Water quality assessment using Sentinel-2 imagery ... - BV FAPESP
Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Water quality assessment using Sentinel-2 imagery with estimates of chlorophyll a, Secchi disk depth, and Cyanobacteria cell number: the Cantareira System reservoirs (Sao Paulo, Brazil)

Full text
Author(s):
Pompeo, Marcelo [1] ; Moschini-Carlos, Viviane [2] ; Bitencourt, Marisa Dantas [1] ; Soria-Perpinya, Xavier [3] ; Vicente, Eduardo [3] ; Delegido, Jesus [4]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Dept Ecol, Sao Paulo - Brazil
[2] Univ Sao Paulo State UNESP, ICT, Sorocaba Campus, Sorocaba - Brazil
[3] Univ Valencia, Dept Microbiol & Ecol, Burjassot Campus, Burjassot - Spain
[4] Univ Valencia, Image Proc Lab, Paterna Campus, Paterna - Spain
Total Affiliations: 4
Document type: Journal article
Source: Environmental Science and Pollution Research; v. 28, n. 26, SI, p. 34990-35011, JUL 2021.
Web of Science Citations: 1
Abstract

Satellite images were used to assess surface water quality based on the concentration of chlorophyll a (chla), light penetration measured by the Secchi disk method (SD), and the Cyanobacteria cells number per mL (cyano). For this case study, six reservoirs interconnected were evaluated, comprising the Cantareira System (CS) in Sao Paulo State (Brazil). The work employed Sentinel-2 images from 2015 to 2018, SNAP image processing software, and the native products conc\_chl and kd\_z90max, treated using Case 2 Regional Coast Color (C2RCC) atmospheric correction. The database was obtained from CETESB, the agency legally responsible for operation of the Inland Water Quality Monitoring Network in Sao Paulo State. The results demonstrated robustness in the estimates of chla (RMSE = 3.73; NRMSE% = 19%) and SD (RMSE = 2,26; NRMSE% = 14%). Due to the strong relationship between cyano and chla (r(2) = 0.84, p < 0.01, n = 90), both obtained from field measurements, there was also robustness in cyano estimates based on the estimates of chla from the satellite images. The data revealed a clear pattern, with the upstream reservoirs being more eutrophic, compared to those downstream. There were evident concerns, about water quality, particularly due to the high numbers of Cyanobacteria cells, especially in the upstream reservoirs. (AU)

FAPESP's process: 16/24528-2 - Metals in sediments of São Paulo State reservoirs: subsidy to decision making through geostatistical and ecotoxicological approaches
Grantee:Marcelo Luiz Martins Pompêo
Support Opportunities: Regular Research Grants
FAPESP's process: 16/17266-1 - The European Union Water Framework Directive: applications using the phytoplankton as an environmental discriminator in Brazilian reservoirs
Grantee:Viviane Moschini Carlos
Support Opportunities: Regular Research Grants
FAPESP's process: 19/10845-4 - Water quality of São Paulo reservoirs: the weight of evidence
Grantee:Marcelo Luiz Martins Pompêo
Support Opportunities: Regular Research Grants