The Sensée is a river in northern France that crosses the département of Pas-de-Calais. The source is found at Croisilles and passes through Lécluse. It crosses the Canal du Nord at Arleux, and joins the canalized Escaut at Bouchain. The average descent is 2.42%. It is 47 km long: 27 km upstream of the Canal du Nord, and 20 km downstream of the Canal du Nord. The Sensée has many tributaries: the Cojeul, the Trinquise, the Hirondelle, the Agache and the Naville Tortue. A 10th-century document refers to the river by the name of Sensada. The origins of the name are unknown.