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Hi I have some detailed HEC RAS models for a series of bridges in a river reach I am investigating. I've run a series of steady state conditions and established the head loss across each for a range of flow conditions. The client has now asked me to investigate the dynamic response of the entire river reach during a flood event. To do this I've setup a TUFLOW FV model of the river channel and floodplain, and setup nodestrings at each bridge location. How can I incorporate the head losses calculated from HEC RAS into my TUFLOW FV model? I'd prefer not to use the culvert + weir approach, which may end up giving me different head losses compared to HEC RAS. Thanks