The Rio Quixeramobim winds through the semi-arid interior of Ceará state in northeastern Brazil, flowing from its headwaters in the Serra das Matas near Monsenhor Tabosa and Banha southeastward through the municipalities of Boa Viagem, Quixeramobim, and Banabuiú before emptying into the Rio Banabuiú, one of its principal tributaries. Originally known to the indigenous peoples of the region as Rio Ibu, the river drains a basin that also encompasses parts of Madalena, Itatira, and Santa Quitéria. The river is characterized by the semi-arid climate typical of the Ceará sertão, where seasonal rainfall patterns heavily influence water levels and fishing conditions throughout the year. Two significant reservoirs — the Açude Quixeramobim, with a storage capacity of approximately 54 million cubic meters, and the Açude Fogareiro, with a larger capacity of roughly 118.8 million cubic meters — sit along the river near Monsenhor Tabosa and serve as the primary water supply for the three riverside municipalities. These impoundments create the most productive and accessible fishing environments along the river system.