Comparison between water quality indices in watersheds of the Southern Bahia (Brazil) with different land use

Lopes, Olandia Ferreira; Jesus, Raildo Mota de; Sousa, Lucas Farias de; Rocha, Felizardo Adenilson; Silva, Daniela Mariano Lopes da; Amorim, Andrique Figueiredo; Silva, Vinnícius Henrique Cerqueira da; Navoni, Júlio Alejandro

doi:10.1007/s11356-020-10941-7

Cited by 18 publications

(7 citation statements)

References 59 publications

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“…where n is the total number of water quality parameters studied, Ci is the normalized value of parameter i, and Pi is the assigned weighting of the ith parameter. WQI values range from 0 to 100, and water quality is divided into five levels according to the WQI score: excellent (91-100), good (71-90), medium (51-70), poor (26-50) and very poor (0-25) [32].…”

Section: Water Quality Analysismentioning

confidence: 99%

Land Use Impact on Water Quality and Phytoplankton Community Structure in Danjiangkou Reservoir

Zhu,

Gao,

Zhao

et al. 2024

Diversity

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The composition and intensity of land use significantly influence the aquatic ecological environment, further affecting the physicochemical attributes of the water body, and indirectly modulating the phytoplankton community structure. This study centers around the Danjiangkou Reservoir, investigating the correlation between land use, water environment, and phytoplankton alongside varying intensities of anthropogenic activities, based on the review of land use, phytoplankton, and water quality data of 2021. Firstly, an analysis was conducted over five circular buffer zones generated around sampling points with radii set at 500 m, 1000 m, 1500 m, 2000 m, and 2500 m, wherein the intensity of human activity was categorized into low, medium, and high, in accordance with the human activity intensity level score (HAILS). This study proceeded to explore the correlation between land use and the water environment across different scales, compared phytoplankton density and community structure differences across varied levels of human activity, and analyzed the association between phytoplankton communities in the Danjiangkou Reservoir and environmental variables under various intensities. The findings showed: The land use within the 500 m circular buffer zone has the greatest impact on the water quality of the Danjiangkou Reservoir, especially with the increase in human activities leading to elevated nutrient levels in the water, thereby promoting the growth and reproduction of algae, and increasing the risk of algal blooms. This research scrutinizes the relationship between land use, water environment, and plankton under varying human activity intensities, serving as a foundation for environmental management sectors to make informed decisions and promote the sustainable development of the catchment water environment.

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Section: Water Quality Analysismentioning

confidence: 99%

Land Use Impact on Water Quality and Phytoplankton Community Structure in Danjiangkou Reservoir

Zhu,

Gao,

Zhao

et al. 2024

Diversity

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“…As hypothesized (H1), the downstream alpha diversity was significantly lower than that of the upstream, indicating that the diversity of microeukaryotes decreased significantly with the severity of water quality damage in the lentic-lotic continuum catchment. The decrease of downstream diversity may be due to the excessive interference of urban and agricultural activities on the water environment (higher TN and TP) ( Teng et al, 2011;Hao et al, 2012;Hosen et al, 2017;Santos et al, 2017;Lopes et al, 2021). The variabilities of the community composition in BYD were significantly lower than that of upstream and downstream communities, reflecting significant changes in relative abundances of various taxa in upstream and downstream.…”

Section: Changes In Microeukaryotic Biodiversitymentioning

confidence: 99%

Microeukaryotic Community Shifting Along a Lentic-Lotic Continuum

Wang

Ren

et al. 2022

Front. Ecol. Evol.

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As an important regulator of ecosystem functions in river systems, microeukaryotes play an important role in energy and material conversion, yet little is known about the shift along a lentic-lotic continuum. In this study, the 18S rRNA genes sequencing was used to identify the microeukaryotic communities at 82 sites along a lentic-lotic continuum with the aim of understanding the impact of upstream inlet river on microeukaryotic communities in Baiyang Lake (BYD) and its downstream. Our results showed that the upstream inlet river affected the diversity and community composition of microeukaryotes in BYD and downstream rivers, and environmental variables greatly affected the composition of microeukaryotic community. The community composition in BYD had lower variabilities. Co-occurrence network analysis revealed that the network was non-random and clearly parsed into three modules, and different modules were relatively more abundant to a particular area. As keystone taxa, some nodes of the upstream microeukaryotic network played an important role in structuring network and maintaining the stability of the ecosystem. In BYD and downstream, the microeukaryotic network was highly fragmented, and the loss of keystone taxa would have an adverse impact on the integrity and function of the microeukaryotic community. Microeukaryotes had strong tendencies to co-occur, which may contribute to the stability and resilience of microeukaryotic communities. Overall, these findings extend the current understanding of the diversity and community composition of microeukaryotic along a lentic-lotic continuum.

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“…Incorporam nas funções matemáticas de agregação final, valores padrões de referência para os parâmetros analisados, que podem ser baseados na legislação. Este é o caso do IQA CCME, que já foi aplicado em estudos no Brasil (e.g., Lopes et al, 2021;Oliveira et al, 2021;Val;Moleiro;Oliveira, 2022) e do NPI, que até o presente momento parece ter aplicação insipiente no país.…”

Section: Introductionunclassified

Qualidade da água em bacia hidrográfica do nordeste brasileiro: aplicação do IQA CCME e do índice de poluição de Nemerow

Moreira,

Da Silva,

De Araújo

et al. 2024

CLCS

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A qualidade das águas superficiais na bacia do Salgado, Estado do Ceará, nordeste do Brasil, foi avaliada no período de 2018 a 2022. O estudo compreendeu nove pontos de amostragem com o emprego do Índice de Qualidade da Água CCME (IQA CCME) e do Índice de Poluição de Nemerow (NPI). Os resultados de monitoramento foram cotejados com os padrões estabelecidos para corpos de Água Doce, Classe 2, definidos na Resolução do CONAMA n.º 357/2005. De modo geral, os resultados mostraram que a qualidade da água, na área de estudo, variou entre “Ligeiramente Poluído” a “Fortemente Poluído”, de acordo com NPI, e entre “Bom” e “Ruim”, segundo IQA CCME. Os pontos SA5 (rio Salgadinho, em Juazeiro do Norte) e SA6 (rio Salgadinho, em Crato) apresentaram maior comprometimento da qualidade da água, indicado pelas classes apontadas pelos índices, que na maioria dos anos foi “Fortemente Poluído” (NPI) e “Ruim” (IQA CCME). Os resultados mostraram que esses locais estavam mais antropizados quando comparado aos demais pontos. Como índice agregado o NPI foi mais sensível e restritivo que o IQA CCME. O NPI enfatiza o efeito de poluentes de maior concentração. Recomenda-se a utilização do IQA CCME para os programas de monitoramento de rotina, e o NPI, de forma cautelosa, para investigações aprofundadas sobre áreas poluídas, como perícias em investigações de crimes ambientais.

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Comparison between water quality indices in watersheds of the Southern Bahia (Brazil) with different land use

Cited by 18 publications

References 59 publications

Land Use Impact on Water Quality and Phytoplankton Community Structure in Danjiangkou Reservoir

Land Use Impact on Water Quality and Phytoplankton Community Structure in Danjiangkou Reservoir

Microeukaryotic Community Shifting Along a Lentic-Lotic Continuum

Qualidade da água em bacia hidrográfica do nordeste brasileiro: aplicação do IQA CCME e do índice de poluição de Nemerow

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