being freeze, you usually have to press the stop button before. Was that function frozen as well ?
Good luck !
Didier
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Time to time it happens that during a TS run the time step stays to its initial value (e.g; 0.001 day). A different time integration scheme doesn't solve that. I would be currios to know what is the reason for that behaviour and how to "break" that.
Thanks !
Didier
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What I usually do is using a GIS to estimate the surface, and then I can calculate the appropriate flux (F=Q/S). With budget you can control that you are ending with the correct flow rate. If necessary you can adjust.
I have not seen yet a measurement tool for either area or lenght in V6. That would be very nice to have (at least on 2d views).
Cheers !
Didier