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Uruguay River

geography Maturity 7-9 Next article →

The Uruguay River is a major river in South America.

Riodelaplatabasinmap
Riodelaplatabasinmap

It flows from north to south through many lands. This river forms parts of the borders for Brazil, Argentina, and Uruguay. It starts in the Serra do Mar in Brazil. The river begins where the Canoas and Pelotas rivers join together. At its start, the water flows through uneven and broken land. This creates many rapids and falls along the way.

One very unusual feature is a submerged canyon. This canyon formed during the Ice Age. Back then, the climate was much drier. The river was also much narrower than it is today. The canyon is quite deep below the river bottom. It is between one-eighth and one-third as wide as the river. You can see this canyon at the Moconá Falls.

Mocona2
Mocona2

These falls are special because they run parallel to the river. Most waterfalls run across the water instead. The falls are up to 3 km wide. They are not visible for 150 days each year.

People have lived near this river for a long time. The name likely comes from the Guaraní language. Some think it means "the river of the uru," which is a bird. Others think it refers to a small creature called an uruguá. The river is very important for making electricity. Huge dams like the Salto Grande Dam catch the water. These dams help create hydroelectricity for the people nearby. The river also has many large tributaries. One main one is the Río Negro, which flows for 500 km.

There are many ways to cross the water. Five international bridges connect the different countries. These include the Integration Bridge and the Salto Grande Bridge. Some bridges were built many years ago. For example, the Alvear-Itaqui Bridge was built in 1945. The Salto Grande Bridge was finished in 1982. These bridges allow for much more travel and trade. They link the provinces and states together. They help people move between Argentina, Brazil, and Uruguay.

Sometimes, people have disagreements about how to use the river. In 2005, there was a conflict about building pulp mills. People in Gualeguaychú, Argentina, protested against these plants. They were worried that the mills would pollute the water. This led to a big diplomatic crisis between the two countries. The matter even went to the International Court of Justice. In 2010, the court ruled that the mills did not pollute the river. Now, the countries work together using a joint commission. This helps them coordinate activities on the water.

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File:Mocona2.jpg
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