{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,13]],"date-time":"2025-10-13T15:30:16Z","timestamp":1760369416503,"version":"build-2065373602"},"reference-count":48,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2018,2,2]],"date-time":"2018-02-02T00:00:00Z","timestamp":1517529600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"S\u00e3o Paulo Research Foundation (FAPESP)","award":["2012\/19821-1","2013\/09045-7","2015\/18525-8","2015\/21586-9"],"award-info":[{"award-number":["2012\/19821-1","2013\/09045-7","2015\/18525-8","2015\/21586-9"]}]},{"name":"National Council Scientific and Technological Development (CNPq)","award":["472131\/2012-5","400881\/2013-6","482605\/2013-8"],"award-info":[{"award-number":["472131\/2012-5","400881\/2013-6","482605\/2013-8"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>The high nutrient concentrations coming from non-point and point pollution have been linked to algae blooms, especially in hydroelectric plant reservoirs, due to higher residence time compared to rivers. The monitoring of algae is important to prevent risk of contamination by toxins in reservoirs used for drinking water supply. In this context, a physical model-based approach was adopted to retrieve chlorophyll-a (chl a) concentration, a photosynthetic pigment found in all phytoplankton species. We assumed that a semi-analytical algorithm parameterized to a eutrophic reservoir could also be applied to other eutrophic reservoirs, at least the specific inherent optical properties (SIOPs) are not similar. The parameterization was carried out based on Ocean and Land Color Instrument (OLCI) bands aboard Sentinel-3 spacecraft. In our study, the semi-analytical approach showed good performance in retrieving chl a content, with a normalized root mean square error (NRMSE) of 18.7%. The findings encourage the use of a unique semi-analytical algorithm in a reservoir cascade, where the impoundments present similar bio-optical status. The good performance of the algorithm indicates that this approach is rather useful in predicting trophic status in reservoirs.<\/jats:p>","DOI":"10.3390\/rs10020227","type":"journal-article","created":{"date-parts":[[2018,2,2]],"date-time":"2018-02-02T06:45:40Z","timestamp":1517553940000},"page":"227","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Estimation of Chlorophyll-a Concentration from Optimizing a Semi-Analytical Algorithm in Productive Inland Waters"],"prefix":"10.3390","volume":"10","author":[{"given":"Fernanda","family":"Watanabe","sequence":"first","affiliation":[{"name":"Department of Cartography, Faculty of Sciences and Technology, S\u00e3o Paulo State University (UNESP), Rua Roberto Simonsen 305, Presidente Prudente 19060-900, SP, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7777-2119","authenticated-orcid":false,"given":"Enner","family":"Alc\u00e2ntara","sequence":"additional","affiliation":[{"name":"Department of Environmental Engineering, Institute of Science and Technology, S\u00e3o Paulo State University (UNESP), Rodovia Presidente Dutra Km 137.8, S\u00e3o Jos\u00e9 dos Campos 12247-004, SP, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0516-0567","authenticated-orcid":false,"given":"Nilton","family":"Imai","sequence":"additional","affiliation":[{"name":"Department of Cartography, Faculty of Sciences and Technology, S\u00e3o Paulo State University (UNESP), Rua Roberto Simonsen 305, Presidente Prudente 19060-900, SP, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4302-4216","authenticated-orcid":false,"given":"Thanan","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Federal Institute of Education, Science and Technology from Par\u00e1, Rodovia BR 316, km 61, Castanhal 68740-970, PA, Brazil"}]},{"given":"Nariane","family":"Bernardo","sequence":"additional","affiliation":[{"name":"Department of Cartography, Faculty of Sciences and Technology, S\u00e3o Paulo State University (UNESP), Rua Roberto Simonsen 305, Presidente Prudente 19060-900, SP, Brazil"}]}],"member":"1968","published-online":{"date-parts":[[2018,2,2]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1378","DOI":"10.1109\/TGRS.2003.812907","article-title":"Satellite hyperspectral remote sensing for estimating estuarine and coastal water quality","volume":"41","author":"Brando","year":"2003","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"10391","DOI":"10.3390\/ijerph120910391","article-title":"Estimation of chlorophyll-a concentration and the trophic state of the Barra Bonita hydroelectric reservoir using OLI\/Landsat-8 