![]() ![]() Adjust the starting elevation of the hydraulic curves for cross-sections so that the elevation starts at the cross-section invert.Also make sure that the initial flow matches your minimum flow. Adding an initial flow and keeping it as small as possible may provide the necessary stability. The HEC-RAS model cannot go dry at any time during a simulation.If it crashes during the simulation, check the water surface profiles to pinpoint the location of the problem. If the model crashes at the very beginning of the simulation, check your initial conditions such as flows, storage area elevations and downstream boundary condition.As you approach 1.0 your stability will increase, but if you approach 0.6 your accuracy will rise. ![]()
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