Agentes naturais e antrópicos modificadores da qualidade da água e dos sedimentos nas áreas marginais da Lagoa da Conceição, SC

Dias, Bruna Borba; Parizotto, Bianca Alves Dias Martins; Bonetti, Carla

doi:10.14210/bjast.v18n1.p33-43

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…transportation, recreation, and sports (Martini et al, 2006). The lagoon has a surface area of about 20 km 2 and a heterogeneous bathymetry, with extensive sandbanks of less than 1 m water depth contrasting with muddy sediment regions of up to 8.7 m water depth (Dias et al, 2014). According to the morphological features and water properties, the lagoon is traditionally divided into three subsystems: North Lagoon, Central Lagoon and South Lagoon (Martini et al, 2006;Lisboa et al, 2008;Lüchmann et al, 2008;Fontes et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

The Wastewater Contamination Index: A methodology to assess the risk of wastewater contamination from satellite-derived water quality indicators

Arcari

Távora²,

Wal³

et al. 2023

Front. Environ. Sci.

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One of the major sources of pollution affecting inland and coastal waters is related to poorly treated or untreated wastewater discharge, particularly in urbanized watersheds. The excess of nutrients, organic matter, and pathogens causes an overall deterioration of water quality and impairs valuable ecosystem services. The detection of wastewater pollution is essential for the sustainable management of inland and coastal waters, and remote sensing has the capability of monitoring wastewater contamination at extended spatial scales and repeated frequencies. This study employed satellite-derived water quality indicators and spatiotemporal analysis to assess the risk of wastewater contamination in Conceição Lagoon, a coastal lagoon in Southern Brazil. Using an analytical model, three water quality indicators were derived from Level 2A Sentinel-2 MSI images: the absorption coefficients of chlorophyll-a and detritus combined with coloured dissolved organic matter, and the backscattering coefficient of suspended solids. The temporal standardized anomalies were calculated for each water quality indicator for the period of 2019–2021, and their anomalies during a known outfall event were used to evaluate spatial variation modes. The spatial mode explaining most of the variability was used to estimate weights for the water quality indicators anomalies in a linear transformation that can indicate the risk of wastewater contamination. Results showed that the wastewater spatial mode for this region was characterized by positive anomalies of backscattering coefficient of particulate matter and absorption coefficient of detritus combined with coloured dissolved organic matter, each with a relative importance of 50%. The application of this spatiotemporal analysis was formulated as the Wastewater Contamination Index. With the aid of photographic records, and additional meteorological and water quality data, the results of the index were verified for wastewater outfall events in the study area. The methodology for constructing the proposed Wastewater Contamination Index applies to other locations and can be a valuable tool for operational monitoring of wastewater contamination.

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Section: Introductionmentioning

confidence: 99%

The Wastewater Contamination Index: A methodology to assess the risk of wastewater contamination from satellite-derived water quality indicators

Arcari

Távora²,

Wal³

et al. 2023

Front. Environ. Sci.

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“…In the 1980s, this lagoon was already considered eutrophic (Odebrecht and Caruso Jr 1987) and in the 1990s, the number of inhabitants in its surroundings tripled (IBGE 2000), increasing nutrient and organic matter intake in this ecosystem. In general, the highest concentrations of nutrients were recorded after rainy periods, near river mouths and in the vicinity of domestic effluent discharge points (Souza Sierra et al 1999;Dias et al 2014), also interfering directly in the decrease of the salinity of these environments.…”

Section: Introductionmentioning

confidence: 99%

Diversity and space-time dynamics of fish assemblages in a coastal lagoon, western Atlantic

Cattani¹,

Ribeiro²,

Cardoso³

et al. 2019

NBC

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The knowledge of the temporal and spatial dynamics in the composition of fish fauna makes it possible to identify patterns of occupation of ecosystems, providing a basis for evaluation and preservation of the local biodiversity. Monthly samplings were carried out at seven sites in a coastal lagoon, using a casting net, dip net and beach seine. A total of 4,110 individuals were collected, distributed in 23 families and 49 taxa of fish, with a predominance of Mugilliza, M.curema, Atherinellabrasiliensis, Micropogoniasfurnieri and Eucinostomusargenteus, corresponding to more than 80% total weight of all individuals caught. Regarding seasonality, greater abundances were recorded in fall, influenced by the high abundance of A.brasiliensis in this period. In addition to fall, this species was also abundant in summer. However, this pattern of dominance was different for the families Mugilidae and Gerreidae, with higher abundances in spring and summer, respectively. The highest abundances were found in the southern section of the lagoon, which are related to the high abundance of A.brasiliensis, M.liza and M.curema. In relation to the indices of average taxonomic distinctness and variation in the taxonomic distinctness, no significant differences were detected between the seasons of the year. Thus, the patterns of distribution and occurrence of fish in the lagoon were consistent with the patterns observed in Brazilian coastal lagoons and estuaries, as well as to the coastal shallow areas of the southeastern and southern regions.

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The Urban Pressure Over the Sediment Contamination in a Southern Brazil Metropolis: the Case of Diluvio Stream

Santos

Andrade

Tiecher

et al. 2020

Water Air Soil Pollut

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Agentes naturais e antrópicos modificadores da qualidade da água e dos sedimentos nas áreas marginais da Lagoa da Conceição, SC

Cited by 5 publications

References 13 publications

The Wastewater Contamination Index: A methodology to assess the risk of wastewater contamination from satellite-derived water quality indicators

The Wastewater Contamination Index: A methodology to assess the risk of wastewater contamination from satellite-derived water quality indicators

Diversity and space-time dynamics of fish assemblages in a coastal lagoon, western Atlantic

The Urban Pressure Over the Sediment Contamination in a Southern Brazil Metropolis: the Case of Diluvio Stream

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