TIDAL BORE

Abstract

A tidal bore, or a bore, is a true tidal wave of water that travels up a narrow bay or a river against the direction of the current. It follows the tide in the sea which the river flows into. Bores usually occur in areas with a large tidal range where incoming tides are funneled into a shallow, narrowing river via a broad bay. They take various forms and heights. High bores are attractive points of interest to tourists and popular sites for river surfing. Among best known bores are those on the Qiantang River in China, on the Amazon River in Brazil, and on the River Severn in Great Britain. Due to an apparent similarity, the bore phenomenon can be confused with a tsunami.