FEFLOW errors

Hello everyone,

I want to analyze the errors yield by the choice of grids and time steps.
Well, how to do it? If possible,  could you recommend me some artiles?
Thanks very much.

There are several examples in the documents that come with FEFLOW that show the influence of discretization in both time and space.  See for example the description of Celia et al's problem starting on page 231.  Many text books on modeling cover the subject as well, e.g. Wang and Anderson or Sptiz and Moreno.

An easy way evaluate discretization effects is to iteratively double or halve the number of time steps or elements.