| Abbreviation | Definition |
| AEMET | Spanish Agency of Meteorology |
| AHP | Analytical Hierarchy Process |
| CNIG | National Center of Geographical Information |
| CW | Constructed Wetland |
| DEM | Digital Elevation Model |
| GIS | Geographical Information Systems |
| GSA | Global Sensitivity Analysis |
| IGN | National Geographic Institute |
| INE | National Statistics Institute |
| MCE | Multi-Criteria Evaluation |
| MITECO | Ministry of Ecological Transition |
| MET | Microbial Electrochemical Technologies |
| OAT | One-At-a-Time approach |
| REDIAM | Environmental Information Network of Andalucía |
| SA | Sensibility Analysis |
| SIOSE | Spanish Land Cover Information System |
| WW | Wastewater |
| WWTs | Wastewater Treatments |