Calibration of concentration variables (TSS, TN, TP, NO3, NH4, NO2) in SWAT-CUP

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Gebere Egziabher

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Aug 6, 2020, 12:24:55 PM8/6/20
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Dear SWAT/SWATCUP users

I was trying to move from Sediment, NO3, NH4, TN, and TP load to TSS, NO3, NH4, TN, and TP concentrations in my SWAT simulations.  I found that in using the load data, the fit (i.e., model results to observations) provides a bias from a good fit to flow. 

Would you advise how to input concentration (mg/L) of sediment, Total nitrogen, and total phosphorus in SWAT-cup calibration instead of the loads? As you can see in the SWAT-output.rch file, screenshot, SWAT simulates these variables as a load, but I need to calibrate with concentration observed data. How can I force SWAT/SWATCUP to calibrate with concentration data instead of the load? Kindly let me know. Thank you.



Thank you. 

forever seven

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Nov 10, 2021, 1:18:34 PM11/10/21
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Hello,
Did you got the solution to this? 

Thanks.

Dpaceism

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May 14, 2022, 8:03:57 PM5/14/22
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Hello,
You can convert concentration data into loads using LOADEST, see the paper attached

Best,
Dipesh
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