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Topic: Inverse Modeling (Read 1649 times)
rajeshrajenthran
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Posts: 1
Inverse Modeling
«
on:
November 19, 2014, 07:33:48 AM »
I am using two groundwater samples along the flow path
Initial solution
pH Na Ca Mg K Cl- SO42- HCO3 Si Al
7.76 58.40 128.79 50.61 8.60 181.82 284.92 434 9.72 0.07
Final Solution
7.31 9007.27 427.29 1018.68 303.50 17898.17 35.55 1781.20 6.47 0.22
but i am getting this kind of errors
Using Cl1 standard precision optimization routine.
WARNING: Mg is included in solution 1, but is not included as a mass-balance constraint.
WARNING: Mg is included in solution 2, but is not included as a mass-balance constraint.
ERROR: Not possible to balance solution 1 with input uncertainties.
ERROR: Not possible to balance solution 2 with input uncertainties.
ERROR: Calculations terminating.
Stopping.
Please give me solution
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ztwatson
Top Contributor
Posts: 27
Re: Inverse Modeling
«
Reply #1 on:
November 25, 2014, 04:23:55 PM »
I am not sure if you have your input set up correctly. You should provide your entire input for verification to see what is wrong. You may need to include minerals for dissolution or precipitation. Also make sure your balances and/or uncertainties are in the input.
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dlparkhurst
Top Contributor
Posts: 1171
Re: Inverse Modeling
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Reply #2 on:
November 27, 2014, 04:32:27 AM »
You need to include all major elements of solution as mole-balance equations in the inverse modeling setup. You may use -balance; Mg; to include the equation, or probably better is to provide a mineral/exchange source/sink in -phases.
By not including Mg it is ignored in the solution resulting in a charge imbalance in the inverse calculations.
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