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Hi community,

I already made a T2D model of an urban area which model runoff of triangular rainfall using the prosou.f subroutine.

Now, I'd like to model a watershed with urban area but also woods, fields, etc...
My problem is that the amount of runoff is not the same for urban area than for wood. I cannot use a mean rainfall because it will not respect the different production of each area.
So my question is :

Is there a way to use different Rainfall-Runoff coefficient in telemac ? (Something like a percentage of the rainfall).

I see two way possible for this :

A subroutine in fortran ? (but i will have to use often this kind of model and i think is not easy to determine different areas in fortran).

Add the coefficient with the Mesh (using Blue Kenue, exactly as manning coefficients). In this case, is there a way to get the parameters of a layer create by blue kenue to use it ?

Thanks for your help

JP

Hello,

You can have space-varying rainfall if you program it in prosou.f, as the rainfall is an array (PLUIE%R) of values inside telemac-2D, is that your question ?

It could also be done like the friction that can be read in the geometry file (see subroutine FONSTR in library bief, how subroutine find_in_sel is called).

The zonation process used for parameter estimation and friction could also be used : a file giving a zone number for every point, that could be used in prosou. It will be treated in parallel in the next version.

Regards,

JMH

Thanks for your answer,

I will try with the FONSTR subroutine

Best Regards

JP