Tidal Power In The Bay Of Fundy

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Tidal Power In The Bay Of Fundy Essay, Research Paper Environment Report: Tidal Power In The Bay of Fundy Prepared for Bill Andrson Professor at St.Lawrence College for Environmental Science. By November 22,1996 INTRODUCTION The Bay of Fundy, which is found off the shores of Nova Scotia, has the highest tides in the world . Extraordinary tides occur when the tidal wave length is two to four times the length of the Bay. By virtue of blind luck or physics, the tide is amplified into a standing wave, like water sloshing in a bathtub. For a breaking wave to form, the surging tide must meet an obstacle. When the ocean meets the river going in the opposite direction, the sea hesitates, piles up behind the front line, and advances anew in a tidal bore. Usually the ingredients occur

during a new moon with 15 feet tides and the opposing force of the Shubenacadie river to display the true Bay’s magnificence. This part of St. John is divided into 3 main areas: the main Harbor, Courtenay Bay and the Outer Harbor. These areas are influenced by the Bay of Fundy tides and the currents of the St John River which flow out of the main Habour into the Bay. This section also experiences two high and two low tides each day (semi - diurnal), with a tidal range varying from 15 to 18 feet, depending on the type of tides. High – water heights vary from 22 to 28 feet and low – water heights vary from 0 to 7 feet above chart data. Because of these semi – diurnal tides and the action of the St John River, slack water in the Habour occurs at approximately tides and not

at high or low water as would be the case at other parts. THE RHYTHMIC RISE AND FALL In the Bay of Fundy, the tides are spectacularly large. While the rise and fall of sea level due to tides is the most apparent aspect, it is also the tidal currents that direct magnification of tides, and the sea level rises or declines are due to resulting convergences and divergencies. These tides rise and fall over a range that is greater than 50 feet; such massive water movement combined with accumulation of sediment through erosion has built up a large salt marsh that is a feeding station for migrating shore birds. The low fundy also feeding a ground for marine life including whales. A long time ago between about 15000 and 10000 year ago at the glacier retreated from the last ice age, part

of Georges Bank were dry land. Such as fragment of trees and mammoth teeth from this are still found occasional in fishing travels. The sun and the moon are the only important celestial bodies in producing Terrestrial tides. While the moon is much smaller than the sun, it is nevertheless more important for tidal processes, because of its proximity to the earth. There is a small imbalance between the centrifugal force and the gravitational attraction of the moon on the water column that gives rise to horizontal forces, causing water motion that causes two bulges in the sea surface. One immediately under the earth, and the other on the other side of the earth. These bulges tend to rotate around the globe along with the moon resetting in semi-diurnal tides with a period of half a

lunar day (12.4 diurnal hours) even though the earth’s rotation is a diurnal period of 24 hours. PROLOGUE The Bay of Fundy is an area of about 1.6(100000 Km2). The Bay of Fundy is a part of the Continental Shelf off eastern Canada and New England. It also serves as an extension that divides New Brunswick from Western Nova Scotia. At the Bay of Fundy’s tidal river at the Southwestern tip of Nova Scotia, sea water overflows the other riverbank in spring to deposit loads of North Atlantic Salt twice daily. In the tidal river, fresh water and salt water are mixed. Fundy of Bay is famous for its tides which is the best and highest in the whole world. The marsh is a home to mammals, a breeding place for birds and a feeding ground for estuary fish. It is a land that leaves even the