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If non-linear options are selected, then the Only Reset SUB/SVB Flags When Needed checkbox is available. By default, the SUB/SVB flags are reset to open/wet every iteration. The CALPUV/CONGRAD process then iterates to find the dry cells and turns off those cells. This checkbox option allows speeding up wetting and drying iterations but will cause a slight difference in results. This option to only reset cells that require resetting is available for 2TL only.
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Figure 1. Hydrodynamic Options: Wetting and Drying.
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