The Omodeo Lake is an artificial lake of Sardinia. It is located in the province of Oristano, in the subregion Barigadu. It is formed by the damming of the river Tirso through a dam located in the municipality of Busachi. The reservoir is named after Angelo Omodeo, the engineer who oversaw the design of the first dam, located near Ulà Tirso and which now is partially submerged by the waters of the new reservoir. The territory of Lake Omodeo is placed on the list of sites of Community importance due to its great importance from the point of view of landscape and environmental.