The soft relief and plain of the district it is consequence of the contributions of materials for the torrential waters, coming from the neighboring mountains, deposited in barrier form. This, added to the little rain and the dry climate, makes that the water doesn't have you been able to make headway toward the course of the main river that is Segre. The result is the formation of closed areas where the water you tight. Formerly there were many lagoons, as that of Ivars and Vila-sana, as well as other smaller rafts, and they took place filtrations of underground waters that gave place to wells, one of those base for the population's establishment. The scarce extension and bottom of the lagoon made that in summer it was totally dry, being formed deposits of salts that were exploited commercially from medieval time.

The 1862 arrived the water of the channel of Urgell to the the district of Pla d'Urgell, coming from the river Segre, of way that the lagoon was receptora of the one breaks up of the watering of the areas surrounding, fact that provoked an important increase of the surface and the volume of the water. The lagoon transforms into the pond of fresh water more big of Catalonia. A transformation that it behaved the appearance of a flora and a fauna in those surroundings, and, for effect it dominated, the place transformed into a I center of the social and economic life of the near towns. It was a suitable place for celebrations (eat and parties), or walks (in boat or walking). The hunt of ducks was very abundant, but also you it practiced the fishing of the river crangrejo, the eel or the catfish.

The lagoon was dried between 1949 and 1951, as consequence of the historical joint of the moment, since there were facilities to eliminate humid areas, to be become cultivation fields. But in 1995, the Department of Half Set of Generalitat of Catalonia it approved the special Plan of protection of the natural means and of the landscape of the pond. In 2002 you it constitutes the Consortium of the lagoon of Ivars and Vila-sana, the one which it bought the 165 hectares that, together with the Foundation Territory and Landscape of Caixa of Catalunya, they have made possible the tasks of recovery. Finally, in 2006 it will be one reality.

The superficial extension of the lake it is of 126 hectares, with a maximum depth 3'5 meters (although the stocking doesn't overcome 2 m), and a perimeter of 5.798 meters. The it dilutes it comes from the channel of Urgell and it breaks up for the end west, toward a flowing of the river Corb. The lacustrine area, with artificial islands, hurdle perimetral, the rushes, the riverside forest, among other vegetation, they guarantee the fauna presence. The place is ideal for the hibernation, the feeding, the reproduction and the one rest in the migratory routes of many species of birds. The project rationalizes the recreational and tourist use of this place, allowing the observation and the enjoyment of the nature, with respect to the agriculture and cattle raising implanted in the area. It is foreseen the installation of equipment like miradors, observatories of birds, gangplanks, itineraries naturalísticos, among other.