8/2/2023 0 Comments Tidal bore![]() ![]() The River Dee has a tidal bore which attains heights of between one to two meters which can travel up to sixteen miles inland from Connar's Quay in Flintshire, Wales, where it's five mile wide estuary narrows to a mile wide channel, sending waves surging through to Chester Weir in the City of Chester in Cheshire, England. There are only around sixty of these phenomena in the world, eleven of which occur in the United Kingdom, which between them produce tidal bores of varying heights and speeds, one of which is the second largest in the world, that of the River Severn. These two annual tides are further reinforced during the period of the full moon or the new moon phases, leading to the highest of all tidal bore waves. The largest annual tides occur around the times of the Spring Equinox in the month of March and the Autumn Equinox during the month of September. ![]() High tides occur during the phases of a full moon or new moon, when the gravitational force of both the sun and the moon reinforce one another. ![]() Tidal bores can occur on a daily basis, but they are at their highest during times of very high tides. Tidal bores, also known as tidal surges, river bores or aegirs, occur when a shallow river with a narrow sea outlet, situated on a wide, flat estuary, surges upstream against the natural flow of the river's current, causing the incoming tide to form a wave, or a series of waves. ![]()
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