Assessment of phosphorus loading dynamics in a tropical reservoir with high seasonal water level changes

Autor: Iran E, Lima Neto, Pedro H A, Medeiros, Alexandre C, Costa, Mario C, Wiegand, Antônio Ricardo M, Barros, Mário U G, Barros
Rok vydání: 2022
Předmět:
Zdroj: Science of The Total Environment. 815:152875
ISSN: 0048-9697
Popis: Nutrient accumulation in man-made reservoirs has been documented worldwide. Therefore, quantifying phosphorus loading and understanding its temporal dynamics in reservoirs is mandatory for sustainable water management. In this study, the Vollenweider's complete-mix phosphorus budget model was adapted to account for high water level variations, which are a common feature in tropical reservoirs, and for internal phosphorus loads. First- and zero-order kinetics were adopted to simulate phosphorus settling and release from the sediment layer, respectively, considering variable area of phosphorus release according to the height of the anoxic layer. The modeling approach was applied for a 52-months period to a 31-years-old reservoir located in the semiarid region of Brazil with 7.7 hm
Databáze: OpenAIRE