Índices de qualidade da água e de estado trófico do rio Caiabi, MT

Andrietti, Grasiane; Freire, Rosane; Amaral, Adriana Garcia do; Almeida, Frederico Terra de; Bongiovani, Milene Carvalho; Schneider, Roselene Maria

doi:10.4136/ambi-agua.1769

Cited by 25 publications

(19 citation statements)

References 24 publications

(21 reference statements)

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“…For the most urbanized points, P3, P5 and P6, the WQI values were better in the rainy season, due to the effect of soil sealing and dilution of pollutants. Andrietti et al (2016) studying the waters of the Caiabi River (MT, Brazil) described that the presence of riparian forest and vegetation cover aid in the improvement of the WQI and do not present great variation with the seasonality. The main sources of phosphorus to the aquatic environment are rocks, domestic sewage and nonpoint agricultural sources (Pompêo and Moschini-Carlos, 2003).…”

Section: Resultsmentioning

confidence: 99%

Land use and its impacts on the water quality of the Cachoeirinha Invernada Watershed, Guarulhos (SP)

Oliveira¹,

Vargas²,

Saad³

et al. 2018

Rev. ambiente água

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The urbanization process through which large urban centers have been passing has drastically affected the availability and especially the quality of water. The Cachoeirinha Invernada Watershed (CIW), located in the municipality of Guarulhos (State of São Paulo, Brazil), includes areas with different land use classes. This paper aims to correlate the spatial and temporal effects of land use and land cover on the water quality of the Cachoeirinha Invernada Watershed. In a period of 12 months and at six sampling points along the watershed, the physicochemical parameters temperature (T), pH, turbidity (TU), total solids (TS), electrical conductivity (EC), total phosphorus (TP), biochemical oxygen demand (BOD), as well as microbiological analysis (E. coli) were measured. Water quality was assessed using a modified version (WQIM) of the Water Quality Index (WQI) and the Trophic State Index (TSI). The areas surrounded by urban development presented a marked worsening in water quality, with the downstream point most affected and ranked as 'POOR'. From the evaluated parameters, what contributed most to water quality degradation of the Cachoeirinha Invernada Watershed (CIW) was E. coli, followed by BOD, and TP, all parameters related to the presence of sewage in the water. The need for the construction of sewerage and waste treatment, protection and recovery of riparian forests, and environmental education regarding waste disposal are necessary to significantly improve the environmental quality of the Cachoeirinha Invernada Watershed. correlacionar os efeitos espaciais e temporais do uso da terra e da cobertura do solo na qualidade da água dessa bacia hidrográfica.. Foram analisados, em um período de 12 meses e em seis pontos de amostragem na área da bacia hidrográfica, parâmetros físico-químicos como a temperatura (T), pH, turbidez (TU), sólidos totais (ST), condutividade elétrica (CE), fósforo total (FT), demanda bioquímica de oxigênio (DBO), bem como análise microbiológica (E. coli). A qualidade da água foi avaliada usando uma versão modificada (WQIM) do Índice de Qualidade da Água (IQA) e do Índice do Estado Trófico (IET). As áreas cercadas pelo desenvolvimento urbano apresentaram um acentuado agravamento na qualidade da água, com o ponto a jusante mais afetado e classificado como 'POBRE'. A partir dos parâmetros avaliados, o que mais contribuiu para a degradação da qualidade da água da BHCI foi E. coli, seguido de DBO e FT, parâmetros esses relacionados à presença de esgoto na água. A necessidade de construção de esgoto e tratamento de resíduos, proteção e recuperação de matas ciliares e educação ambiental com foco na eliminação de resíduos são necessárias para melhorar significativamente a qualidade ambiental da bacia hidrográfica Cachoeirinha Invernada.Palavras-chave: degradação ambiental, eutrofização, águas urbanas, poluição da água.

