基于近岸水域波浪视频图像特性分析的非线性水深反演法

Bathymetry in the nearshore changes continuously under energetic interactions with shoaling and breaking waves. A large storm can bring about significant changes of the nearshore bathymetry on a time scale of an hour. Nearshore bathymetry is required to describe depth-induced wave changes and large-scale fluid motions. The evolution of nearshore bathymetry will be predicted based on current bathymetry and nearshore hydrodynamics. Depth inversion methods by remote-sensing have been de- veloped to cover a large span of spatial and temporal scales, substituting conventional labor-and-time intensive in-situ bathymetry survey methods. However, earlier depth inversion methods have limitations at estimating bathymetry accurately in the surf zone because of image noise due to foam induced by wave breaking in the surf zone.