Impacts of Land Use on the Chemical Attributes of the Riparian Soil of a Tropical Semi-Arid Region

Oliveira, José Neuciano Pinheiro de; Cunha, Giulliana Karine Gabriel; Melo, Jessica Freire Goncalves Wanderley de; Nascimento, Clístenes Williams Araújo do; Silva, Airon José da; Cunha, Karina Patr cia Vieira da

doi:10.30638/eemj.2021.105

Cited by 5 publications

(1 citation statement)

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“…Also, the precipitations can carry the phosphorus present in the soil to the reservoir (Cunha et al, 2022), so the rainy season can contribute to the transport of phosphorus to the water body. This process is exacerbated in the semi-arid region due to factors such as the presence of shallow soils and sparse vegetation, facilitating erosion processes and promoting diffuse pollution (Oliveira et al, 2021). The positive correlation between TP and turbidity, total suspended solids (OSS), and SRP can be attributed to the association of phosphorus with sediment particles that enter the reservoir through precipitation, thereby increasing turbidity levels (Medeiros et al, 2015;Santos et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Trophic state in Brazilian semiarid reservoirs after reflooding

Monicelli,

Rocha Junior,

Lima

et al. 2023

RBRH

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Prolonged drought extreme events can intensify eutrophication symptoms. This study aimed to analyze the trophic state of two semiarid reservoirs (Cruzeta and Dourado) that experience regular periods of drying and reflooding, verifying limnological changes. Two distinct periods were defined: Period I - before water depletion and Period II – after water renewal. To assess the changes in the limnological variables and the trophic state following the reflooding was conducted Wilcoxon test, Pearson's Correlation, and cluster analysis. Despite similar hydro-meteorological conditions, the reservoirs exhibited different outcomes in limnological variables. Due to the prolonged drought, Cruzeta maintained the eutrophic state in both periods, with the reservoir retaining only 2% of its water volume. In the Dourado reservoir, the trophic state change was observed, shifting from mesotrophic to eutrophic. The acceleration of eutrophication may have occurred due to the existence of organic matter in the sediment, coming from plantations inside the reservoir in addition to phosphorus carried from the drainage basin and by internal loading. Thus, reflooding did not improve water quality conditions and may intensify eutrophication. Therefore, it is recommended that effective reservoir and drainage basin management practices be implemented to mitigate eutrophication and aim for improvements in water quality.

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Section: Discussionmentioning

confidence: 99%