SWAT-CUP, QSWAT calibration of parameters and input data.

[Tony Stark]

Hello guys, please help me correctly calibrate the water flow in the swat-cup. There are no errors, the point is that the water flow does not decrease or is it possible to reduce the output values ​​in QSWAT because I get too large values?

[Yinlong Huang]

Your simulation seems good enough to me. You wouldn't want to overfit the calibration because you are going to increase the uncertainties. However, based on your par_inf.txt file, I noticed that you only have 4 parameters being calibrated. To me that seems to be a relatively low number of parameters. If you have any snow related files, introduce some snow related parameters such as SFTMP, SMTMP, SMFMX, SMFMN, TIMP, TLAPS, PLAPS. You can also consider soil properties such as SOL_AWC, SOL_BD, SOL_K, EPCO, ESCO. Moreover, you can also introduce some channel related parameters such as Manning's N and hydraulic conductivity to adjust the timing for peak flow. 

Tony Stark <zhen...@gmail.com> 于2024年11月11日周一 00:46写道：

Hello guys, please help me correctly calibrate the water flow in the swat-cup. There are no errors, the point is that the water flow does not decrease or is it possible to reduce the output values ​​in QSWAT because I get too large values?

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Yinlong (David) Huang 
B.Sc Engineering(Civil), M.Sc, Ph.D student

Watershed Science and Modelling Laboratory

https://cms.eas.ualberta.ca/faramarzilab/

University of Alberta

Department of Earth and Atmospheric Sciences

Edmonton, AB  T6G 2E3, Canada

1-26 Earth Sciences Building

Tel. 587 987 7860

Email yinl...@ualberta.ca

[dibyaranjan nayak]

Hello mr. Yinlong ji, First of all thank you for accepting my request.
Actually I am running this model for my catchment which is snowed ,I took snow parameters, elevation,sone GW , channel etc, around 23. But the problem I am facing in the parameters range.
If you have some free time please help me.
Thank you

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