I am currently having problems with calibrating/finding my RTK parameters and derive a unit hydrograph for my wet period simulations, so any help is more than appreciated!!
I have set up my DWF and flow patterns, and I have calibrated my model using my field flow measurements and the SRTC tool implemented within PCSWMM. I have followed all the steps to derive an RTK unit hydrograph and I have implemented it in my simulations. I have also tried to calibrate the RTK parameters for short, medium and long-term responses. Everything works nicely in my calibration for DWF and all the steps work well for the RTK unit hydrograph creation, however, when I use the SRTC tool I see no response in my hydrographs (comparing my simulated and observed hydrographs), implying that my RTK parameters have no effect on my hydrograph response. How should I understand that my sensibility analysis results in no response from changing my RTK values?
Please note that I am ignoring initial abstractions and that I am using typical values for TK. As for the R values, I can calculate this and are in the order of 1/10 - 3/10 for all the sites I consider.
Any piece of advice or explanation as to why my RTK parameters have no effect on my simulations is more than welcome. Thanks!