![]() ![]() Experiences with the new HEC-RAS v5 for 2D river f.1D? 2D? or 1D/2D? How Should I Build my Model?.Setting 2D Flow Options for Initial Conditions Time and Ramp up Fraction Is there some simple step I could be missing to pass flows from a 1D to a 2D area? I have tried: When I open the results in RAS Mapper (albeit they are incomplete), it shows the minimum depth of the 2D area as an impossibly high number (103632 with 50 zeros behind it). Flow does not seem to be getting passed to the 2D area properly. My gut says there is an issue with how the 1D and 2D models are coupled together. I feel like I have tried every method I can find for fixing instability issues in unsteady models, but no luck. I am consistently getting the error "Minimum error exceeds allowable tolerance at 18MAY2017 24:00:00", and then it states the cross section where the 1D and 2D are supposed to be coupled. ![]() I am building a dam breach model, with the reservoir modeled as 1D, and the area downstream of the breach modeled as 2D.
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