images","volume":"12","author":"Watanabe","year":"2015","journal-title":"Int. J. Environ. Res. Public Health"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Salem, S.I., Strand, M.H., Higa, H., Kim, H., Kazuhiro, K., Oki, K., and Oki, T. (2017). Evaluation of MERIS chlorophyll-a retrieval processors in a complex turbid lake Kasumigaura over a 10-year mission. Remote Sens., 9.","DOI":"10.3390\/rs9101022"},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Kirk, J.T.O. (2011). Light and Photosynthesis in Aquatic Ecosystems, Cambridge University Press. [3rd ed.].","DOI":"10.1017\/CBO9781139168212"},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"2402","DOI":"10.1016\/j.rse.2011.05.003","article-title":"Remote sensing of water quality in an Australian tropical freshwater impoundment using matrix inversion and MERIS images","volume":"115","author":"Campbell","year":"2011","journal-title":"Remote Sens. Environ."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"492","DOI":"10.2307\/1312927","article-title":"Remote sensing of algal bloom dynamics: New research fuses remote sensing of aquatic ecosystems with algal accessory pigment analysis","volume":"46","author":"Richardson","year":"1996","journal-title":"Bioscience"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"10909","DOI":"10.1029\/JD093iD09p10909","article-title":"A seminalytical radiance model of ocean color","volume":"93","author":"Gordon","year":"1988","journal-title":"J. Geophys. Res."},{"key":"ref_8","unstructured":"Mobley, C.D. (1994). Light and Water: Radiative Transfer in Natural Waters, Academic Press."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"16631","DOI":"10.1029\/96JC01414","article-title":"Satellite retrieval of inherent optical properties by linear matrix inversion of oceanic radiance models: An analysis of model and radiance measurement errors","volume":"101","author":"Hoge","year":"1996","journal-title":"J. Geophys. Res."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"2705","DOI":"10.1364\/AO.41.002705","article-title":"Optimization of a semianalytical ocean color model for global-scale applications","volume":"41","author":"Maritorena","year":"2002","journal-title":"Appl. Opt."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"1247","DOI":"10.1016\/j.rse.2011.01.007","article-title":"Estimating constituent concentrations in case II waters from MERIS satellite data by semi-analytical model optimizing and look-up tables","volume":"115","author":"Yang","year":"2011","journal-title":"Remote Sens. Environ."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1016\/j.scitotenv.2012.07.023","article-title":"A semi-analytical algorithm for remote estimation of phycocyanin in inland waters","volume":"435\u2013436","author":"Li","year":"2012","journal-title":"Sci. Total Environ."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"2808","DOI":"10.1364\/AO.51.002808","article-title":"Adaptive semianalytical inversion of ocean color radiometry in optically complex waters","volume":"51","author":"Brando","year":"2012","journal-title":"Appl. Opt."},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Pyo, J.C., Pachepsky, Y., Baek, S.S., Kwon, Y.S., Kim, M.J., Lee, H., Park, S., Cha, Y.K., Ha, R., and Nam, G. (2017). Optimizing semi-analytical algorithms for estimating chlorophyll-a and phycocyanin concentrations in inland waters in Korea. Remote Sens., 9.","DOI":"10.3390\/rs9060542"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"755","DOI":"10.1016\/j.rse.2008.12.003","article-title":"A physcis based retrieval and quality assessment of bathymetry from suboptimal hyperspectral data","volume":"113","author":"Brando","year":"2009","journal-title":"Remote Sens. Environ."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"213","DOI":"10.1016\/j.rse.2017.06.018","article-title":"Retrieval of Secchi disk depth from reservoir using a semi-analytical scheme","volume":"198","author":"Rodrigues","year":"2017","journal-title":"Remote Sens. Environ."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"3831","DOI":"10.1364\/AO.38.003831","article-title":"Hyperspectral remote sensing for shallow waters: 2. Deriving bottom depths and water properties by optimization","volume":"38","author":"Lee","year":"1999","journal-title":"Appl. Opt."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"5755","DOI":"10.1364\/AO.41.005755","article-title":"Deriving inherent optical properties from water color: A multiband quasi-analytical algorithm for optically deep waters","volume":"41","author":"Lee","year":"2002","journal-title":"Appl. Opt."