Spatial evolution equation of wind wave growth

Based on the dynamic essence of air-sea interactions, a feedback type of spatial evolu-tion equation is suggested to match reasonably the growing process of wind waves. This simple equation involving the dominant factors of wind wave growth is able to explain the transfer of en-ergy from high to low frequencies without introducing the concept of nonlinear wave-wave interac-tions, and the results agree well with observations. The rate of wave height growth derived in this dissertation is applicable to both laboratory and open sea, which solidifies the physical basis of using laboratory experiments to investigate the generation of wind waves. Thus the proposed spa-tial evolution equation provides a new approach for the research on dynamic mechanism of air-sea interactions and wind wave prediction.