Editing Tagus (section)

== Hydrology ==

The hydrological regime of the Tagus is determined by the rain and snow variations typical of the central region of the Iberian Peninsula, especially in reference to the mountain formations integrated here. The river's major floods usually occur from January to April, with an absolute maximum in March (when thawing occurs), while the lowest flows occur between July and October, with a minimum in September.

This results in a very irregular course, with strong flow oscillations. As it passes through Alcántara (Cáceres), these range from {{Convert|350|m3/s|abbr=on}} in February and March to {{Convert|11|m3/s|abbr=on}} in August and September.

This regime has been altered in the second half of the 20th century as a result of the construction of different engineering works, aimed at regulating its basin for five main uses: drinking water supply, irrigation, water diversion to an external basin (that of the Segura River), electricity production, and cooling of nuclear power plants.