![]() ![]() ![]() Despite all the warnings, the world's most powerful tidal bores have already claimed several lives.īecause they're rare and extremely violent, they are often mistakenly seen as tsunamis. This turbulent wave phenomenon generates a roaring noise that can be heard far away. These tide-influenced waves are so violent that they tear vegetation and bring up sediments and sand from the bottom of the river, changing its colors from green and blue to chocolate-brown. They can blast roads, smash small houses, and wreck cars and landmarks. Tidal bores can have powerful and destructive consequences, especially in the margins of the rivers. In most cases, a bore will feature a single-breaking wave that travels at speeds of up to 25 miles per hour (40 km/h).īut it can also be comprised of a leading-edge wave followed by secondary and smaller rollers. As a result, there are only around 60 tidal bores on the planet. A tidal bore, also known as a surge, is a massive and often single wave caused by the constriction of an incoming spring tide as it gets funneled up a narrow and shallow river.īores are relatively rare and usually only occur in regions with a tidal range of more than 20 feet, i.e., in areas where there are huge water level differences between low and high tide.Īs the set of waves funnels into a narrow river, bay, or lake, they accumulate energy and accelerate against the natural direction of the stream.Ī tidal bore will only occur when the tide is rising (flood tide) and never when the tide is falling (ebb tide). ![]()
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