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Hi,

I made one TOMAWAC run for near-shore wave transformation and wave breaking with 3 m wave at the boundary with the effect of BOTTOM FRICTION DISSIPATION=2, DEPTH-INDUCED BREAKING DISSIPATION=2, WHITE CAPPING DISSIPATION =2.In general a wave will start to break when it reaches a water depth of 1.3 times the wave height.But in my model run the signifcant wave height shows more than 2 m until it reaches the coast and suddenly falling to zero.can some one help me to get the wave transformation over the nearshore area.Here Iam attaching the input and and outPut files used for the run.


Thanks,

Hello,

I had a quick look at your parameter file and I think you made a confusion between period and frequency :

INITIAL PEAK FREQUENCY =5 --> your period is 5 seconds, and your frequency is 1/5 Hz
MINIMAL FREQUENCY =5 --> 1/5
BOUNDARY PEAK FREQUENCY =20 --> 1/20

Regads,

Elodie

Hai,

As your suggestion, I changed the period values in the CAS file to corresponding values in frequency . But I still getting the nonbreaking and non refracted waves at the nearshore region, that is completely absorbed at the zero contour.

Regards,

Glejin

Hi,

Still Waiting for someone's help.

Regards,

lejin

Please try to analyse your problem and tell me all the tests you did to solve it. This will help me give you some advice.

Elodie

Hello,

"I still getting the nonbreaking and non refracted waves at the nearshore region, that is completely absorbed at the zero contour."
=> This is completely normal if you put a free boundary condition, i.e. a condition that absorbs the whole wave energy in your contour.

You can have a look at the § 6.4 and 8.5 of the TOMAWAC documentation for additional informations.

Regards,

Elodie

Hi Elodie,

I was out of station for last few days,so I couldn't replay to your suggestions. Problem with my output was that I was using initial significant wave height (2.5m) more than the boundary wave height(1.0m). So it causes the problem.Now I am getting some results.

In my study location waves are coming form an angle of 240 deg with respect to north at offshore towards nearshore. Is it required to give direction in Radians?,to work in TOMAWAC.currently I am using Tomawac with angle in degrees.

Glejin

Hi Glejin,

That's ok, the directions are expressed in degrees in TOMAWAC. Please be cautious with the convention for expressing the wave propagation direction : "The default convention is the nautical convention (TRIGONOMETRICAL CONVENTION = NO) that locates the propagation direction in relation to the true "North", i.e. the Y axis. The selected direction of rotation is a clockwise direction."

Regards,

Elodie