Assistance Needed on SWAT+ Streamflow Calibration Using SWAT+ Toolbox

[Haris B. Ukat,CE]

Hi everyone,

I am currently working on my dissertation using SWAT+ to assess streamflow of a river.

I would like to seek your guidance on the use of SWAT+ Toolbox, particularly on the model calibration process. I am having difficulty improving the model performance, as my calibration results consistently show negative efficiency values (e.g., NSE < 0) despite several attempts. I would be sincerely grateful for any advice, references, or mentoring that you could share.

Thank you in advance for your help.

[Celray James]

A quick look at this, I think the issue may be more related to input data than calibration. please verify the quality of your input (especially climate) and observation data.

Also, you often do not need more than 40 iterations for DDS