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Dear all,

I modelling the tide one month in July 2011 in Sea of VietNam .

But the result is not good as the attached picture.

I used the coffient as follow
COEFFICIENT TO CALIBRATE TIDAL RANGE : 1.18
COEFFICIENT TO CALIBRATE SEA LEVEL : 0.166

How can i increase the modelling time faster rhythm?

Please give your advices.

Many thanks

Hoa.

Hi
Look like there is only a time shift between observed and computed.
Check this point.
In Telemac for tide forcing, the time is probably UT so you could have to just adjust this parameter in the comparison of results and observation

Regards

Hi c.coulet,

Thanks much.

You mean change the parameter of COEFFICIENT TO CALIBRATE TIDAL VELOCITIES from 1 to 1.1.

I will check, do you think it related to "friction cofficient". Can it related to the velocity of tide tranfer?

Hi
No I just think about the time of measurement and the time in the result file...
According to what I could see in your image, I think there is just a time shift.
As I wrote, telemac computation is made in UT. As Vietnam is UT+7, I think your measurement are in "local" time.

In the excel result file, try to shift the result by adding 7h or change the measurements to have it in UT and look the updated graph

regards

Hi c.coulet,

That's right. It's good result now. But I would like to adjust in Telemac not excel. Can you help me how can I adjust the UT parameter. I can't find the solution now.

Thanks very much.

Hi
I'm not sure it's possible in Telemac without user fortran modification.
Look into the tide computation and add the shift in the time parameter will probably do the job but it needs some fortran knowledge...

Regards

Hi c.coulet,

I have knowlegde by fortran programming.

But I don't know what code can be adjust UT parameter.

Can you give the example code.

Either with simple way, can I run modeling with the up boundary (discharge boundary) add time later 7 h more to run. Do think it will right the hydraulic result of river.

Thanks you.

Hi
I don't have any example as I always choose to work in Universal Time.
On the second point, it depends on what you really want to simulate...
If you want to adjust the peak discharge of a flood with the high water of a tide, it's possible to adjust the time/discharge law...

If it's just to check the calibration of the computation, you shift the time value in Excel and there is nothing else to change...

The only thing you have to keep in mind is:
The simulation time is the Universal Time

Regards