CROP YIELD CALIBRATION

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Benjamin Donkor

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Apr 15, 2026, 1:45:16 PM (yesterday) Apr 15

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Hello Swat-user,

I am working on calibrating corn and soybean yields for my watershed, but I seem to be running into some challenges, particularly with soybeans. The calibration results are unsatisfactory, and in some subbasins the model produces no soybean yields, even though observed (area-weighted, county-to-subbasin) data indicate otherwise.

For context, I developed a management operation schedule for a single HRU of corn and applied it across all HRUs with corn, as my watershed has more than 800 HUC8 subbasins, and calibrating each individually would be impractical. I followed the same approach for soybeans; however, the results have been inconsistent, with some subbasins showing no simulated yields.

I would appreciate any guidance or assistance on this.

Thanks,

Benjamin

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