I am a new user of Hec-Ras softwar and i want modelize a river with threshold. I created all the the cross sections except that I have a problem when I want to enter the characteristics of the threshold. I have not found the option that allows me to integrate the threshold into the model.
I am doing the same thing and I simulate my river thresholds by manually editing the level of the crossection where the threshold is placed. I also place "normal" crossections very close to the threshold to make the crossection as "thin" as wanted.
Remember that a threshold also increases the mannings n at the specific point so that has to be taken in account to.