High Baseflow and Water Balance Error in SWAT-MODFLOW Simulation

[lynto...@gmail.com]

Hi all,


I am a new user of SWAT-MODFLOW and have been working with QSWATMOD2. Recently, I encountered an issue where the simulated streamflow is substantially higher than the observed flow, particularly for the baseflow component.

I compared the water balance components between the standalone SWAT model and the coupled SWAT-MODFLOW model based on the output.std files. I found that several variables in SWAT-MODFLOW, such as soil water content (SW) and percolation (PERCOLATE), are nearly 10 times higher than those in the original SWAT simulation.

Could you please advise what potential causes might lead to such significant increases in these water balance components? I have attached the relevant model files and output results for your reference.

Thanks！

[lynto...@gmail.com]

Please find attached several relevant files. Water balance error was found in output.std.