GWV and ETS package

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José Bustamante

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Apr 21, 2021, 12:10:24 PM4/21/21

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I have a little question about the ETS package in groundwater vistas, and I want to be sure: The PXDP and PETM values in the "ETS Segment Data" table should be written in increasing order for PXDP (PETM decreasing), and not the other way around. right?

Best Regards

JBE

Garth Cooper

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Apr 22, 2021, 1:02:46 AM4/22/21

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Hi,

This is a confusing concept - but yes the depth (PXDP) should increase as the PETM is decreasing. So in Vistas each segment is the inflection point (see picture below).

This package is a bit of a headache but I suggest the following:

1. Look at the example in the ETS documentation (attached)

2. setup a spreadsheet where you can digitise the curve - this will help you with the points. i.e. setup up the PXDP and PETM and graph it

3. Setup a simple model where you increase the fixed heads against time - then you should see the ET rate look like the curve below (Plot hydraulic head against ET rate)