Colorado River of Argentina
The Colorado River (Spanish: Río Colorado) is a significant waterway located in the center of Argentina. Originating in the high altitudes of the Andes, it serves as a critical lifeline for the arid regions it traverses, eventually carving its way across the landscape to reach the Atlantic Ocean.
Beyond its ecological importance, the river plays a key role in Argentine administration, marking much of the political boundary between the provinces of Neuquén and Mendoza, as well as between Río Negro and La Pampa.
[ไม่มีภาพประกอบ]Key Facts
- Source: Eastern slopes of the Andes, Argentina.
- Mouth: Atlantic Ocean (Unión Bay).
- Total Length: Approximately 1,114 km (692 mi).
- Basin Size: 294,076 km² (113,543 sq mi).
- Average Discharge: 130 m³/s (4,600 cu ft/s).
- Navigability: Up to 300 km (190 mi) inland for vessels with a draft of up to 2 meters.
Course and Geography
The river begins on the eastern slopes of the Andes at an elevation of 2,186 meters (7,172 ft), situated at the same latitude as the Chilean volcano Tinguiririca. From its source, the Colorado follows a general east-southeast trajectory.
As it leaves the Andean region, the river flows through barren, arid territories. While much of the surrounding land is dry, the bottom lands of the Colorado in Patagonia are fertile and wooded, though they are too small to support a large population. The river eventually reaches the Atlantic Ocean through a delta in the Unión Bay, located roughly 100 to 120 kilometers south of Bahía Blanca.
Tributaries and Basin Features
The river's naming and structure are often discussed in terms of its tributaries. While some describe the Colorado as forming from the confluence of the Grande and Barrancas rivers, it is more accurate to view the Grande as the main stem. The Barrancas is a smaller stream that joins the Grande; below this confluence, the river is known as the Colorado.
The Río Desaguadero (or Salado River) is a notable left tributary. If the Río Desaguadero is included in the calculations, the total length of the river system extends to nearly 2,000 kilometers (1,200 mi). Additionally, the river once served as an outlet for the now-closed lake basin of Laguna Urre Lauquen.
Infrastructure and Utility
To manage the challenges of the arid environment, the Embalse Casa de Piedra was constructed. This man-made dam serves two primary purposes: generating hydroelectricity for the region and regulating the river's water levels to ensure a more consistent supply for the surrounding territory.
| Feature | Detail |
|---|---|
| Source Elevation | 2,186 m (7,172 ft) |
| Mouth Elevation | 0 m (0 ft) |
| Length | 1,114 km (692 mi) |
| Basin Area | 294,076 km² |
| Average Discharge | 130 m³/s |
| Navigable Length | ~300 km |
Frequently Asked Questions
Which provinces does the Colorado River border?
The river marks most of the political boundaries between Neuquén and Mendoza, as well as between Río Negro and La Pampa.
What is the purpose of the Embalse Casa de Piedra?
The dam is used to generate hydroelectric power and to regulate the water levels of the river as it passes through an arid region.
Is the Colorado River navigable?
Yes, it is navigable for vessels with a draft of up to 2 meters (7 ft) for approximately 300 kilometers (190 mi) from the coast up to Pichi Mahuida.
How is the river's name determined?
The river is known as the Grande above the point where the Barrancas stream joins it, and it is called the Colorado below that confluence.
Where does the Colorado River empty?
The river ends in the Atlantic Ocean, flowing through several channels of a delta in the Unión Bay.