Jump to content
Geochemist's Workbench Support Forum

Estimating uncertainty in reactive transport modelling (X1t, X2t)


Recommended Posts

Hi all,

I use X1t and X2t to predict phosphate concentrations from both dissolution reactors and within groundwaters. These models include lots of parameters, all of which have uncertainty associated with them. However, I am not sure how to estimate the uncertainty on the phosphate concentration that the RTM predicts. I could calculate it by propagating the error through the fundamental equations that the RTM use (SI, advection, dispersion, etc.), but I was wondering if there is a more straight-forward method through?

Thanks for your help,

Sam Bingham 

Link to comment
Share on other sites

  • 4 months later...
  • 2 months later...

From 1 user to another:

GWB does not have the facility to include statistical distribution of parameters. 

Option 1: Manually run various scenarios with consideration of the statistical distribution of the most sensitive parameters. Let say the 50, 66 and 95 percentile of a parameter. 

Option 2: Write a code in Chemplugin that run several models for you with consideration of the statistical distribution of your parameter (which might even be a water balance component). I have not done it myself but think it is a great idea - but one would probably need a lot of time for the development of the code.

If you have several parameters with several different distribution functions, I would say first try to simplify your conceptual model as much as possible...….

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...