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=Why should I create more Z Shape ridge/max lines with SGS models?=
Without breaklines SGS will be more likely to allow "leaks" through a levee or embankment compared to running the model without SGS. This is because SGS sampling will pick up lower elevations either side of the levee where the 2D cell extends over both sides of the levee, and therefore produce lower flowpaths through the levee or embankment. Therefore, the need to represent all hydraulic controls such as levees (artificial or natural), road/rail embankments, etc is even more important for SGS models (this practice should be carried out for all TUFLOW models, but even more so for SGS models). In summary, add 2d_zsh ridge/max line for every levee, road/rail embankment, etc in SGS models. The breakline feature in <u>[[ASC_to_ASC | asc_to_asc utility]]</u> can be very useful for easily creating breaklines from a DEM.<br>
=If I run one SGS model, double the cell size and run it again, will I get the same results?=
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