A comparative study of trends of nitrate, chloride and phosphate concentration levels in selected urban rivers

Sulaiman, Rahizah; Ismail, Zubaidah; Othman, Siti Zulaikha; Ramli, Abu Hanipah; Shirazi, Sharif Moniruzzaman

doi:10.1016/j.measurement.2014.04.035

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…Low chloride concentrations are essential for normal cell function. However, high concentrations contaminate freshwater streams and lakes causing damage to aquatic life (Sulaiman et al, 2014). The major anthropogenic sources of Cl -are domestic sewage and the use of agricultural inputs, such as KCl, which is used as a potassium source.…”

Section: Physical and Chemical Variablesmentioning

confidence: 99%

Farming and soil urban occupation in the water quality of Jaboticabal and Cerradinho streams

et al. 2016

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Since the end of the twentieth century, 100% of the urban sewage from the city of Jaboticabal has been collected by interceptors and routed to a treatment plant. Between 1999 and 2000, studies on the effect of this environmental care showed that it did not efficiently clean up the water from the two streams that run through the city and flow into an agricultural area. This paper focuses on assessing the influence of soil use on the water quality of surface waters from these two streams. The study was conducted 15 years after the implementation of sewage interceptors. The sampling dates were bimonthly at eight points (P1 to P8) in the Cerradinho and Jaboticabal streams, in Jaboticabal (São Paulo State, Brazil). P1 was located at the source of the Jaboticabal stream, P2 was in a farming area, P3, P4 and P5 were in an urban area, and P6, P7 and P8 were in a farming area. The physical and chemical variables of the water were assessed. We compared the ability of microorganisms to metabolize different sources of carbon using the EcoPlate (Biolog). The total phosphorus (TP) concentration exceeded the limit set by the Brazilian legislation as well as values found in previous studies, which was also observed for the chemical oxygen demand. However, the bacterial metabolic profile had no association with urban or farming practices. The results of the analysis indicated the possibility of clandestine discharge of wastewater in the streams studied and the influence of the agricultural soil.Index terms: Leaching; EcoPlate; metabolic profile; water resources. RESUMODesde o final do século vinte, 100% do esgoto urbano da cidade de Jaboticabal é recolhido por interceptores e conduzido a uma estação de tratamento. Entre 1999 e 2000, estudos sobre o efeito desse cuidado ambiental, mostraram que a coleta de esgoto ainda não tinha sido eficiente para despoluir as águas dos dois córregos que atravessam a cidade e fluem para uma área agrícola. Neste trabalho avalia-se a influência do uso do solo na qualidade da água destes dois córregos. O estudo foi realizado 15 anos após a implantação dos interceptores de esgoto. Durante o ano de 2014, bimestralmente, coletaram-se amostras de água em oito pontos (P1 a P8), dos córregos Cerradinho e Jaboticabal, em Jaboticabal (SP, Brasil). P1 estava localizado na nascente do córrego Jaboticabal; P2 em área agrícola; P3, P4 e P5 em área urbana; P6, P7 e P8 em área agrícola. Foram determinadas variáveis físicas e químicas e a comparação metabólica da população microbiana em diversas fontes de carbono pelo método EcoPlate (Biolog). Em todos os pontos e coletas, o teor de fósforo total excedeu o limite estabelecido pela legislação brasileira, assim como valores encontrados em estudos anteriores, o que também foi observado em relação à demanda química de oxigênio. Entretanto, a população microbiana da água parece não estar sendo alterada pelas atividades urbanas e agrícolas. Os resultados das análises sinalizam à possibilidade de descarga clandestina de águas residuárias nos córregos estudados e...

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Section: Physical and Chemical Variablesmentioning

confidence: 99%

Farming and soil urban occupation in the water quality of Jaboticabal and Cerradinho streams

et al. 2016

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“…Research results in southern Malawi reveal that anthropogenic activities have negatively affected low flow environmental flow requirements by increasing zero flow days in Rivirivi River Catchment (Chimtengo et al, 2014). Over the period of thirteen years from 1997 to 2009 in Malaysia, the results of efforts that included public participation, engineering and river works and strict statutory regulations by government had demonstrated success in improving the river water quality (Sulaiman et al, 2014). Hydrology and water resources usually involve a system of concepts, principles, and methods in order to deal with modes of reasoning which are approximate rather than exact.…”

Section: Introductionmentioning

confidence: 99%

Surface Water Contamination Risk Assessment Modeled by Fuzzy‐WRASTIC

Alavipoor¹,

Ghorbaninia²,

Karimi³

et al. 2016

Water Environment Research

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This research provides a Fuzzy-WRASTIC new model for water resource contamination risk assessment in a GIS (Geographic Information System) environment. First, this method setting in a multi-criteria evaluation framework (MCE) reviewed and mapped the sub criteria of every above-mentioned criterion. Then, related sub-layers were phased by the observance of GIS environment standards. In the next step, first the sub-layers were combined together, next the modeling of pollution risk status was done by utilizing a fuzzy overlay method and applying the OR, AND, SUM, PRODUCT and GAMMA operators by using WLC (Weighted Linear Combination) method and providing weights in the WRASTIC model. The results provide the best combination of modeling and the percentages of its risk categories of low, medium, high and very high, which are respectively 1.8, 14.07, 51.43 and 32.7. More areas have severe risk due to the unbalanced arrangement and compact of land uses around the compact surface water resources.

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Environmental Scan and Framework of Watershed Risk Assessment in Malaysia

Alam

Mokhtar

et al. 2018

Environmental Risk Analysis for Asian-Oriented, Risk-Based Watershed Management

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A comparative study of trends of nitrate, chloride and phosphate concentration levels in selected urban rivers

Cited by 6 publications

References 22 publications

Farming and soil urban occupation in the water quality of Jaboticabal and Cerradinho streams

Farming and soil urban occupation in the water quality of Jaboticabal and Cerradinho streams

Surface Water Contamination Risk Assessment Modeled by Fuzzy‐WRASTIC

Environmental Scan and Framework of Watershed Risk Assessment in Malaysia

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