Применение картографического метода исследования подводных песчаных гряд для целей навигации

Аннотация

The author subdivides the Norfolk sand ridges of the North Sea into three morphological assemblages. Dynamics of these macro- and mesoforms is considered using the comparison of maps of the same scale dated from 1956 to 1980. The dynamics within the scope of the time interval is of pulsation type, the processes being mostly reversible: shortening gives place to lengthening, dissection into separate links follows coalescence into horseshoe landforms, erosion follows the mesoforms growth and migration. The tidal current regime is proved -to be steady through years, only systems of non-periodical (remanent) components of total currents being changed. Zones of hydrodynamical activity correspond to morphological complexes, the former being under control of maximum speed of currents and pattern of the tidal current vectors roses.