Chamangá River  The Chamangá River is a river in Uruguay. It is situated in northern Flores Department. The river is a tributary of the arroyo Maciel, itself flowing into the Yí River. The Yí River is a tributary of the westward draining Río Negro. The Chamangá River rises in a range of hills known as the Cuchilla Grande, and it generally runs from south to north in the Flores Department. The settlement of Chamangá is situated nearby.