Açude Cachoeira is a reservoir located in the municipality of Aurora, in the state of Ceará, Brazil. The reservoir impounds the Riacho Caiçara and sits within the semi-arid landscape characteristic of interior Ceará. As a typical northeastern Brazilian açude (reservoir), it serves as an important local water resource and supports a productive fishery in an otherwise water-scarce region. The surrounding environment reflects the Caatinga biome, with its distinctive dry-adapted vegetation and seasonal rainfall patterns that directly influence water levels and fish behavior throughout the year.