Breaking waves in 100-year storm

[buoy]

We are considering different water depths for deploying a moored structure which must survive a 100-year storm. I am concerned that in the shallower depths (>25 m), survival loads will increase because more of the large waves will break and 'slap' the structure (greenwater).
1) Are there standard metrics to describe how much wave breaking is occurring, such as the percentage of waves that are breaking?
2) Can you point me to a general reference on designing to account for breaking waves in 100-year storm?

 

[weab]

I thought that breaking waves generally apply less lateral load. It's been a while since I had to do this. You could look at the API specs (American Petroleum Institute). Perhaps Recommended Practice 2A (RP 2A) ?

 

[buoy]

If you have a structure like a piling, I believe the worst load scenario is when a wave breaks right in front of it, generating a surging wall of water that 'slaps' the piling. That is why I am worried about increasing the occurrence of breaking waves in a 100-year storm if we deploy in relatively shallow water (30 m depth). I would imagine the increased occurrence of breaking would increase the survival loads, but would love a reference or someone's experience.