Water Quality, Organic Loading and Nutrient Loading in the Mouth of Cascata Brook: The Subbasin contribution to Barra Bonita Reservoir (Tietê River - São Paulo (Brazil)

Belluta, Ivalde; Jesus, Sílvio Alexandre de; Vieira, Márcio Piedade; Corrêa, Nelita Maria; Rall, Vera Lúcia Mores; Valente, José Pedro Serra

doi:10.5935/1984-2295.20160021

Cited by 2 publications

(5 citation statements)

References 4 publications

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“…Previous studies in the Cascata stream showed good water quality indicators, in terms of dissolved oxygen, biochemical demand of oxygen, electric conductivity and water quality index (Belluta et al, 2016). Therefore, the results we found recently indicating poor water quality (high concentrations of nitrogen, phosphorus and thermotolerant coliforms) were not expected.…”

Section: Discussioncontrasting

confidence: 53%

“…For the considered geological region, the Cuesta geological formation of Botucatu, the study is unique, as it focused on impacts generated by stream damming. Other regional studies searched to evaluated anthropic effects related to water quality deterioration (sewage contamination, traffic road contamination and siltation), suppression of riparian forests and intensification of land use by agriculture practices (Uieda and Barretto, 1999;Moretto and Nogueira, 2003;Gralhoz and Nogueira, 2006;Oliveira et al, 2014;Belluta et al, 2016Belluta et al, , 2020Manoel and Uieda, 2018.…”

Section: Discussionmentioning

confidence: 99%

“…The longitudinal variations were of smaller amplitude in November (late spring), probably because this is the beginning of the rainy season (see Belluta et al, 2016 for Cascata basin rain/flow data), with the consequent increase of the stream flow that promotes a relative homogenization of the system.…”

Section: Discussionmentioning

confidence: 99%

“…The studied environment (Figure 1) is a typical small stream (4.23 km long; 5.55 km 2 of drainage area; 81.5 L s -1 of mean flow) (Belluta et al, 2016) of the Cuesta geologic formation. The stream, named Cascata, drains small rural properties and suburban areas of Botucatu city, in the center of São Paulo State, Brazil.…”

Section: Study Area and Sampling Periodsmentioning

confidence: 99%

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Impacts of an urban flood control infrastructure on the limnology and ichthyofauna of a basaltic Cuesta stream (southeast Brazil)

Siva,

Kimura,

Brambilla

et al. 2023

Braz. J. Biol.

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Strategies for flood control associated to extreme precipitation events in urban areas are urgent, in order to prevent not only material damages but also to avoid human losses. The construction of flood contention reservoirs (“piscinões”) has become a common engineering intervention in urban and peri-urban areas. However, there is a lack of studies focused on the evaluation of environmental impacts of this type of construction. This study intended to verify the ecological effects of a retention reservoir built directly on the course of the Cascata stream, Botucatu (SP). Three sampling sites were selected, located upstream the reservoir, in the reservoir and downstream. Samplings were carried out in July (winter - dry) and November (late spring - rainy) 2020. In situ measurements were obtained through a multiparameter probe (temperature, pH, electrical conductivity, dissolved oxygen, total dissolved solids, and oxidation-reduction potential) and water samples were collected for laboratory determinations (nitrogen, total phosphorus, thermotolerant coliforms, and chlorophyll-a). For fish sampling, manual trawls, sieves and hand nets were used, with a sampling effort of 10 throws per artefact and site. Despite the small distance between the sampling points (~1,300 m) considerable changes in the limnological conditions and fish community structure were observed. The studied environment is originally a small river surrounded by riparian forest, but this characteristic was abruptly changed in the reservoir stretch, with the direct exposition of a much larger water surface to intense solar radiation and atmosphere exchanges. Consequently, as evidenced by the PCA analysis, there was a considerable (stream-reservoir increase) of temperature, dissolved oxygen and chlorophyll. However, this spatial trend was partially disturbed by an accidental sewage-pipe rupture (posteriorly fixed) adjacent to the first sampling point, due to a previous event of extreme precipitation, which resulted in increased values of nutrients, chlorophyll, conductivity and thermotolerant coliforms. Eleven fish species were collected (two non-native), belonging to seven families and five orders. The upstream reference point (despite not be pristine), was characterized by the predominance of native species, while the reservoir condition favored the development of large populations of the non-native species. Despite the urgency of effective actions to prevent floods in urban areas, construction of contention reservoirs directly on stream courses should be avoided, due to their negative ecological impacts.

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Section: Discussioncontrasting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Study Area and Sampling Periodsmentioning

confidence: 99%

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Impacts of an urban flood control infrastructure on the limnology and ichthyofauna of a basaltic Cuesta stream (southeast Brazil)

Siva,

Kimura,

Brambilla

et al. 2023

Braz. J. Biol.

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“…This, coupled with the absence of riparian vegetation, contributes to the leaching of metals derived from pesticides and fertilizers used on crops. In addition, the Barra Bonita reservoir is located downstream of the highly industrialized and urbanized Piracicaba river basin, which contributes to the enrichment of the reservoir with metals (Rodgher et al 2005;Smith and Espindola 2014) as well as nutrients (Belluta et al 2016). The Barra Bonita reservoir showed levels increasing in the upstream-downstream direction for Cu, Ni, Mn, and Fe, while concentrations decreasing in the upstream-downstream direction were observed for Cr, Zn, and Pb.…”

Section: Metalsmentioning

confidence: 99%

Spatial distribution, bioavailability, and toxicity of metals in surface sediments of tropical reservoirs, Brazil

Frascareli

Cardoso-Silva

Mizael

et al. 2018

Environ Monit Assess

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Depending on the environmental conditions, surface sediments can retain all the contaminants present and provide a record of the anthropic activities affecting the aquatic environment. In order to analyze the impacts on reservoirs, surface sediments were collected in three characteristic regions (riverine, transitional, and limnetic zones) of seven reservoirs in São Paulo State, Brazil. Analyses were made of grain size, organic matter (OM), total phosphorus (TP), and total nitrogen (TN). Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) was used to determine pseudo-total and bioavailable metals (Cu, Cd, Cr, Ni, Pb, Zn, Mn, Fe, and Al). A Horiba probe was used to measure dissolved oxygen (DO), pH, redox potential (ORP), and temperature (Temp) in the bottom water. The data were analyzed using multivariate statistics. Enrichment factors (EF), pollution load index values (PLI), and background values (BG) were also determined in order to evaluate the potential toxicity. Intra-reservoir and inter-reservoir spatial heterogeneity (p < 0.05) were observed using two-way analysis of similarities. Principal component analysis indicated greater influence of metals in the Barra Bonita, Salto Grande, and Rio Grande reservoirs, corroborating the PLI, EF, and BG data. Bioavailable Cu was found in the Rio Grande reservoir, possibly associated with copper sulfate used to control algal blooms, while bioavailable Ni in the Barra Bonita reservoir was attributed to the presence of industrial wastes and natural geology. The bottom water conditions indicated that the metals remained in insoluble forms.

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Water Quality, Organic Loading and Nutrient Loading in the Mouth of Cascata Brook: The Subbasin contribution to Barra Bonita Reservoir (Tietê River - São Paulo (Brazil)

Cited by 2 publications

References 4 publications

Impacts of an urban flood control infrastructure on the limnology and ichthyofauna of a basaltic Cuesta stream (southeast Brazil)

Impacts of an urban flood control infrastructure on the limnology and ichthyofauna of a basaltic Cuesta stream (southeast Brazil)

Spatial distribution, bioavailability, and toxicity of metals in surface sediments of tropical reservoirs, Brazil

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