surface wave

Surface waves on water are disturbances that move across the surface, distinct from the water particles themselves. These waves are primarily generated by wind. Initially, small "capillary waves" form, which can develop into larger "gravity waves" if the wind persists. The energy for these waves comes from the wind's drag and force on the water.

Wave height is influenced by wind speed, duration, and the distance over which the wind blows (fetch). While oceans experience "swell," lakes typically do not. Waves travel in the direction of the wind and can be reflected by obstacles or refracted by changes in water depth. When waves become too steep, they break, forming whitecaps or surf. Other types of waves include tsunamis (caused by seismic activity) and seiches (standing waves in enclosed basins).12