PhreeqcUsers Discussion Forum

Processes => Inverse modelling => Topic started by: Grivia1 on April 28, 2018, 06:14:23 AM

Title: Inverse model for conduit flow karst spring with unknown recharge
Post by: Grivia1 on April 28, 2018, 06:14:23 AM
I'm attempting to determine source water of a karst spring that has unique chemistry relative to other springs located less than a mile away. The recharge/source for this spring is unknown. It should be discharging from the same unit as the others, but extensive faulting in the area may be changing its chemistry. I have cation/anion data for this spring, 5 nearby springs, and stream data that the other springs interact with. I'm having trouble with uncertainty errors which may be because I'm approaching the model the wrong way.

Thanks
Title: Re: Inverse model for conduit flow karst spring with unknown recharge
Post by: dlparkhurst on April 28, 2018, 07:57:15 PM
For starters, I would try to make the spring waters from pure water. If you can find plausible reactants that account for the evolution of the waters, then you can consider the differences between the one spring and the others.