TUFLOW 1D Channels and Hydraulic Structures: Difference between revisions

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==How to represent the hydraulic behavior at the outlet of a pipe, including headwalls and transitions to open channels? ==
In general, pipe outlet headwalls affect the exit loss at the pipe outlet, and this can be modeled by changing the 1d_nwk “ExitC_or_WSb” attribute - exit loss coefficient for outlet controlled flow. The default exit loss coefficient is 1.0, assuming there is no headwall, so you can adjust this value accordingly. For more details on these factors, refer to Table 5-3 in the Manual.
More guidance on applying entry/loss and contraction coefficients is available [[TUFLOW_1D_Channels_and_Hydraulic_Structures#What_entry.2Fexit_loss_and_contraction_coefficients_should_I_use_for_1D_culverts.3F | here]].