Question About Sobol Sensitivity Outputs in SWAT+ Toolbox

[Syahrizal Koem]

Dear Dr. Celray James Chawanda,

I hope you are doing well.

I am currently using the Sobol sensitivity analysis in the SWAT+ Toolbox. I would like to ask whether the Toolbox provides any outputs related to parameter interaction effects, such as:

• Second-order Sobol sensitivity indices (Sij),
• Total-order Sobol sensitivity indices (STi), or
• Any intermediate files that can be used to quantify interactions among parameters.

I noticed files such as par_sample.stb, sample_def.stb, and perf_report.stb in the project directory. Are there any additional output files or options that contain or export parameter interaction information?

Thank you very much for your time and assistance.

Kind regards,

Syahrizal Koem