According to information available on the website of the Executive Agency for Water Management of Paraíba (AESA is the Portuguese acronym), called the State Water Resources Management System (SIEGRH is the Portuguese acronym), the Araçagi and Tauá lakes have the following water permits and 
(Table 1).
Table 1
Input data
| Data | Value | Unit/format | Period | Source |
|---|---|---|---|---|
| Urban population (p) | 52,061 | Inhab (inhabitants) | 2019 | Municipality of Guarabira (aguaesaneamento.org.br) |
The portion of water demand that returns to the river ( ) | 0.8 | dimensionless | 2019 | Manual of consumptive uses of water in Brazil (snirh.gov.br) |
| Water demand (q) | 104.59 | liters/day/inhab | 2019 | Diagnosis of water and sewage services in the municipality of Guarabira (snis.gov.br) |
The amount of treated sewage ( ) | 0.8 | dimensionless | – | Tucci (2017) |
The effluent that is collected and treated ( ) | 0.55 | dimensionless | 2019 | Diagnosis of water and sewage services in the municipality of Guarabira (snis.gov.br) |
Target river class concentration for BOD ( ) | 5 | mg/l (milligrams/liter) | 2005 | CONAMA (2005) |
The concentration of the river before receiving the effluent ( ) | 2 | mg/l | 2017 | Tucci (2017) |
Parameter concentration in raw sewage ( ) | 569.04 | mg/l | 2015 | Sewage scheme for the municipality of Guarabira (atlasesgotos.ana.gov.br) |
 (Araçagi lake) | 6,443.64 | m3/h (cubic meters/hour) | 2018 | Update of the Paraíba State Water Resources Plan (aesa.pb.gov.br) |
 (Tauá lake) | 326.02 | m3/h | 2018 | Update of the Paraíba State Water Resources Plan (aesa.pb.gov.br |
| Total water permits (Araçagi lake) | 1,027.48 | m3/h | Current | (aesa.pb.gov.br) |
| Total water permits (Tauá lake) | 130.57 | m3/h | Current | (aesa.pb.gov.br) |
| The volume of the Araçagi lake | 63.3 | hm3 (hectomer) | – | (aesa.pb.gov.br) |
| The volume of the Tauá lake | 8.6 | hm3 | – | (aesa.pb.gov.br) |
| Urban Water Security Index (UWSI) | – | Shapefile | 2015 | Urban Water Security Index (metadados.snirh.gov.br) |
| Drought severity and duration condition | – | GeoTIFF | 2014–2019 | Drought monitor (monitordesecas.ana.gov.br) |
| Data | Value | Unit/format | Period | Source |
|---|---|---|---|---|
| Urban population (p) | 52,061 | Inhab (inhabitants) | 2019 | Municipality of Guarabira (aguaesaneamento.org.br) |
| The portion of water demand that returns to the river () | 0.8 | dimensionless | 2019 | Manual of consumptive uses of water in Brazil (snirh.gov.br) |
| Water demand (q) | 104.59 | liters/day/inhab | 2019 | Diagnosis of water and sewage services in the municipality of Guarabira (snis.gov.br) |
| The amount of treated sewage () | 0.8 | dimensionless | – | Tucci (2017) |
| The effluent that is collected and treated () | 0.55 | dimensionless | 2019 | Diagnosis of water and sewage services in the municipality of Guarabira (snis.gov.br) |
| Target river class concentration for BOD () | 5 | mg/l (milligrams/liter) | 2005 | CONAMA (2005) |
| The concentration of the river before receiving the effluent () | 2 | mg/l | 2017 | Tucci (2017) |
| Parameter concentration in raw sewage () | 569.04 | mg/l | 2015 | Sewage scheme for the municipality of Guarabira (atlasesgotos.ana.gov.br) |
| (Araçagi lake) | 6,443.64 | m3/h (cubic meters/hour) | 2018 | Update of the Paraíba State Water Resources Plan (aesa.pb.gov.br) |
| (Tauá lake) | 326.02 | m3/h | 2018 | Update of the Paraíba State Water Resources Plan (aesa.pb.gov.br |
| Total water permits (Araçagi lake) | 1,027.48 | m3/h | Current | (aesa.pb.gov.br) |
| Total water permits (Tauá lake) | 130.57 | m3/h | Current | (aesa.pb.gov.br) |
| The volume of the Araçagi lake | 63.3 | hm3 (hectomer) | – | (aesa.pb.gov.br) |
| The volume of the Tauá lake | 8.6 | hm3 | – | (aesa.pb.gov.br) |
| Urban Water Security Index (UWSI) | – | Shapefile | 2015 | Urban Water Security Index (metadados.snirh.gov.br) |
| Drought severity and duration condition | – | GeoTIFF | 2014–2019 | Drought monitor (monitordesecas.ana.gov.br) |