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"11639","DOI":"10.1029\/2000JC000554","article-title":"Properties of the water column and bottom derived from airborne visible infrared imaging spectrometer (AVIRIS) data","volume":"106","author":"Lee","year":"2001","journal-title":"J. Geophys. Res."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"144","DOI":"10.1080\/07038992.1998.10855234","article-title":"Retrieval of chlorophyll and suspended matter in inland waters from CASI data by matrix inversion","volume":"24","author":"Hoogenboom","year":"1998","journal-title":"Can. J. Remote Sens."},{"key":"ref_21","unstructured":"Tundisi, J.G., and Stra\u0161kraba, M. (1999). The cascading reservoir continuum concept (CRCC) and its application to the river Tiet\u00ea-basin, S\u00e3o Paulo State, Brazil. Theoretical Reservoir Ecology and Its Application, International Institute of Ecology."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"28","DOI":"10.1016\/j.isprsjprs.2016.08.009","article-title":"Parameterization and calibration of a quasi-analytical algorithm for tropical eutrophic waters","volume":"121","author":"Watanabe","year":"2016","journal-title":"ISPRS J. Photogram. Remote Sens."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1127\/1863-9135\/2008\/0171-0027","article-title":"Phytoplankton taxonomic composition and temporal changes in a tropical reservoir","volume":"171","author":"Vieira","year":"2008","journal-title":"Arch. Hydrobiol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1079","DOI":"10.1590\/S1519-69842008000500015","article-title":"The ecological dynamics of Barra Bonita (Tiet\u00ea River, SP, Brazil) reservoir: Implications for its biodiversity","volume":"68","author":"Tundisi","year":"2008","journal-title":"Braz. J. Biol."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"815","DOI":"10.1590\/S1519-69842010000400012","article-title":"Cold fronts and reservoir limnology: An integrated approach towards the ecological dynamics of freshwater ecosystems","volume":"70","author":"Tundisi","year":"2010","journal-title":"Braz. J. Biol."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"67","DOI":"10.1023\/B:HYDR.0000008509.47900.fc","article-title":"Denitrification and bacterial community structure in the cascade of six reservoirs on a tropical in Brazil","volume":"504","author":"Abe","year":"2003","journal-title":"Hydrobiologia"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"303","DOI":"10.1590\/S1982-21702016000200017","article-title":"Delineamento amostral em reservat\u00f3rios utilizando imagens Landsat-8\/OLI: Um estudo de caso no reservat\u00f3rio de Nova Avanhandava (Estado de S\u00e3o Paulo, Brasil)","volume":"22","author":"Rodrigues","year":"2016","journal-title":"Bol. Ci\u00eanc. Geod."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"7442","DOI":"10.1364\/AO.38.007442","article-title":"Estimation of the remote-sensing reflectance from above-surface measurements","volume":"38","author":"Mobley","year":"1999","journal-title":"Appl. Opt."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"26313","DOI":"10.1364\/OE.18.026313","article-title":"Removal of surface-reflected light for the measurement of remote-sensing reflectance from an above-surface platform","volume":"18","author":"Lee","year":"2010","journal-title":"Opt. Express"},{"key":"ref_30","unstructured":"Golterman, H.L., Clymo, R.S., and Ohnstad, M.A.M. (1978). Methods for Physical and Chemical Analysis of Fresh Water, Blackwell Scientific Publications."},{"key":"ref_31","unstructured":"American Public Health Association (APHA), American Water Works Association (AWWA), and Water Environment Federation (WEF) (1998). Standard Methods for the Examination of Water and Wastewater, APHA, AWWA, WEF. [20th ed.]."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"1358","DOI":"10.4319\/lo.1995.40.8.1358","article-title":"An alternative approach to absorption measurements of aquatic particles retained on filters","volume":"40","author":"Tassan","year":"1995","journal-title":"Limnol. Oceanogr."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"1699","DOI":"10.1093\/plankt\/20.9.1699","article-title":"Measurement of light absorption by aquatic particles retained on filters: Determination of the optical pathlength amplification by the \u2018transmittance-reflectance\u2019 method","volume":"20","author":"Tassan","year":"1998","journal-title":"J. Plankton Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"757","DOI":"10.1093\/plankt\/24.8.757","article-title":"A sensitivity analysis of the \u2018transmittance-reflectance\u2019 method for measuring light absorption by aquatic particles","volume":"24","author":"Tassan","year":"2002","journal-title":"J. Plankton Res."