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Dry cells


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I have a one grid layer steady state modflow 2005 PCGN model of an esker. The problem is that in the middle of the modeling (esker)area there is a bedrock "outcrop"  that arises above groundwater level (or sometimes even above mineral ground surface).Running modfllow creates dry cells on that area. If I have understood right it is not allowed to "flag" those finite difference grid cells (inside modeling area) as "inactive" (IBOUND) or "isolate" them. I´d would be very pleased to know how to deal with that before mentioned situation, where the esker has accumukated over impermeable crystalline berdrock and the bedrock surface arises locally above adjacent esker´s groundwater level (or even outcrops) in the middle of the esker.( = in the middle/or centre of the modeling area) ? 

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