In the commune of Vayres, in the Libournais, go to Saint-Pardon.Several places are good for getting a view of the tidal bore in Gironde: Technical advice as I am not a surfer myself, turn and ask the competent people (follow the surf boards on the roofs of the cars! ) ) It is not every day that we can surf so long, with ease, without paddling at all to reach the wave! I cannot give you any The tidal bore is a wave and like all the good waves, it is an invitation to surf! Surfers, kayakers, paddle-boarders, longboarders, canoeists and even jets skiers enjoy surfing on the tidal bore. We suggest watching this super video from : The wave of the tidal bore is mysterious, impressive, spectacular, and it gives ideas to the surf sport enthusiasts. When it is shallower or the banks are wider, the waves slow down, and also when the banks are larger. They move at 15 to 30km/h depending on the areas. At the place where the banks narrow, into a sort of bottleneck, the wave creates itself! It is not only one wave, there are several, from 5 to 10 depending on the size of the tidal range. In general, tidal bores are at their strongest during spring tides, slightly more extreme tides that occur during full and new moons.The tide rises, the dominant winds push the flood tides, which depending on the slope and roughness of the ground, concentrates and grow. That’s enough sand to fill a box 2.6 miles to a side.Īccording to CCTV, China’s state-operated television network, the best time of year to see the Qiantang bore is midway through the eighth month on the Chinese lunar calendar, which happens to fall this year during mid-October. Over the years, the Qiantang’s bores have constructed a massive complex of sandbars with an estimated total volume of 42.5 billion cubic meters. These walls of water pack extraordinary power. As high tides enter the bay, they’re funneled in toward the river's mouth, spawning massive high tides and especially strong tidal bores. The Hangzhou Bay, into which the Qiantang river empties, is more than 60 miles across at its mouth, but it narrows to a gap less than 13 miles across where it meets the Qiantang. The estuary’s structure is textbook bore material. And as National Geographic reported in 2005, some bores in the Amazon have become tourist attractions, as thrill-seeking surfers try to ride them upriver. The Lupar Benak bore in Sarawak, Malaysia, nearly drowned the British author Somerset Maugham during a 1949 visit. Each year, the U.K.’s Severn River sees some 250 bores move upriver. Some tidal bores have global reputations for their beauty and destructive power. Eventually, the wave breaks-and a bore is born. As it encounters shallow water, the crest of the wave moves faster than its trough, sharpening its peak. Bore-bearing rivers also need to experience large swings in water level between high tide and low tide in their estuaries, where the river and sea meet and mix.Īs high tide rolls into one of these bore-prone estuaries, the influx of water becomes more confined as it moves upriver. "Two principal factors affect the size and strength of bores … the magnitude of the tidal range and the shape of the river at its estuary,” said Victor Miguel Ponce, a professor in the civil and environmental engineering department at California's San Diego State University, in a 2005 interview with National Geographic.īarring extreme weather conditions, bores form only when a river’s mouth is shallow, uniform, and resembles a funnel. More than 80 rivers around the world have tidal bores, according to one widely-cited 1988 catalog. While this phenomenon may look like a tsunami, it’s actually a tidal bore, a wave that flows upstream in some rivers as high tide approaches. On October 6, more than a hundred thousand tourists gathered on the banks of China’s Qiantang river to witness an extraordinary sight: a wall of water several feet tall racing its way upriver.
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