It is a left side tributary of the Cervo which flows through the provinces of Biella and Vercelli .
The Marchiazza is a 34 km long stream ( torrente ) of Piedmont , in north - western Italy .
Marchiazza is a left side tributary of the Cervo which flows through the provinces of Biella and Vercelli .
The Marchiazza is a 34 km long stream ( torrente ) of Piedmont , in north - western Italy .