2015
DOI: 10.1590/s2179-975x2214
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Abstract: AimDrought periods often occur in Brazilian semiarid region and are supposed to induce water quality degradation by changes in physical, chemical and biological properties of freshwater ecosystems. Reservoirs in this region are used as drinking-water supplies and are exposed to wide volume fluctuations during drought periods due to lack of precipitation and high evaporation rates. This study aimed to identify patterns on water quality of two reservoirs during a long drought period. It was expected that more ar… Show more

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Cited by 47 publications
(44 citation statements)
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“…The inorganic turbidity can be caused by resuspension of the sediment, through the action of the winds, since the reservoir presented low depths (<2.5 m) during the period of the study. A lower availability of light in the water column may lead to inhibition of phytoplankton growth as reported in other studies in the Brazilian semiarid region (Medeiros et al, 2015;Braga et al, 2015). As a result, the Cruzeta reservoir had lower values of chlorophyll, despite the high SRP concentration, compared to the Gargalheiras reservoir.…”
Section: Discussionmentioning
confidence: 60%
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“…The inorganic turbidity can be caused by resuspension of the sediment, through the action of the winds, since the reservoir presented low depths (<2.5 m) during the period of the study. A lower availability of light in the water column may lead to inhibition of phytoplankton growth as reported in other studies in the Brazilian semiarid region (Medeiros et al, 2015;Braga et al, 2015). As a result, the Cruzeta reservoir had lower values of chlorophyll, despite the high SRP concentration, compared to the Gargalheiras reservoir.…”
Section: Discussionmentioning
confidence: 60%
“…The Cruzeta reservoir had a unique behaviour for semiarid reservoirs as predominance of inorganic solids in this reservoir provided a high turbidity (Braga et al, 2015;Medeiros et al, 2015). In Cruzeta, Chl-a decreased while water volume reduced; this behaviour is contrary to many semiarid reservoirs.…”
Section: Discussionmentioning
confidence: 96%
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“…Limnological dynamics in the semiarid reservoirs are strongly influenced by seasonality and also by the prevailing hydro-climatic conditions [34,56]. Generally, it is expected that rainfall stimulates fluctuations in trophic conditions of water bodies due to an increase of sediment input from the drainage areas.…”
Section: Limnological Dynamics and Trophic Conditionsmentioning
confidence: 99%