Casale sul Sile in the context of Roncade

The Sile (Venetian: Sil) is a 95 km river in the Veneto region in north-eastern Italy. Its springs are in the municipality of Vedelago in the Province of Treviso. It flows into the northern part of the Lagoon of Venice at the mouth of the River Piave Vecchia. It receives the waters of its tributary, the Botteniga, at Treviso.

Some of the rivers in the plain of the Veneto come from springs in the nearby Alps, while others have groundwater springs in the plain. The Sile originates in the plain and therefore it is a short river. Its springs are in the area of Albaredo, Casacorba and Cavasagra in the municipality of Vedelago. The fontanasso dea Coa Longa is considered to be the main spring. Two initial branches join at Morgano. The river has an initial west-east windy course which passes through or by Santa Cristina, Quinto di Treviso, Canizzano and Treviso. In Treviso it turns in a northwest-southeast direction towards the lagoon and passes by Silea, Casier, Cendon, Lughignano, Sant'Elena, Casale sul Sile, Quarto d'Altino, Trepalade and Portegrandi.

Silea is a comune (municipality) in the Province of Treviso in the Italian region Veneto, located about 25 kilometres (16 mi) north of Venice and about 4 kilometres (2 mi) east of Treviso. As of 31 December 2004, it had a population of 9,767 and an area of 18.7 square kilometres (7.2 sq mi).

Silea borders the following municipalities: Carbonera, Casale sul Sile, Casier, Roncade, San Biagio di Callalta, Treviso.