ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA
The mission of the European Space Agency’s Sentinel-3 satellite is to provide data for land and ocean monitoring purposes. Sentinel- 3’s Ocean and Land Colour Instrument (OLCI) data are being used largely for monitoring offshore and coastal waters but can also be used for inland waters including lak...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2019-12-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-4-W19/125/2019/isprs-archives-XLII-4-W19-125-2019.pdf |
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| author | M. Conopio R. K. Japor A. C. Blanco A. C. Blanco A. M. Tamondong A. M. Tamondong |
| author_facet | M. Conopio R. K. Japor A. C. Blanco A. C. Blanco A. M. Tamondong A. M. Tamondong |
| author_sort | M. Conopio |
| collection | DOAJ |
| description | The mission of the European Space Agency’s Sentinel-3 satellite is to provide data for land and ocean monitoring purposes. Sentinel- 3’s Ocean and Land Colour Instrument (OLCI) data are being used largely for monitoring offshore and coastal waters but can also be used for inland waters including lakes. It has a spatial resolution of 300 meters, a temporal resolution of 2–3 days and contains 21 spectral bands. Laguna de Bay, with a surface area of around 930 km<sup>2</sup>, suffers from periodic algal blooms resulting from excessive nutrient inputs from surrounding watersheds. This study aims to assess the applicability of Sentinel-3 OLCI for estimating chlorophylla (chl-a) concentration in Laguna Lake. Several chl-a estimation algorithms (i.e., band ratios and indices) were tested for Sentinel 3 OLCI images and compared with in-situ data obtained using a chl-a sensor. A regression model comprising of individual spectral bands, band ratios, and band indices for chl-a estimation as independent variables was developed, yielding an adjusted R<sup>2</sup> of 0.759 and RMSE of 1.19 ug/L. The model consists of R620, R674/R708, and RED/NIR. A map was produced showing the spatial distribution of chl-a in Laguna Lake, with most of the portion of the lake having a concentration ranging from 7.5 ug/L to 15 ug/L. This shows that Sentinel 3 OLCI images can be utilized for accurately estimating chl-a in Laguna Lake. |
| first_indexed | 2024-12-21T12:21:55Z |
| format | Article |
| id | doaj.art-e9c5014d875749a2a3887c54f08f433b |
| institution | Directory Open Access Journal |
| issn | 1682-1750 2194-9034 |
| language | English |
| last_indexed | 2024-12-21T12:21:55Z |
| publishDate | 2019-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj.art-e9c5014d875749a2a3887c54f08f433b2022-12-21T19:04:18ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342019-12-01XLII-4-W1912513210.5194/isprs-archives-XLII-4-W19-125-2019ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATAM. Conopio0R. K. Japor1A. C. Blanco2A. C. Blanco3A. M. Tamondong4A. M. Tamondong5Department of Geodetic Engineering, University of the Philippines – Diliman, Quezon City 1101, PhilippinesDepartment of Geodetic Engineering, University of the Philippines – Diliman, Quezon City 1101, PhilippinesDepartment of Geodetic Engineering, University of the Philippines – Diliman, Quezon City 1101, PhilippinesTraining Center for Applied Geodesy and Photogrammetry, University of the Philippines – Diliman, Quezon City 1101, PhilippinesDepartment of Geodetic Engineering, University of the Philippines – Diliman, Quezon City 1101, PhilippinesTraining Center for Applied Geodesy and Photogrammetry, University of the Philippines – Diliman, Quezon City 1101, PhilippinesThe mission of the European Space Agency’s Sentinel-3 satellite is to provide data for land and ocean monitoring purposes. Sentinel- 3’s Ocean and Land Colour Instrument (OLCI) data are being used largely for monitoring offshore and coastal waters but can also be used for inland waters including lakes. It has a spatial resolution of 300 meters, a temporal resolution of 2–3 days and contains 21 spectral bands. Laguna de Bay, with a surface area of around 930 km<sup>2</sup>, suffers from periodic algal blooms resulting from excessive nutrient inputs from surrounding watersheds. This study aims to assess the applicability of Sentinel-3 OLCI for estimating chlorophylla (chl-a) concentration in Laguna Lake. Several chl-a estimation algorithms (i.e., band ratios and indices) were tested for Sentinel 3 OLCI images and compared with in-situ data obtained using a chl-a sensor. A regression model comprising of individual spectral bands, band ratios, and band indices for chl-a estimation as independent variables was developed, yielding an adjusted R<sup>2</sup> of 0.759 and RMSE of 1.19 ug/L. The model consists of R620, R674/R708, and RED/NIR. A map was produced showing the spatial distribution of chl-a in Laguna Lake, with most of the portion of the lake having a concentration ranging from 7.5 ug/L to 15 ug/L. This shows that Sentinel 3 OLCI images can be utilized for accurately estimating chl-a in Laguna Lake.https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-4-W19/125/2019/isprs-archives-XLII-4-W19-125-2019.pdf |
| spellingShingle | M. Conopio R. K. Japor A. C. Blanco A. C. Blanco A. M. Tamondong A. M. Tamondong ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA |
| title_full | ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA |
| title_fullStr | ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA |
| title_full_unstemmed | ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA |
| title_short | ESTIMATION OF CHLOROPHYLL-A CONCENTRATION IN LAGUNA DE BAY USING SENTINEL-3 SATELLITE DATA |
| title_sort | estimation of chlorophyll a concentration in laguna de bay using sentinel 3 satellite data |
| url | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-4-W19/125/2019/isprs-archives-XLII-4-W19-125-2019.pdf |
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