Río de la Plata

　　    The Río de la Plata is situated between Uruguay and Argentina in South America. In Spanish, “La Plata” means “silver.” It is the second-largest river in South America, stretching 4,700 kilometers in length with a drainage basin of approximately 4 million square kilometers. In fact, the Río de la Plata itself is only 320 kilometers long, as it is formed by the confluence of several major tributaries from Brazil, Bolivia, Uruguay, Paraguay, and Argentina.

　　    The Río de la Plata has two main sources: an eastern source and a western source. Both originate from the southeastern edge of the Brazilian Highlands. The eastern source is called the Grande River (Río Grande), and the western source is called the Iguazú River (Río Iguazú). After meeting at 20 degrees south latitude, the two rivers are collectively referred to as the Paraná River. The Paraná River stretches 4,000 kilometers in length with a drainage area of 2.8 million square kilometers. Along its course in Argentina, the Paraná River receives an important tributary—the Paraguay River. The Paraguay River originates from the southeastern part of the Brazilian Highlands near the Paré Mountains in southwestern Brazil, spanning 2,200 kilometers in length with a drainage basin of 115,000 square kilometers. Certain sections of the Paraná River form parts of the international borders between Brazil, Paraguay, and Argentina. Further north, near Buenos Aires, the Paraná River is joined by the Uruguay River, which is 1,609 kilometers long and drains an area of 327,000 square kilometers. From this point onward, the river is called the Río de la Plata.

　　    Although the actual length of the Río de la Plata is only 320 kilometers, its width reaches up to 50 kilometers, and at its mouth, it can be as wide as 230 kilometers, making it the widest river in the world. Its depth is about 18 meters, allowing navigation for large ships. The capital of Uruguay, Montevideo, is built on the northern bank near the river’s mouth.

　　    The Río de la Plata basin actually encompasses the areas through which the Paraguay River, the Uruguay River, the Paraná River, and the Río de la Plata itself flow. It is one of the most developed regions in Latin America. Most of the basin lies in the subtropical zone, blessed with abundant rainfall, fertile land, and rich resources. It serves as the economic hub of South America, with major cities and ports such as Buenos Aires, La Plata, Rosario, Santa Fe, Montevideo, and Paysandú located along its banks.

　　 Buenos Aires, Argentina