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Everything posted by forrie

  1. Hi Is it possible to increase the water content in X1t over the model time (node per node)? In the model is an unsaturated zone with an underlying saturated sone and I want to simulate a rising waterlevel. As I understand the "porosity" in "medium properties" needs to increase over time. The unsat zone has an initial water content of 0.1 and this must increase to 0.3 over time. If not in GWB, is it possible to write such a function/script outside GWB? Regards Johan
  2. It would probably work better if I do it in X2t because in X1t flow can only be in one dimension?
  3. Hi Please help - this is urgent How do I force all Cu2++ from kinetic bornite dissolution to form kinetic CuS (covellite - ALTHOUGH IT MAY BE UNDERSATURATED) and Cu+ must go into solution. The covellite must then dissolute kinetically into Cu++ and SO4--. I want Covellite also as kinetic mineral so I dont want to swap Cu++ with covellite in the basis pane. While I am writing here I am thinking prehaps to specify two new (artificial) minerals in the database - one containing the Cu+ part of the bornite and the other one the Cu++ part and then give them seperate kinetic rates. But now I think this will not work because I want to state a kinetic rate for the production of the Cu++ from Bornite dissolution and a separte rate for Cu++ production from the formed covellite. Regards Johan
  4. Hi Brian I have a column test with Cu material (mostly bornite, very little chalcopyrite) I want to model. I have tried the modelling but it still doesnt yield satisfactory results. Usually I have no problem to simulate columns with pyrite but this one is very different and I want to figure out why the SO4 production is so different. There was some lag time (8weeks) before SO4 was suddenly produced (at a significant rate) which I found very suprising. I thought it might have something to do with the mineral kinetics but I am going to send the sample for SEM to see if it could recognise any secondary mineral phases - I think this might help with understanding the results. Has anyone else experience with columns tests on Cu material? Kind Regards Johan
  5. In the end I let bornite dissolution generate the superficial CuS(aq) specie (instead of Cu++) in the database and just let CuS(aq) decompose (using redox kinetic)according to the kinetic rate of covellite. It is a shortcut and I hope it is "legal".
  6. Hi Brian Thanks for the detailed reply! That is why I am using GWB. Anyway, I will try your recommondation and will have a look at the examples. I will let you know whether I came right. Thanks for your help! Regards Johan
  7. My problem is similiar to https://www.rockware.com/forum/index.php?showtopic=1099
  8. Mixing in GSS

    Hi In the patch description the following: "We have released GWB 8.0.7, which addresses the following issues: •In GSS, allow mixing of samples in arbitrary mass ratios." First problem: Ive downloaded the patch but I cant see where to change the mixing ratios in GSS. (One can still mix it yourself in excel but it would be nice if it can be done automatically). Second problem: why dont GSS mix alkalinities? Help will be appreciated Regards J
  9. Mixing in GSS

    Tom, thanks a lot. GSS is really nice to work with your chemical data. Regards Johan
  10. Mixing in GSS

    I have only downloadedinstalled the latest patch 808
  11. hi Tom, Thanks for the upgrade link you sent, however, I still cant plot my scatter data in Gtplot 8.0.2. The data works perfectly in GWB 7. "Time" "SO4--" "Sulfur" "Ca++" 7.00 2791 931.52 435.00 14.00 1827 609.78 377.00 21.00 1285 428.88 308.00 28.00 961.00 320.74 285.00 35.00 860.00 287.03 254.00 42.00 767.00 255.99 242.00 black black black black yield yield yield circle Kind Regards Johan