Impactos de Ações Antrópicas em Bacias de Manancial Rurais de Montanha Sobre Parâmetros de Qualidade de Água

Castro, Cinthia; Mendonça, Antônio Sérgio Ferreira

doi:10.21168/rbrh.v9n1.p17-26

Cited by 4 publications

(7 citation statements)

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“…Segundo Barros (2004), com o emprego e o uso de fertilizantes e excrementos de animais, esse material pode ser carreado pelo escoamento superficial para os cursos d'água. Castro & Mendonça (2004), Crepalli (2007) e Silva (2007 também registraram maiores quantidades de nitrato devido às práticas agrícolas e à exposição do solo por cobertura de pouca proteção efetiva, além da aplicação de fertilizantes. Analisando os impactos das atividades humanas em bacias reflorestadas, Castro & Mendonça (2004) constataram uma melhoria na qualidade de água em relação à quantidade de nitrato e nitrito nas microbacias com cobertura vegetal densa e em fase de regeneração avançada.…”

Section: Parâmetros Qualitativos Da áGuaunclassified

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

Marmontel

Rodrigues

2015

Floresta Ambient.

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RESUMOO objetivo desta pesquisa foi avaliar e comparar a qualidade da água de quatro nascentes em diferentes coberturas de terra e conservação da vegetação no Córrego Pimenta. As coletas de água foram realizadas mensalmente durante um ano, avaliando dez parâmetros físico-químicos, sendo que os dados foram submetidos ao Teste de Tukey. A nascente um (N1) possui mata ciliar preservada; a nascente dois (N2) possui mata ciliar perturbada; a nascente três (N3) possui bambuzal e mata ciliar, e está degradada; a nascente quatro (N4) tem cobertura de pastagem e se encontra em degradação. As nascentes N1 e N2 tiveram os valores inferiores em temperatura, turbidez, cor, nitrato, nitrito e ferro, e valores próximos à neutralidade em pH. A N3 mostrou os valores inferiores para condutividade elétrica, TDS, salinidade e pH. As nascentes N1 e N2 indicaram que sete parâmetros foram melhores na qualidade da água, demonstrando que a mata ciliar auxilia em sua proteção qualitativa da água.Palavras-chave: nascente, mata ciliar, parâmetros físico-químicos, pastagem. Indicative Parameters for Water Quality in Water Springs with Different Land Cover and Conservation of Riparian Vegetation ABSTRACTThe objective of this study was to evaluate and compare the water quality of four water springs located in different land cover types and conservation of vegetation along the Pimenta stream. Water sampling was conducted monthly for one year. Ten physicochemical parameters were evaluated and data were submitted to the Tukey test. Water spring number one (N1) is located in an area of preserved riparian forest; water spring number two (N2) is located in an area of disturbed riparian forest; water spring number three (N3) is in an area of disturbed bamboo and riparian forest; and water spring number four (N4) is in a degrading area of pasture cover. N1 and N2 showed lower values for the parameters of temperature, turbidity, color, nitrate, nitrite and iron, and pH values close to neutral. N3 showed lower values for electrical conductivity, total dissolved solids (TDS), salinity and pH. The results found for N1 and N2 indicate that seven parameters were higher regarding water quality, which demonstrates that native vegetation can help protect water quality.

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Section: Parâmetros Qualitativos Da áGuaunclassified

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

Marmontel

Rodrigues

2015

Floresta Ambient.

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“…In addition, this is the closest point of entrance into the river, receiving significant contributions from the inflow areas. Two of the primary artificial sources of phosphorous are the domestic sewers and the agricultural fertilizers, as discussed by Shrestha and Kazama (2007), Castro and Mendonça (2004), Räike et al (2003) and Esteves (1998).…”

Section: Spatial-temporal Variationsmentioning

confidence: 99%

“…It is estimated that around 80% of the sewage collected in cities, towns and small villages are not treated and, usually, are dumped into the closest spring (MONAGHAN et al, 2009). In the rural areas, the pollution is from a variety of origins and largely due to the runoff from agricultural areas and the return flow of irrigation, associated with the sediments, nitrogen enriched fertilizers and phosphates as well as pesticides (CASTRO;MEMDONÇA, 2004). The overland flow in livestock areas is also associated with manure, which is rich in nutrients and coliform material (FIGUEIRÊDO et al, 2006;LOPES et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

The water quality investigation using GIS and multivariable analysis in a semiarid region reservoir

Mithya¹,

Alexandre

Andrade

et al. 2010

Rev. Ciênc. Agron.

