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This is especially relevant for MF6 models, since there are strict input checks.
Possible logic would be:
Assign to top active layer (for DRN and GHB for example)
Assign to one layer based on bottom- or stage level
Assign to all layers where stage or bottom > cell-bottom. Conductance should be distributed based on:
a. Intersection length
b. Transmissivity contributions
C. ...
Requirements:
Create some place to store settings for each package.
The user should be able to alter these settings, provide custom settings
Create functions to find layer based on provided z value (could be bed level, could be elevation), option 2, and and a function which returns all active cells above a provided z value, option 3.
For option 1, we can use the methods already added to imod.prepare.layer
See this report from Sweco describing different methods to allocate cells with depth and distribute conductances over depth in iMOD5. Nice summary of requirements for this story!
I translated the list of settings in iMOD5.6 briefly below. We could create a set of utility functions to support this, so that users can mix and match what they'd like.
Allocation RIV cells with depth:
Laying inbetween river stage and bottom elevation (IDEFFLAYER=0)
First active cell to bottom elevation (IDEFFLAYER=-1)
First active cell to bottom elevation, cells above river stage can only drain (IDEFFLAYER=1)
In cells where bottom elevation is located (IDEFFLAYER=2)
In GitLab by @HendrikKok on Nov 7, 2023, 10:41
This is especially relevant for MF6 models, since there are strict input checks.
Possible logic would be:
Assign to top active layer (for DRN and GHB for example)
Assign to one layer based on bottom- or stage level
Assign to all layers where stage or bottom > cell-bottom. Conductance should be distributed based on:
Requirements:
Tasks
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