Tuesday, October 28, 2008

Subsidence Targets and Other Stuff

We just added a new target type for land subsidence. This is way down the list of target types. Currently, this new target only works with the older IBS (Interbed Storage) Package but we will also be working on hooking it up to the newer SUB Package. Along with the Subsidence target is the ability to estimate elastic and inelastic specific storage in the IBS Package with Pest. Again, this parameter is way down on the list of Pest parameter types in the parameter definition spreadsheet in Vistas.

You will also see another type called "flow direction". That is not hooked up yet but will be shortly. It will be used to calibrate flow directions as an alternative to the "gradient" target in Vistas. The gradient target is defined from three adjacent head targets using the 3-point problem. The "flow direction" target, on the other hand is simply a point where you define the flow direction (with zero degrees being East, 90 is north, etc.). More to follow in this blog once it is finished.

We also improved the animation export in Vistas. In very large or long model runs, the bitmaps sometimes would quit being updated in later time steps. This works better now but is not fool-proof. If you run into this problem, there is a new option in the animation export to start the animation at the current time step. So find out where your bitmaps quit being updated, import the results for that time step and re-export the animation from there. Note that the file naming and numbering will be consistent with the whole run so that when the animation is finally created, it will be one seamless video.

Also, a few other changes:
- Improved color floods for models with extreme grid spacing changes. In the past you could get a white checker-board effect which is now resolved.
- A few MODFLOW2005 issues were fixed (did not like spaces in the path name, STR Package formatting was incorrect in certain instances, and the highest active layer option in ET was not working correctly)
- Plot/File Operations/Extract was confusing CBB with UCN files
- Stream shapefile import for polylines was not working correctly with tributaries
- Importing an existing SFR input file was not working if some stress periods used the -1 option to use the previous stress period's data
- In dual-domain MODFLOW-SURFACT runs, Vistas was importing the concentrations from the immobile domain instead of the mobile domain


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