Analysis of total phosphorus and chlorophyll a correlations in Ceará reservoirs, Brazil

Reservoirs worldwide are prone to water quality degradation caused by increased primary production. Therefore, it is essential comprehend the factors that influence this phenomenon as plays a fundamental role in controlling eutrophication. The aim of study was analyze correlation between total phosphorus (TP) and chlorophyll (Chla) 155 reservoirs located state Ceará, Brazil. This analysis conducted through comprehensive examination historical data (2008–2021) obtained from resource management company state, which monitors these parameters. TP Chla examined simple adjustments, utilizing coefficient determination (R²) an evaluation metric. Afterward, investigated potential influences on dynamics adjustments based such hydrographic basin, reservoir size, trophic (as for concentrations), volumetric variability coefficient. In general, yielded unsatisfactory models (R² < 0.4) majority (n = 115). Despite their inadequacy, align with classic literature models, indicating most basins, higher availability column contributes concentration. influencing pattern dispersion revealed performance R² associated various factors, different watersheds, variability, concentrations. variance varying sizes states concentration considered insignificant.