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The Tagus River is the longest river in the Iberian Peninsula, flowing across Spain and Portugal. Its course has shaped the region’s geography, economy, and history. The Alcántara Dam, situated on the river in central Spain, is a significant hydraulic structure that plays a vital role in water management and hydroelectric power generation.
The Tagus River: An Overview
The river originates in the mountains of eastern Spain and travels approximately 1,007 kilometers before reaching the Atlantic Ocean. It passes through major cities such as Madrid and Toledo, serving as a crucial water source for agriculture, industry, and urban areas. The river’s basin covers a vast area, supporting diverse ecosystems and communities.
The Alcántara Dam: Construction and Purpose
The Alcántara Dam was constructed between 1956 and 1969 and is one of Spain’s most important hydroelectric projects. It is built on the Tagus River near the town of Alcántara in Cáceres Province. The dam’s primary functions include flood control, water supply, and electricity generation.
Structural Features and Impact
The dam is a concrete arch structure that spans the narrow gorge of the Tagus River. It has a height of 131 meters and a length of 210 meters. The hydroelectric plant has an installed capacity of around 1,174 megawatts, providing power to a significant portion of Spain. The dam also helps regulate river flow, reducing the risk of floods downstream.
Significance as a Hydraulic Landmark
- Represents advanced engineering of its time
- Contributes to regional energy supply
- Supports water management and flood control
- Enhances ecological stability in the basin