value of TLAPS and PLAPS

[Naeem Saddique]

Dear all,

I am doing calibration in snow fed basin.According to Dr Karim first fix value of TLAPS and PLAPS then other parametrs,  what range of values i should used for both parameters.according to swat absolute its ranges are following.

PLAPS         -1000    1000      Precipitation lapse rate.

TLAPS         -10    10        Temperature lapse rate.

is this ok??

thanks

[Karim Abbaspour]

Those values should be edited by users. TLAPS is around -6 oC/km. So I would use -9  to -4

PLAPS could be more variable depending on where you are. I would initially try 0 to 100 mm.

Karim 

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[Naeem Saddique]

Thank very much sir...my basin elevation 700-5000m...what you recommend for plaps. 

Thanks 

[Karim Abbaspour]

Try 0   100

Karim

[Naeem Saddique]

sir i get these results by using plaps and tlaps you suggest, now i should continue or increase the range. i think p and r factor are not good

Naeem Saddique

[Karim Abbaspour]

You cannot calibrate the model just with these two parameters. You fix their values now to the best values you obtained and calibrate for the snow parameters next, then fix those parameters and go to flow parameters.

Karim

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