Results between SWAT+ Editor and SWAT+ Toolbox are different

[IAN DAMIAN SIMAMORA]

I'm working on a project that has been calibrated using single-site calibration in SPT, resulting in an NSE of 0.45. I've exported the calibration parameters into the default SQL Database and tried to run it with SPE. The result was a decrease in NSE to 0.326. I have opened the streamflow in the txtinout manually (csv and txt), and the streamflow between SPE and SPT were different. I wanna know what might've caused it, and should I just use the SPT output, or that I need to recalibrate within the SPE?

[Christian]

Hi Ian, it seems this is an error that has occurred before, but at the core it must be due to the type of method used to calculate the metrics in SPT. Regarding your question, so far I haven’t come across any specific article that explains the reason for these variations.

What could help you is to manually calculate the values obtained for your R², NSE, and PBIAS. I’m leaving you a tutorial where they apply it in a simple and very clear way. Best regards 😄!

https://www.youtube.com/watch?v=4Ev2ivU9kno ( "This video is by Professor Adrián López Ballesteros" )