Surface Flow Overestimation with CN vs. Low Precipitation with Green–Ampt in SWAT

[Saba Shaghaghi]

Hello,

When I use the CN method, I get an overestimation of surface flow. However, when I switch to the Green–Ampt method, the precipitation shown in the SWAT “Hydrology” section appears to be too low, which causes the surface flow to be nearly zero.

For the Green–Ampt method, I converted my weather data to hourly format, but after running the model, I still notice that the precipitation is reported as very low. Additionally, in my textinout folder there is no output.sub file, and the pcp.cli file only lists station names without including the subbasins. 

Thanks for your assistance,

Best regards,

Saba