Hi Bruce ... thanks so much for your response - still no success yet.

You have said to ensure that 'the variables you want to use as pilot points are
set to pilot points and pointed to the observation coverage that you want'.

I have set up 2 HK layers, 2 key values (-30, -60), 2 observation layers with
bore levels (wells), and 2 scatter sets for pilot points.

I have set each HK layer to pilot points (HK_30 and HK_60)and directed them to
the appropriate scatter sets but am not sure how to 'point them to the
observation coverage' - can you advise how to do this??

Thanks for your time Bruce ... Vivien

(Note:
---- Original message ----
>Date: Fri, 9 Nov 2007 06:02:13 -0500
>From: Bruce G Campbell <bcampbel@...>
>Subject: Re: [gms-users] Pilot Points in 2 Layers
>To: gms-users@...
>
> Hi Vivien -- The short answer is, yes, you'll need
> separate coverages for
> each layer for pretty much everything you do with
> GMS. Make sure your
> coverages are set for the different layers in the
> Coverage Setup dialogue
> like the default layer range and the type of
> observations. Check these
> under the MODFLOW -> Observations menu to make sure
> the observation
> coverages are active. Check the MODFLOW ->
> Parameters dialogue that the
> variables you want to use as pilot points are set to
> pilot points and
> pointed to the observation coverage that you want.
> If you're using the 6.5
> beta make sure your variable number (-100, for
> instance) isn't being used
> anywhere else in the model like a cell bottom
> altitude. This doesn't
> matter in the 6.0 version.
>
> Hope some of this helps. I recently calibrated a 16
> layer model with pilot
> points in most of them, so it can be done!
>
> Good luck. Bruce
>
> ----------------------------------------------------------
> Bruce Campbell
> Hydrologist
> US Geological Survey
> 720 Gracern Rd, Suite 129
> Columbia, SC 29210
> Off: 803-750-6161 Cell: 803-727-9035
> Email: bcampbel@...
> ----------------------------------------------------------
>
> Vivien Rudorfer <v.rudorfer@...>
> Sent by: gms-users@...
> 11/08/2007 11:57 PM
> Please respond to
> gms-users@...
>
> To
> gms-users@...
> cc
>
> Subject
> [gms-users] Pilot Points in 2 Layers
>
> Hi ... I am a student in Australia using GMS and I
> have a problem that I
> hope someone can help me with.
>
> I have a 2-layer model (bottom is confined and top
> is convertible) that is
> bounded by a river defined as a specified head drop
> (as there is no
> information on the flow rate or conductance etc.) on
> 2 sides and no-flow
> bedrock boundaries on the other sides. I have
> created a solid model of the
> geology and mapped this to a grid and have
> successfully created a flow
> model for the site.
>
> However I am now trying to calibrate the model and
> determine the HK
> distribution in each layer but am having no success.
> I have been using the
> GMS tutorials as my guide and going to HELP as well.
> My problem at the
> moment is related to the fact that I have water
> levels in both of my
> layers but I am finding that I can't get the
> software to recognise that.
>
> This is what I have done:
> I have set up a group of 2D scatter points (the
> pilot points) across the
> domain as described in the tutorial (which has only
> 1 layer
> unfortunately). I have a single Observations
> coverage that includes the
> water levels in layers 1 and 2 but when I run it all
> points are being
> treated as though in layer 2 even though some are
> defined as being in
> layer 1. I have also tried using 2 Observations
> coverages separating the
> water levels into separate layers but still no
> success.
>
> I have been trying different things over the last
> few days and I think the
> essence of my problem is simply (and more generally)
> how to deal with
> pilot points in 2 layers.
>
> My only resource is the tutorials and they have only
> one HK layer, one
> observation coverage and one set of pilot points.
>
> Since I have 2 HK layers do I need to create:
> (a) 2 separate observation coverages that separate
> the observation bores
> into layer 1 and layer 2?
> (b) 2 separate sets of pilot points?
>
> Thanks ... Vivien
>
> [Non-text portions of this message have been
> removed]
>
>