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Multiple-Layer Drain Coverages

Rob Virtue

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Is it possible to have separate Drain coverages for different layers, as is possible for Materials and other coverages? This would be particularly useful for underground mine inflow modelling where, in addition to surface water drains, there are subsurface drains and dewatering sumps at different levels.

Currently, if multiple drain coverages are set up, when mapping to MODFLOW, all other drains are overwritten. For example, if I have a Drain coverage for Layer 1 and Layer 2, each of which are set up as only applying to the individual layers, if I map the Layer 1 coverage then the Layer 2 coverage, the Layer 1 drains disappear.

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