• Re: LTE Lifetime-expectancy vs. Backward-Streamline-Isochrone markers

    Thanks a lot!
    Good to know about this effect.
    I think it is not so unusual to have a thin (quarternary) aquifer with a relatively large extent.

    Best regards
    Stefan
  • Re: Hydraulic head - potential-difference - two aquiferes

    Hi Peter,

    Thanks for your help!

    Nr. 2) That's fine! "quick & simple"
    Nr. 1) It doesn't work....When I copy head from one slice to a nodal distribution, add this to view components, then add the current head to view components and move to another slice then the nodal distribution always shows "no data range". What am I doing wrong?

    Cheers
    Stefan
  • Hydraulic head - potential-difference - two aquiferes

    Hi,

    1.) I would like to see in 2D-view simultaneousely the isolines of hydraulic head of two aquifers (different potenzials).
    Is this possible?
    2.) I would like to see the head-difference between theese two aquifers using the user Data/nodal expression. Is it possible to make an expression like "head(slice_y) - head(slice_x)"?

    Thank you for helping me!

    Best regards

    Stefan
  • Re: LTE Lifetime-expectancy vs. Backward-Streamline-Isochrone markers

    Hi Peter,

    thank you for this quick reply!

    …but still another question:
    I built up a simple confined 3D-model (1000 m x 1000 m x 5 m; 5 Layers).
    When I set the dispersivity in the field-line-computation-settings for the random-walk tracks as fixed homogeneous value = 0 m, the isochrones-result for the standard streamlines, the random walk tracks AND the LTE are the same.
    That is, what I expect for the standard streamlines and RWT.
    But: The LTE-isolines don’t change, when I change the dispersivity (material properties/mass transport-lte) within realistic values (< 100m/10m). The LTE-isolines only begin to move if I set the dispersivity > 500m/50m!!
    To get nearly the same result with the RWT and LTE I have to set the dispersivity for the RWT (in the field-line-computation-settings) 0,5m/0,05m while the dispersivity for the LTE (in the material properties/mass transport-lte) is set 500m/50m.

    So, I'm not sure which method I should choose  to define e.g. a '3-years-travel-time distance' to a well.

    Thanks for your help!

    Best regards
    Stefan
  • LTE Lifetime-expectancy vs. Backward-Streamline-Isochrone markers

    Hi,
    I have a fully confined 3D-model.
    When I start backward-streamlines from a 3D-polyline along the outflow-border with isochrone-markers (e.g. 10a distance) the result is completely different to the isolines of the LTE (same distance 10a). Why?
    The isolines of the LTE are nearly the same in each layer, no matter what conductivity is set.
    The isochronemarkers of the streamlines depend on the conductivity (that is what I expect).

    Thanks a lot for any help!

    best regards
    Stefan