river of Karnataka (Karnātaka) and Andhra Pradesh states, southern India. The Penneru rises on the Deccan plateau (Deccan) 7 miles (11 km) west-southwest of Chik Ballapur in eastern Karnataka. It flows north into Andhra Pradesh state and turns east-southeast toward the Coromandel Coast, emptying into the Bay of Bengal (Bengal, Bay of) near Nellore, about 350 miles (560 km) from its source. The river is seasonal, becoming a torrent after the rains and a thin stream during dry periods.