Wavelet transform is a particularly useful tool to characterize transient p
henomena such as wave breaking. In this paper, we apply wavelet transform t
o the detection and quantification of the breaking waves, We use a new meth
od that uses the local properties of wavelet transform to detect and quanti
fy the breaking waves and give some new breaking criteria. By comparing thi
s method with the classic method, we find that wavelet transform is very ef
fective in the detection of breaking waves. With wavelet transform, a set o
f measured wind wave data is investigated. The results have revealed some p
reviously unknown phenomena about wave breaking.