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"43","DOI":"10.4319\/lo.1981.26.1.0043","article-title":"Absorption by dissolved organic matter of the sea (yellow substance) in the UV and visible domains","volume":"26","author":"Bricaud","year":"1981","journal-title":"Limnol. Oceanogr."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"116","DOI":"10.1016\/j.rse.2011.11.013","article-title":"Review of constituent retrieval in optically deep and complex waters from satellite imagery","volume":"118","author":"Ordematt","year":"2012","journal-title":"Remote Sens. Environ."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1364\/AO.20.000177","article-title":"Optical properties of the clearest natural waters (200\u2013800 nm)","volume":"20","author":"Smith","year":"1981","journal-title":"Appl. Opt."},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"361","DOI":"10.1016\/j.rse.2003.10.013","article-title":"Absorption spectrum of phytoplankton pigments derived from hyperspectral remote-sensing reflectance","volume":"89","author":"Lee","year":"2004","journal-title":"Remote Sens. Environ."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"375","DOI":"10.1109\/TGRS.2013.2240462","article-title":"Bio-optical inversion in highly turbid and cyanobacteria-dominated waters","volume":"52","author":"Mishra","year":"2014","journal-title":"IEEE Trans. Geosci. Remote Sens."},{"key":"ref_40","unstructured":"Mobley, C.D., and Sundmann, L.K. (2013). Hydrolight 5.2 and Ecolight 5.2 User\u2019s Guide, Sequoia Scientific."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1016\/j.rse.2011.07.024","article-title":"The global monitoring for environment and security (GMES) Sentinel-3 mission","volume":"120","author":"Dolon","year":"2012","journal-title":"Remote Sens. Environ."},{"key":"ref_42","unstructured":"Weaver, E.C., and Wrigley, R. (1994). Factors Affecting the Identification of Phytoplankton Groups by Means of Remote Sensing, NASA, Ames Research Center."},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"237","DOI":"10.4319\/lo.2005.50.1.0237","article-title":"Remote sensing of the cyanobacterial pigment phycocyanin in turbid inland water","volume":"50","author":"Simis","year":"2005","journal-title":"Limnol. Oceanogr."},{"key":"ref_44","doi-asserted-by":"crossref","first-page":"517","DOI":"10.1080\/01431160600821127","article-title":"The MERIS Case 2 water algorithm","volume":"28","author":"Doerffer","year":"2007","journal-title":"Int. J. Remote Sens."},{"key":"ref_45","doi-asserted-by":"crossref","first-page":"887","DOI":"10.1016\/j.rse.2009.12.001","article-title":"A two-step optimization procedure for assessing water constituent concentrations by hyperspectral remote sensing techniques: An application to the highly turbid Venice lagoon waters","volume":"114","author":"Santini","year":"2010","journal-title":"Remote Sens. Environ."},{"key":"ref_46","unstructured":"Rodrigues, T.W.P. (2016). From Oligo to Eutrophic Inland Waters: Advancements and Challenges for Bio-Optical Modeling. [Ph.D. Thesis, Universidade Estadual Paulista]."},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"290","DOI":"10.1117\/12.21451","article-title":"In vivo absorption properties of algal pigments","volume":"1302","author":"Bidigare","year":"1990","journal-title":"Proc. SPIE"},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"761","DOI":"10.1080\/2150704X.2016.1185189","article-title":"An investigation into the phytoplankton package effect on the chlorophyll-a specific absorption coefficient in Barra Bonita reservoir, Brazil","volume":"7","author":"Watanabe","year":"2016","journal-title":"Remote Sens. Lett."}],"container-title":["Remote Sensing"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/2\/227\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T14:53:30Z","timestamp":1760194410000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2072-4292\/10\/2\/227"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2018,2,2]]},"references-count":48,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2018,2]]}},"alternative-id":["rs10020227"],"URL":"https:\/\/doi.org\/10.3390\/rs10020227","relation":{},"ISSN":["2072-4292"],"issn-type":[{"type":"electronic","value":"2072-4292"}],"subject":[],"published":{"date-parts":[[2018,2,2]]}}}