A satellite-based investigation into the algae bloom variability in large water supply urban reservoirs during COVID-19 lockdown

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Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.contributorLeibniz-Institute of Freshwater Ecology and Inland Fisheries-
Autor(es): dc.contributorScience and Technology of Pará State-
Autor(es): dc.contributorNanyang Technological University-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.creatorAlcantara, Enner-
Autor(es): dc.creatorCoimbra, Keyla-
Autor(es): dc.creatorOgashawara, Igor-
Autor(es): dc.creatorRodrigues, Thanan-
Autor(es): dc.creatorMantovani, José-
Autor(es): dc.creatorRotta, Luiz Henrique-
Autor(es): dc.creatorPark, Edward-
Autor(es): dc.creatorFernandes Cunha, Davi Gasparini-
Data de aceite: dc.date.accessioned2025-08-21T18:13:58Z-
Data de disponibilização: dc.date.available2025-08-21T18:13:58Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2021-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.rsase.2021.100555-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/233151-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/233151-
Descrição: dc.descriptionHere we report the first case study of the significant algae blooming in large reservoirs in relation to the COVID-19 lockdown in Sao Paulo, Brazil. Chlorophyll-a (Chl-a) and phycocyanin (PC) concentrations were estimated for the Guarapiranga and Billings reservoirs, which supply daily water use for over 20 million people and receives treated wastewater. We employed field-calibrated Sentinel 2 MSI and Landsat 8 OLI images to map the spatial patterns of Chl-a and PC over the two periods: before the lockdown (April, August and October 2019) and after the lockdown in São Paulo (April 2020). We found a significant increase in algae pigments (Chl-a and PC) in both reservoirs in April 2020, compared to the same month of 2019. We show that the episodic algae blooming is strongly related to the increased inflows of the residential wastewater from the surrounding watersheds, because the household water use has increased ~3.2% in April 2020, while the runoff into the reservoirs driven by the rainfall was much lower in 2020 compared to the previous year for the same month. In the case of Guarapiranga Reservoir, PC increased nearly 500% in April 2020 compared to April 2019. Given the importance of Billings and Guarapiranga reservoirs for the water supply of the Metropolitan Region of Sao Paulo (MRSP), the abrupt occurrence of cyanobacteria blooms related to the state's lockdown should be considered a major concern for public and environmental health of the region. Although several environmental consequences have been reported due to the COVID-19 worldwide, this study is the first to report the impact of COVID-19 on the trophic state in the tropical reservoirs.-
Descrição: dc.descriptionNanyang Technological University-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionInstitute of Science and Technology São Paulo State University, São José dos Campos-
Descrição: dc.descriptionInstitute of Geosciences University of Campinas, São Paulo-
Descrição: dc.descriptionLeibniz-Institute of Freshwater Ecology and Inland Fisheries, Neuglobsow-
Descrição: dc.descriptionFederal Institute of Education Science and Technology of Pará State-
Descrição: dc.descriptionFaculty of Sciences and Technology São Paulo State University, São Paulo-
Descrição: dc.descriptionNational Institute of Education Nanyang Technological University-
Descrição: dc.descriptionSão Carlos School of Engineering University of São Paulo, São Carlos-
Descrição: dc.descriptionInstitute of Science and Technology São Paulo State University, São José dos Campos-
Descrição: dc.descriptionFaculty of Sciences and Technology São Paulo State University, São Paulo-
Descrição: dc.descriptionFAPESP: 19/00259-0-
Idioma: dc.languageen-
Relação: dc.relationRemote Sensing Applications: Society and Environment-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAlgae bloom-
Palavras-chave: dc.subjectCOVID-19-
Palavras-chave: dc.subjectCyanobacteria-
Palavras-chave: dc.subjectWater quality-
Palavras-chave: dc.subjectWater supply-
Título: dc.titleA satellite-based investigation into the algae bloom variability in large water supply urban reservoirs during COVID-19 lockdown-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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