Fluvial island macareo (Venezuela)
The word macareo designates a rapid and noisy wave of the waters in a river course that ends at the sea, due to the irruption of the marine waters during the tides in its phase of high tide and is the term used in the delta of the Orinoco river in Venezuela to the northeast of South America. The most conspicuous "macareo" is the call in the Tupi-Guarani language "Pororoca", a rumble that occurs at the mouth of the Amazon River. Some bibliographical sources also indicate that this name macareo is of Asian origin, brought by the Portuguese from India to the Amazon and from here it was introduced in the Spanish language to designate a similar phenomenon. It is the most important mouth of the Orinoco and constitutes the southernmost arm. Its width is considerable and should rather be considered as a true estuary rather than the arm of a delta. And here is the explanation of the phenomenon: in La Boca Grande, the combined effect of the tides, the currents and the river's own flow (it is the largest arm or pipe of the delta) mean that, during the ebb, it is cleaned , expand and deepen the channel. in the Orinoco Delta.
