Читать книгу The Great Thames Barrage - Thomas Walter Barber - Страница 8
Tidal Wave.
ОглавлениеThe curved lines (in various forms of dotting) represent the levels of the surface of water at various states of Spring tides and clearly show the tidal wave which ascends the river and by its momentum and volume raises the high-water level at the upper end several feet above that at Gravesend.