is a mainly hydroelectric reservoir built in 1966 on the Prado River,
a tributary of the Magdalena River (Colombia’s main river) (Fig. 1),
and it is located on the western slope of the Cordillera Central (or Central Range) of the Colombian Andes, at 370 m a.s.l. (Salazar et al. 2002).
This eutrophic water body is 39 km in surface area and has a maximum depth of 90 m. Morphometric and other basic char- acteristic are shown in Table 1.