Açude Riacho do Sangue, also commonly known as Boqueirão, is a reservoir located in the municipality of Solonópole in the state of Ceará, Brazil, at approximately 5°42'S, 38°58'W. It was built on the bed of the Riacho do Sangue and is part of the Médio Jaguaribe basin. The reservoir is managed by DNOCS (the federal agency responsible for water infrastructure in the Brazilian Northeast).

The dam structure is 308 meters long, 86.5 meters wide at the base, and 6 meters wide at the crest, with a height of 21 meters. The reservoir has a total storage capacity of approximately 58.43 to 61.5 million cubic meters (hm³), and its drainage basin covers 1,368.58 km². The maximum water level elevation is 118 meters above sea level. These dimensions suggest a substantial body of water when at or near full capacity, which it reached in March 2023 for the first time in 12 years — an indication that water levels in this semi-arid region can fluctuate dramatically depending on rainfall patterns.

The reservoir sits in the Sertão (semi-arid interior) of Ceará, a region characterized by irregular and seasonal rainfall. Water levels can vary considerably from year to year, which is an important planning consideration for paddlers. The construction of the reservoir began in October 1915 and was completed in January 1918, making it a historically significant piece of water infrastructure in the region.

No paddling-specific access points, facilities, restrictions, or regulated routes are documented for this reservoir. Paddlers should contact DNOCS or the Secretaria dos Recursos Hídricos do Ceará (SRH-CE) before visiting to confirm current water levels and any applicable regulations governing recreational use of the reservoir.