How to transfer calibrated parameters from SWAT-CUP to another TxtInOut directory?

[Hydro Water]

Hello all,

I have my calibrated model (using SWAT-CUP) and multiple TxtInOut directories, which has my landuse and climate change scenarios. Couple of questions

1. How do i transfer my most optimal parameter ranges from calibrated model to other TxtInOut directories that has my scenarios files?
2. Do i need to use the pcp, tmp data of the calibrated model appended to future data (making the model condition same as the calibrated model before running the model to predict future changes)?

Any thoughts are highly appreciated

Ameer

[José Monteiro]

Dear Ameer,

If you simply want your SWAT-CUP project to have txt files with parameter values of the best simulation, you can simply run the post bat for the best simulation, only. If you want parameters to be substituted in the dat base of your SWAT model, and if you can work well with R, maybe this helps:

https://www.researchgate.net/publication/318110074_Overcoming_challenges_of_large-scale_SWAT_applications_with_R_Modelling_of_the_Amazon_basin

Good luck,
José

[Hydro Water]

Hello Jose,

Many thanks for the link. my problem is slightly different, i dont want to go back to ArcSWAT that would require updating data base being populated with the so called best parameter set. Suppose i have two ArcSWAT project with same enforcing except one with a different land use. Let i use the TxtInOut of one ArcSWAT project and did the calibration using SWAT CUP. Now i would like to use the calibrated parameters for my second project that has everything same except different land use.  The confusion is whether simply copying the par_inf.txt file into the TxtInOut directory of the new project (using SWAT-CUP) is the right way?

Would appreciate any insight.

Ameer

[Karim Abbaspour]

yes, the parameter ranges in par_inf are your calibrated parameters. Just copy them and propagate the uncertainty in them (by running an iteration), and extract the variables you want, run post processing, etc. to see the results.

Karim

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[Hydro Water]

Many thanks Dr. Karim,

If i am not intrested in uncertainty but rather the deterministic output. I would then need to copy the par_inf.txt as well as par_val.txt, i guess. Here are the steps that i believe should be followed with regards to climate change. please correct me if something is wrong

• I will re-run ArcSWAT with updated future weather files, skip the first 30 years (making model condition same as that of the baseline model)
• Copy the Calibrated parameter ranges but edit SwEdit to reflect best simulation number (start and end simulation number should be set to best simulation number)
•  Edit extrat_rch_no_obs.def as per the future data set
•  Edit 95ppu_no_obs.def as per future data set
• In the SUFI2_Extract.bat uncheck the observed extract files and check the no_observed one
• In SUFI2_post.bat uncheck all observation (put REM in front of the first 4 files) except 95ppu_No_Obs.exe
• Make a run (Just one run)

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[Tirtha Kshetri]

i want my  SWAT-CUP project to have txt files with parameter values of the best simulation, and i  run the post bat for the best simulation,  and the values in my swat project are not changing , why???

[Ashwin Ghimire]

Hi,

Did you find a solution to this one?

Thanks