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Ash from Puyehue Volcano Over Neuquén and Buenos Aires, Argentina – June 17th, 2011

37.4S 65.3W

June 17th, 2011 Category: Volcanoes

Chile and Argentina - June 13th, 2011

Close-up of Volcano

Ash from the 2011 Puyehue volcanic eruption, which began on June 4th, spreads from Chile, across Argentina, and out over the Atlantic Ocean.

The ash has precipitated over the Argentine cities of Villa la Angostura, Bariloche and the northern part of Chubut province.

Here, the ash cloud veils reservoirs by the confluence of the Neuquén and Limay Rivers in Neuquén province.  It reaches eastward to Bahía Blanca, and northeast to Buenos Aires, where it can be seen in the skies over the sediment-laden Rio de la Plata estuary.

 

Nahuel Huapí and Traful Lakes, Argentina – March 9th, 2011

41.1S 71.3W

March 9th, 2011 Category: Image of the day, Lakes, Mountains

Argentina - February 18th, 2011

This orthorectified image focuses on two lakes in the foothills of the Patagonian Andes, in Argentina: Nahuel Huapí Lake (left) and Traful Lake (top center).

Nahuel Huapí Lake is located between the provinces of Río Negro and Neuquén, in Argentina. It has a surface of 529 km2 (204 sq mi), rests 2,510 feet (770 m) over the sea level, and has a maximum measured depth (as of 2007) of 1,437 feet (438 m). The lake depression consists of several glacial valleys carved out along faults and Miocene valleys that were later dammed by moraines.

Traful Lake is a lake in the Argentine province of Neuquén with an area of 70 km². The lake is the starting point of the Traful River that empties into the Nahuel Huapí Lake.

Ezequiel Ramos Mejía Reservoir in Neuquén, Argentina

39.2S 68.7W

February 10th, 2011 Category: Lakes, Rivers

Argentina - February 1st, 2011

Several reservoirs in the Argentine province of Neuquén can be observed in this orthorectified image. The thumbnail image focuses on the Ezequiel Ramos Mejía Reservoir.

However, in the full image the Los Barreales Reservoir can be seen to the North and the Piedra del Aguila Reservoir to the South. All of the reservoirs are created by dams along the Limay River.

Argentina – February 1st, 2011

This orthorectified image

Provinces of Argentine Patagonia

38.9S 68W

April 2nd, 2010 Category: Mountains, Rivers

Argentina - February 23rd, 2010

Argentina - February 23rd, 2010

This image of Argentina includes the provinces of Neuquén (upper left), Río Negro (upper right) and Chubut (lower half). Neuquén is located at the northern end of Patagonia. The province’s southeastern limits are set by the Limay River, facing the Río Negro Province.

There are two main distinctive landscapes; the mountainous fertile valleys with forest on the West, and the arid plateau with fertile land only near the basins of the rivers on the East, mainly the Limay River and Neuquén River.

Río Negro is also located at the northern edge of Patagonia. The main water source at the arid plains that cover most of the province is the Río Negro River, in whose valley most of the settlements and farms are located. The over 600 km of the Rio Negro’s valley are divided in Alto Valle (West), Valle Medio (center) and Valle Inferior (East).

Finally, Chubut is situated in the southern part of Argentina between the 42nd parallel south (forming the border with the Río Negro Province) and the 46th parallel south. The Andes range, partially visible in the lower left corner, separates the province from Chile.

Artificial Reservoirs in Neuquén Province, Argentina

39.2S 68.7W

March 16th, 2010 Category: Lakes, Rivers

Argentina - February 25th, 2010

Argentina - February 25th, 2010

Several artificial reservoirs created by dams on the Limay River lie across this image of Argentina’s Neuquén Province: (from lower left to upper right) the Piedra del Águila Reservoir, the Ezequiel Ramos Mejía Reservoir and the Los Barreales Reservoir.

The Piedra del Águila Dam, is the second of five dams on the Limay River in northwestern Argentine Patagonia (the Comahue region). It is situated at 590 m above mean sea level, downstream from the confluence of the Limay and the Collón Curá River.

The dam, inaugurated in 1993, is used for the generation of hydroelectricity and the regulation of the flow of the river. Its reservoir has an area of 305 km², a mean depth of 41.3 m (maximum 120 m), and a volume of 1.26×1010 m³.

Moving to the northeast, the El Chocón Dam is the fourth of five dams on the Limay River, at 381 m above mean sea level. While the formal name of the project is Embalse Ezequiel Ramos Mexía, in common use it ended up acquiring the name of the settlement that served as the construction’s base of operations, Villa El Chocón.

El Chocón is part of a larger engineering scheme that also includes the Cerros Colorados Complex, on the Neuquén River. Los Barreales Reservoir is part of that complex, situated in a natural depression in Patagonia that was converted into a lake upon receiving the diverted waters of the Neuquén River.

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