open TELEMAC-MASCARET The mathematically superior suite of solvers

Is it possible to model depth dependent Manning's n for bottom friction? If not, could you advise which subroutine I should edit to achieve this?

Thanks,

Hailiang

Hi Hialiang,

If I'm not wrong for the LAW OF BOTTOM FRICTION 4: Manning-n depth is taken into account.

Calculation is done in friction_calc.f case 4

Patrick

Thanks Patrick. I do not see it is calculated in subroutine friction_calc.

I did not see a place (case file or others) to input a depth vs Manning's n relationship.

Hailiang

You'll find it in the source files:

C:\yourtelemacdir\v7p3r0\sources\telemac2d\friction_calc.f

Dear Patrick,
I can't find a approach for a depth depending friction law in the subroutine friction_calc.f.

Is there actually a way to model witch depth dependent friction values?

Thanks
Thomas

Hi Thomas,
I read your message too fast I guess, so you would like to describe n as a function of the depth?

In that case I believe you have to program it yourself (I have not done this, so someone else should provide you with better pointers than me).

Sorry,
Patrick

Hi Patrick,
Thanks for your fast reply. Yes I (and I think Hailang too) want to implement a funktion for waterdepth dependend friction values (because the friction is much higher in shallow water than in deeper water).

If there is no such approach in Telemac yet, I will manually implement such function in the friction_calc.f subroutine.

Many thanks
Thomas

Hi Thomas,

did you write the subroutine to describe the depth-variable Manning?

Thanks