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Article
Affiliation(s)

1. Post-Graduate Program in Water Resources, Federal University of Sergipe, São CristóvãoSE 49100-000, Brazil
2. Chemical Engineering Department, Federal University of Sergipe, São CristóvãoSE 49100-000, Brazil
3.Campus Aracaju, Federal Instituteof Sergipe, AracajuSE 49055-260, Brazil
4. Embrapa Coastal Tablelands, Brazilian Agricultural Research Corporation, AracajuSE 49025-04, Brazil
5. Institute of Chemistry, Federal University of Bahia, SalvadorBa 40170-115, Brazil

ABSTRACT

Population growth has consequences for intense use of aquatic ecosystems. Samples were taken, between 2013 and 2014, in the reservoirs “Algodoeiro” and “Gloria” in Sergipe, Brazil. TSI (Trophic State Index) and WQI (Water Quality Index) were used. It was determined the parameters such as conductivity, dissolved oxygen, total nitrogen, total phosphorus and chlorophyll. TSI has been applied, in “Algodoeiro”, which was classified as mesotrophic. With the increase of rainfall in 2014, this reservoir changed its condition to eutrophic. “Gloria” reservoir was already classified in super-eutrophication. Regarding the WQI, the reservoirs were classified in Class IV, indicating a critically degraded condition.

KEYWORDS

Water quality, environmental degradation, limnological studies, TSI (Trophic State Index), RWQI (Reservoir Water Quality Index).

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