Modeling the eutrophication process in Tucuruí, a tropical amazonian reservoir

Area of Science:

• Limnology
• Environmental Science
• Hydroelectric Reservoir Management

Background:

• The Tucuruí Hydroelectric Power Plant Reservoir (UHE - Tucuruí) is a critical tropical aquatic system.
• Assessing eutrophication in tropical reservoirs requires specialized indices due to unique environmental factors.

Purpose of the Study:

• To develop and validate a new Trophic State Index (TSI) model for tropical reservoir environments.
• To compare the efficacy of the new TSI model against Lamparelli's existing model.
• To accurately assess the current eutrophication status of the UHE - Tucuruí reservoir.

Main Methods:

• Statistical analysis for model development and comparison.
• Incorporation of magnesium and total pigment parameters into the TSI model.
• Application of the new TSI model across various sampling stations and time periods.

Main Results:

• The developed TSI model demonstrated a more accurate reflection of the reservoir's trophic conditions compared to Lamparelli's model.
• The inclusion of magnesium and total pigments improved the index's sensitivity to tropical ecosystem specificities.
• New TSIs were calculated for each station, providing a nuanced understanding of eutrophication levels.

Conclusions:

• The novel TSI model is effective for assessing eutrophication in tropical hydroelectric reservoirs.
• The model's adaptability to specific ecosystem characteristics enhances its reliability.
• This research provides a valuable tool for the management and conservation of the UHE - Tucuruí reservoir and similar systems.