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A tidal river is a river, or more typically a stretch of a river, whose flow and level is influenced by tides. An example of a tidal river is the portion of the Connecticut River flowing from Windsor Locks, Connecticut, to the Atlantic Ocean. The Brisbane River, which flows into the Pacific Ocean from the east coast of Australia, is also a tidal river.
Generally, tidal rivers are short rivers with relatively low discharge rates but high overall discharge; generally this implies a shallow river with a large coastal mouth. In some cases, high tides impound downstream flowing freshwater, reversing the flow and increasing the water level of the lower section of river, forming large estuaries. High tides can be noticed as far as 100 kilometres (62 mi) upstream. The Coquille River is one such stream where this effect can be noticed.
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the tail reaches of the river adjoining the oceans are affected by the tides in the ocean and the ocean water enter the river during the flood tide and goes out into the oceans during the ebb tide.Then the water level of the river rise and fall.
Tidal effect is witnessed in Hooghly river, India and Meghana river Bangladesh (continuation of Ganga river India
Mahanadi delta is Odisha state of India probably also experiences tides to some extent