Information AboutTidal Bore |
| CATEGORIES ABOUT TIDAL BORE | |
| tide | |
| fluid dynamics | |
| wave mechanics | |
| fresh water surfing | |
| SHOPPER'S DELIGHT | |
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, Alaska]] A tidal bore (or just '''bore''', or '''eagre''') is a Tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travel up a river or narrow bay against the direction of the current. As such, it is a true ''tidal wave'' (not to be confused with a Tsunami ). Bores occur in relatively few locations worldwide, usually in areas with a large tidal range, and where incoming tides are funnelled into a shallow, narrowing river via a broad bay. The funnel-like shape not only increases the height of the tide, but it can also decrease the duration of the flood tide down to a point where the flood appears as a sudden increase in the water level. Bores take on various forms, ranging from a single breaking wavefront—effectively a Shock Wave —to ‘undular bores’ comprising a smooth wavefront followed by a train of solitary Waves ( Solitons ). Larger bores can be particularly dangerous for shipping, but also present a challenge to Surfers . The word bore derives through Old English from the Old Norse word ''bara'', meaning a wave or swell. Rivers that have been known to exhibit bores include: ASIA
SOUTH AMERICA
NORTH AMERICA
Most rivers off the upper Bay of Fundy between Nova Scotia and New Brunswick have tidal bores. These include the River Hebert and Maccan Rivers, the St. Croix River in the Minas Basin, and the Salmon River in Truro. EUROPE
AUSTRALIA SEE ALSO |