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-This study was carried out in the Serrote reservoir, sited in the Groaíras watershed at the northeastern region of Ceará State, Brazil. The aim was to investigate the temporal and spatial variability of water quality. Data investigation was processed using multivariate analysis/cluster analysis and GIS techniques. Samples were taken in four stations spreading out over the water body during five campaigns of collection (February, May, August/2007 and May, August/2008). The water quality parameters analyzed were: Electric Conductivity (EC), pH, Dissolved Oxygen (DO), temperature, chlorophyll 'a' concentration and Total Phosphorus (TP). Two homogeneous groups were identified, which expressed the inter-annual seasonality influence in the water quality. The highest concentration of investigated attributes occurred in 2008. At that year, the depth of the annual rainfall was 53% above the annual average. Chlorophyll 'a' and total phosphorus defined the dissimilarity between the two groups. Group 1 was composed with the better water quality and concentrations of attributes were close to the recommended limit defined by resolution 357/05 of CONAMA. Whereas Group 2 presented average concentrations of chlorophyll 'a' and total phosphorus two times greater than the ones registered in Group 1, there for been above the limit established by CONAMA (357/05) for human consumption. The reservoir presents characteristics that point toward eutrophization due to the use and management of the soil around said reservoir.Key words -Water quality. Cluster Analysis. Eutrophization.Resumo -Este estudo foi conduzido no açude Serrote (barragem Edson Queiroz), localizado na bacia do rio Groaíras, no norte do estado do Ceará, objetivando-se investigar a variabilidade espaço-temporal da qualidade da água. Foram coletadas amostras de água em quatro pontos do corpo hídrico, durante os meses de fevereiro, maio e agosto de 2007 e maio e agosto de 2008, totalizando cinco campanhas. Os parâmetros considerados neste estudo foram Condutividade Elétrica da água (CE), potencial hidrogeniônico (pH), oxigênio dissolvido (OD), temperatura (T), fósforo total (P) e clorofila 'a'. As investigações dos dados foram realizadas pelo emprego de análise multivariada (análise de agrupamento) e técnicas de geoprocessamento. Dois grupos homogêneos foram formados independentes do ponto de amostragem, expressando assim, a maior influência da sazonalidade interanual. O estudo mostrou que as maiores concentrações dos elementos investigados foram registrados no ano de 2008, que apresentou totais pluviométricos superiores a média normal em 53%. A dissimilaridade entre os dois grupos foi definida pela clorofila 'a' e o fósforo total. O grupo 1 apresentou águas de melhor qualidade, com concentrações em torno dos limites estabelecidos pelo CONAMA (357/05). Já o grupo 2 apresentou concentrações médias da clorofila 'a' e do fósforo total duas vezes superiores as registradas no grupo 1, estando as mesmas sempre superiores aos limites estabelecidos pelo CONAMA (357/05) p...

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“…Moreover, a dilution effect of NaNO 2 , NO 2 and NO 2 -N as well as Total Dissolved Solids (and, as a consequence, of electrical conductivity and salinity) was observed downstream of tropical rivers (Rodrigues et al, 2018). Analyzing the impacts of human activities in reforested basins, Castro and Mendonça (2004) found an improvement in the quality of in relation to the amount of nitrate and nitrite in microbasins with dense vegetation cover and in advanced regeneration phase. The same Authors also recorded higher amounts of nitrate due to agricultural practices and soil exposure by low effective protection coverage, in addition to that of fertilizers.…”

Section: Discussionmentioning

confidence: 94%

“…The spring "N3" had a domestic sewage at its headwater; this fact may have contributed to the spatial variation of turbidity and color, increasing the presence of suspended solids in water and the sediment transport downstream, which interfere with light penetration through the water. Effluents pouring into streams is in fact an important factor that controls water quality parameters (Castro and Mendonça, 2004). Many different studies have shown that agricultural land uses at catchment scale is a primary predictor for water quality compounds (Smart et al, 1998;Ferrier et al, 2001;Ahearn et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Effects of land use and sampling distance on water quality in tropical headwater springs (Pimenta creek, São Paulo State, Brazil)

Marmontel

Lucas‐Borja

Rodrigues

et al. 2018

Science of The Total Environment

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In tropical headwater streams information on water quality are in general scarce. • Both land use and sampling distances influence water quality of headwaters. • Springs with riparian vegetation show better conditions in the aquatic environment. • In springs with pasture/agriculture and degraded vegetation water quality is worse. • Aquatic environment of headwaters is very sensitive to changes in the environment.

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Impactos de Ações Antrópicas em Bacias de Manancial Rurais de Montanha Sobre Parâmetros de Qualidade de Água

Cited by 4 publications

References 0 publications

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

Parâmetros Indicativos para Qualidade da Água em Nascentes com Diferentes Coberturas de Terra e Conservação da Vegetação Ciliar

The water quality investigation using GIS and multivariable analysis in a semiarid region reservoir

Effects of land use and sampling distance on water quality in tropical headwater springs (Pimenta creek, São Paulo State, Brazil)

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