http://new.mhl.nsw.gov.au/data/realtime/wave/Buoy-syddow

http://new.mhl.nsw.gov.au/img/static/DirectionalSpectra/SYDDOW_dirspec.png

See also the animated version:

Directional spectra plots are able to represent combinations of waves.

Directional spectra plots are able to represent combinations of waves.

They show the direction, so for NSW the wave energy mostly will come from the top right (NE swell) to the bottom (S swell) of the plot. Long period waves are shown towards the outside of the plot, and short period waves are towards the centre.

The graphic expresses all the waves in terms of their power. Wave power is proportional to the wave period and to the square of the wave height.

The graphic expresses all the waves in terms of their power. Wave power is proportional to the wave period and to the square of the wave height.

This single measure replaces the more familiar double measure of wave height and period.

The measure is energy density m2/deg.Hz

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From Wikipedia:

Here power is expressed in kilowatts of power potential per meter.

en.wikipedia.org/wiki/Wave_power

In deep water where the water depth is larger than half the wavelength, the wave energy flux is

with P the wave energy flux per unit of wave-crest length, Hm0 the significant wave height, T the wave period, ρ the water density and g the acceleration by gravity.

When the significant wave height is given in metres, and the wave period in seconds, the result is the wave power in kilowatts (kW) per metre of wavefront length.

Example: Consider moderate ocean swells, in deep water, a few km off a coastline, with a wave height of 3 m and a wave period of 8 seconds. Using the formula to solve for power, we get

meaning there are 36 kilowatts of power potential per meter of wave crest.

In major storms, the largest waves offshore are about 15 meters high and have a period of about 15 seconds. According to the above formula, such waves carry about 1.7 MW of power across each metre of wavefront.

Look, we will sort this out and get back to you. Feel free to comment if you can.

**Wave power formula**Here power is expressed in kilowatts of power potential per meter.

en.wikipedia.org/wiki/Wave_power

In deep water where the water depth is larger than half the wavelength, the wave energy flux is

with P the wave energy flux per unit of wave-crest length, Hm0 the significant wave height, T the wave period, ρ the water density and g the acceleration by gravity.

When the significant wave height is given in metres, and the wave period in seconds, the result is the wave power in kilowatts (kW) per metre of wavefront length.

Example: Consider moderate ocean swells, in deep water, a few km off a coastline, with a wave height of 3 m and a wave period of 8 seconds. Using the formula to solve for power, we get

meaning there are 36 kilowatts of power potential per meter of wave crest.

In major storms, the largest waves offshore are about 15 meters high and have a period of about 15 seconds. According to the above formula, such waves carry about 1.7 MW of power across each metre of wavefront.

Look, we will sort this out and get back to you. Feel free to comment if you can.

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