System runoff output for different rainfall resolution
I have rainfall resolution of hourly and corresponding 10 min values as an input to the model. Looking at the system runoff of the specified resolution for comparative evaluation, there was an exponential increase in system runoff for 10 min resolution, approximately 10 times which is impossible, having a reporting step of 10 min for the high quality output. On changing the reporting step to hour, the system runoff changes, also gap between the runoff measured for hourly and 10 min reduces, which is realistic. So i am confused to which System runoff should be considered. i also checked the volume of rainfall for both the cases in status report which is same. So can anyone explain why there is huge difference in hourly and 10 min resolution system runoff when the reporting step is kept 10 min?