sensitivity analysis in SWATCUP

[Sheila]

All,

I read on the ARCSWAT Google group that the newest version of SWAT does not include sensitivity analyisis. I have not gone to the new version of SWATCUP. But how do you then limit the parameters that you use for calibration since SWATCUP does the Sensitibity analysis and calibration at the same time (at least in the 313 version of SWATCUP)??  Before I ran sensitivity in ARCSWAT.  I picked the parameters that were most sensitive and used them for calibration in SWATCUP.

 

Thanks,

Sheila

[S.Z.Samadi]

Sheila,

In the SWAT new version they moved all those stuffs to SWATCUP!

Just work with SWATCUP and change your parameters ranges (for SUFI).

Best,

S

[Sheila]

Hi Sam,
Yes.  I know they moved everything to SWATCUP, but how do you limit the number of parameters for calibration?  I am more concerned about the number of parameters rather than the ranges.  Maybe I should look at the newest version of SWATCUP.

Thanks.
Sheila

[Karim]

You write the parameters you want to calibrate in a file along with their ranges... Why don't you get the program and look at it. It is free!

Best,

Karim

[S.Z.Samadi]

Hi Sheila,

Number of parameters depends on your watershed condition. If I was I would try to understand my watershed hydrological processes, even understand all my subbasins hydro process and find which subbasin assign more weights to flow generation! try to study same research papers which studied in the same hydro/soil/land use systems (particularly Dr Karim's papers) and check all their parameters for your case, you should be able to  match up with your watershed condition in a case of stream flow (I amnot sure if it is your case) simulation! 

In my case, I never included snow parameters in the model process as we dont get snow over my watershed. But I included ground water parameters which contribute to river flow in dry periods. Field based experience can give you more idea about watershed behavior as well. 

Hope this gets you started.  

Best,

S

aHi Sam,