{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,25]],"date-time":"2026-07-25T02:07:23Z","timestamp":1784945243869,"version":"3.55.0"},"reference-count":61,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T00:00:00Z","timestamp":1705017600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry (IPET)","award":["320049-5"],"award-info":[{"award-number":["320049-5"]}]},{"name":"Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, and Forestry (IPET)","award":["2022003610002"],"award-info":[{"award-number":["2022003610002"]}]},{"name":"ministry of Agriculture, Food and Rural Affairs (MAFRA)","award":["320049-5"],"award-info":[{"award-number":["320049-5"]}]},{"name":"ministry of Agriculture, Food and Rural Affairs (MAFRA)","award":["2022003610002"],"award-info":[{"award-number":["2022003610002"]}]},{"name":"Korea Environmental Industry and Technology Institute (KEITI)","award":["320049-5"],"award-info":[{"award-number":["320049-5"]}]},{"name":"Korea Environmental Industry and Technology Institute (KEITI)","award":["2022003610002"],"award-info":[{"award-number":["2022003610002"]}]},{"name":"Korea Ministry of Environment (MOE)","award":["320049-5"],"award-info":[{"award-number":["320049-5"]}]},{"name":"Korea Ministry of Environment (MOE)","award":["2022003610002"],"award-info":[{"award-number":["2022003610002"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>Small-scale reservoirs located in river estuaries are a significant water resource supporting agricultural and industrial activities; however, they face annual challenges of eutrophication and algal bloom occurrences due to excessive nutrient accumulation and watershed characteristics. Efficient management of algal blooms necessitates a comprehensive analysis of their spatiotemporal distribution characteristics. Therefore, this study aims to develop a chlorophyll-a (Chl-a) estimation model based on high-resolution satellite remote sensing data from Sentinel-2 multispectral sensors and multiple linear regression. The multiple linear regression (MLR) models were constructed using multiple reflectance-based variables that were collected over 2 years (2021\u20132022) in an estuarine reservoir. A total of 21 significant input variables were selected by backward elimination from the 2\u20134 band algorithms as employed in previous Chl-a estimation studies, along with the Sentinel-2 B1-B8A wavelength ratio. The developed algorithm exhibited a coefficient of determination of 0.65. Spatiotemporal variations in Chl-a concentration generated by the algorithm reflected the movement of high Chl-a concentration zones within the body of water. Through this analysis, it turned out that Sentinel-2-based spectral images were applicable to a small-scale reservoir which is relatively long and narrow, and the algorithm estimated changes in concentration levels over the seasons, revealing the dynamic nature of Chl-a distributions. The model developed in this study is expected to support effective algal bloom management and water quality improvement in a small-scale reservoir or similar complex water quality water bodies.<\/jats:p>","DOI":"10.3390\/rs16020315","type":"journal-article","created":{"date-parts":[[2024,1,12]],"date-time":"2024-01-12T07:47:16Z","timestamp":1705045636000},"page":"315","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":32,"title":["Evaluation of Sentinel-2 Based Chlorophyll-a Estimation in a Small-Scale Reservoir: Assessing Accuracy and Availability"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0949-4735","authenticated-orcid":false,"given":"Wonjin","family":"Jang","sequence":"first","affiliation":[{"name":"Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7815-3400","authenticated-orcid":false,"given":"Jinuk","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Civil, Environmental and Plant Engineering, Graduate School, Konkuk University, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin Hwi","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Civil and Environmental and Plant Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5380-5078","authenticated-orcid":false,"given":"Jae-Ki","family":"Shin","sequence":"additional","affiliation":[{"name":"Limnoecological Science Research Institute Korea THE HANGANG, Miryang 50440, Gyeongnam, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2151-5209","authenticated-orcid":false,"given":"Kangmin","family":"Chon","sequence":"additional","affiliation":[{"name":"Department of Environmental Engineering, College of Engineering, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea"},{"name":"Department of Integrated Energy and Infra System, Kangwon National University, Chuncheon 24341, Gangwon-do, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Eue Tae","family":"Kang","sequence":"additional","affiliation":[{"name":"Rural Research Institute, Korea Rural Community Corporation, Ansan-si 15634, Gyeonggi-do, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1959-0843","authenticated-orcid":false,"given":"Yongeun","family":"Park","sequence":"additional","affiliation":[{"name":"Division of Civil and Environmental and Plant Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9729-9373","authenticated-orcid":false,"given":"Seongjoon","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Civil and Environmental and Plant Engineering, College of Engineering, Konkuk University, Seoul 05029, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,1,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1072","DOI":"10.1039\/b920235h","article-title":"Factors dominating stratification cycle and seasonal water quality variation in a Korean estuarine reservoir","volume":"12","author":"Lee","year":"2010","journal-title":"J. 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