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Section: Resultsmentioning

confidence: 99%

Land use and its impacts on the water quality of the Cachoeirinha Invernada Watershed, Guarulhos (SP)

Oliveira¹,

Vargas²,

Saad³

et al. 2018

Rev. ambiente água

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“…It constitues a public health problem that some parasites may be transmitted by water and also by contaminated soil, since they can contaminate the water sources and peridomestic soil and due to the peculiarity of the biological cycle of its etiological agents. Also, the proximity between human and animal makes disease agents relatively important from the epidemiological point of view (Rey, 2008;Sotero-Martins et al, 2014;Amaral et al, 2016).…”

Section: Resultsmentioning

confidence: 99%

Untitled

2018

Rev. ambiente água

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The state of Bahia's main climatic characteristic is the high spatial and chronological variability of precipitation. This heterogeneity may be used to determine of pluviometrically homogeneous areas that can define mesoregions in the state, since they allow better management of water resources and help in the elaboration of agricultural studies. The mesoregions already proposed by the scientific community for the state were based only on the annual precipitation in the proximity of the pluviometric stations. In this paper, besides these parameters, spatial and chronological rainfall distribution was considered, i.e., the Precipitation Concentration Degree (PCD) and Precipitation Concentration Period (PCP). The new zoning is based on an update of a study defined in 2000 that divided Bahia into eight mesoregions. Thus, 180 pluviometric stations were distributed throughout the state and grouped conforming to the division previously described. It was concluded that some stations of the same mesoregion had presented conflicting values for the analyzed parameters and, therefore, should not belong to the same area. Starting from an arrangement of the collection stations, considering their proximity, annual precipitation and statistical parameters, a new zoning for Bahia with 10 clusters was defined and validated through the statistical treatment of data.

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“…An excess of N and P in water triggers the widely investigated eutrophication phenomenon (Smith and Schindler, 2009;Bachmann et al, 2013;Fontana et al, 2014;Smith et al, 2014;Andrietti et al, 2016;Grilo et al, 2016;Wiegand et al, 2016).…”

Section: Nitrate (No 3 -mentioning

confidence: 99%

Impacts of Pig Slurry Applied to Two Different Soils on Nutrient Transport by Runoff

Kaufmann

Bertol

Santos

et al. 2019

Rev. Bras. Ciênc. Solo

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Runoff in agricultural areas with intensive application of pig slurry can transport significant amounts of nutrients. This study evaluates the effects of different pig slurry (PS) application rates (0, 50, 100, and 200 m 3 ha-1) on nutrient loss through runoff during soybean cultivation under no-tillage. It was conducted at two sites in southern Brazil, one on an Alfisol (27° 43' south and 50° 3' west) and one on an Inceptisol (27° 47' south and 50° 18' west). The PS was applied to the soil once at the beginning of the soybean cycle. Each plot was 11 m long in the direction of the slope and 3.5 m wide. To induce runoff, artificial rainfall was applied in four different tests (T1, T2, T3, T4), with an intensity of 65 mm h-1 for 90 minutes. The first test was performed one day after PS application, while the other tests were performed throughout the soybean cycle. During each test, runoff samples were collected at 10-min intervals after the beginning of runoff. The runoff amount and the NO 3-, NH 4 + , P, and K + concentrations in the runoff were measured. In T1, nutrient transport from the Alfisol and the Inceptisol increased with increasing PS doses. In some cases, this effect was still noticeable in T2 and T3, but not in the last test (T4). The transported amounts of NO 3-, NH 4 + , P, and K + decreased as the period between PS application and simulated rainfall increased. Regardless of the soil and the treatment, NO 3 was transported in the greatest quantities, followed by K + , NH 4 + , and P.

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Índices de qualidade da água e de estado trófico do rio Caiabi, MT

Cited by 25 publications

References 24 publications

Land use and its impacts on the water quality of the Cachoeirinha Invernada Watershed, Guarulhos (SP)

Land use and its impacts on the water quality of the Cachoeirinha Invernada Watershed, Guarulhos (SP)

Untitled

Impacts of Pig Slurry Applied to Two Different Soils on Nutrient Transport by Runoff

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