Our hydrograph data is pretty simple to create. Take a look at the *.hyd file from any example project. You will note some simple things from those.
You get the start time end time
You can build them yourself using any filename and assign them using the in/out condition dialog box.
They are space delimited so take out any tabs that might come from other programs. So if you want to get data from a RAS unsteady hydrograph, you can copy that data from the Data Tables or I think you can save that data to a text file. Just make sure you convert all tabs to spaces.
Or Take a look at any inflow.dat file. You’ll see that they are also super easy to construct using a text editor or copy paste from Excel.
They require a control line with a grid element and the inflow hydrograph in hours. Again, take out any spaces you see.