I have develop a event based model to analyze the sensitivity of the channel parameters (Bed and Bank Roughness coefficient, Bed width, Maximum Depth) and the sensitivity of the intermittent storage areas. According to the results, sensitivity values are lesser than 10%. I mean when I change the channel parameters one at a time, plus 50% or minus 50%, model outflow hydrograph peak and the hydrograph shape variation is less than 10%. I used daily resolution rainfall data series. I want to know why there is no significant change when I change those parameters.
I have attached the model files here.