Pisuerga

Since the 1950s the water level of the river has been very regular throughout the year due to the huge Aguilar de Campoo dam which collects all the water from the river's rainy upper valleys. This regulation has allowed the creation of vast extensions of irrigated farmland along the Pisuerga's course across the northern Castilian plain.

In Spanish culture

The Spanish phrase aprovechando que el Pisuerga pasa por Valladolid ("And now since Pisuerga crosses Valladolid") is a popular way to point out or acknowledge a non sequitur since the river has no bearing with the following "consequence".