Río de la Plata: Map & History
The Río de la Plata, also called the River Plate or La Plata River in English, is the estuary formed by the confluence of the Uruguay River and the Paraná River at Punta Gorda.
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The Río de la Plata, also called the River Plate or La Plata River in English, is the estuary formed by the confluence of the Uruguay River and the Paraná River at Punta Gorda. It empties into the Atlantic Ocean and forms a funnel-shaped indentation on the southeastern coastline of South America. Depending on the geographer, the Río de la Plata may be considered a river, an estuary, a gulf, or a marginal sea. If considered a river, it is the widest in the world, with a maximum width of 220 kilometres (140 mi).
Modern Countries Once Part of Río de la Plata
At its mapped extent, Río de la Plata covered territory in 3 present-day countries. The period shown is when the mapped borders include that country, and the note says how much of it.
States and Provinces
Largest Present-Day Cities in Its Territory
Each opens on the live map inside Río de la Plata's borders of that time.
Derived by testing mapped cities against this polity's dated territorial polygons, so the list is indicative and follows the borders in the source dataset.
Río de la Plata in Depth
History
Nomadic aboriginal people inhabited the Río de la Plata region for thousands of years before European settlers arrived, and their descendants continue to live in the region to this day.
The Río de la Plata was first explored by the Portuguese in 1512–13. The Spanish first explored it in 1516, when the navigator Juan Díaz de Solís traversed it during his search for a passage between the Atlantic and the Pacific Oceans, calling it the Mar Dulce, or "freshwater sea".
Geography
The Río de la Plata begins at the confluence of the Uruguay and Paraná rivers at Punta Gorda and flows eastward into the South Atlantic Ocean. No clear physical boundary marks the river's eastern end; the International Hydrographic Organization defines the eastern boundary of the Río de la Plata as "a line joining Punta del Este, Uruguay and Cabo San Antonio, Argentina".
Though it is generally spoken of as a river, the Río de la Plata is considered by some geographers to be a large bay or marginal sea of the Atlantic Ocean. For those who regard it as a river, it is the widest in the world, with a maximum width of about 220 kilometres (140 mi) and a total surface area of about 35,000 square kilometres (14,000 sq mi).
Hydrology
The Río de la Plata behaves as an estuary in which freshwater and seawater mix. The freshwater comes principally from the Paraná River (one of the world's longest rivers and La Plata's main tributary) as well as from the Uruguay River and other smaller streams. Currents in the Río de la Plata are dominated by tides reaching to its sources and beyond, into the Uruguay and Paraná rivers. Both rivers are tidally influenced for about 190 kilometres (120 mi). The tidal ranges in the Río de la Plata are small, but its great width allows for a tidal prism important enough to dominate the flow regime despite the huge discharge received from the tributary rivers.
Sections adapted from Wikipedia: Río de la Plata (CC BY-SA 4.0).
Río de la Plata: Frequently Asked Questions
When did Río de la Plata exist?
Río de la Plata is dated to 1811 CE – 1833 CE, in the Industrial era.
How large was Río de la Plata at its peak?
At its peak in 1811 Río de la Plata covered about 1,678,494 km².
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