Using Sentinel-2B Imagery to Estimate the Eutrophication Level of Linh Dam Lake, Hoang Mai District, Hanoi

Nguyen Thuy Linh, Pham Thi Huong Thao, Luong Thi Phuong, Vu Thi Han, Nguyen Thi Thu Ha, Pham Quang Vinh

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Published Dec 17, 2019
DOI: https://doi.org/10.25073/2588-1094/vnuees.4471

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THUY LINH, Nguyen et al. Using Sentinel-2B Imagery to Estimate the Eutrophication Level of Linh Dam Lake, Hoang Mai District, Hanoi. VNU Journal of Science: Earth and Environmental Sciences, [S.l.], v. 35, n. 4, dec. 2019. ISSN 2588-1094. Available at: <https://js.vnu.edu.vn/EES/article/view/4471>. Date accessed: 21 nov. 2024. doi: https://doi.org/10.25073/2588-1094/vnuees.4471.
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Vol 35 No 4
Section
Original Articles

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Abstract

The successfully launched of Sentinel-2B (S2B) satellite into orbit created the recording frequency on Earth every 5 days with the simulated operating of Sentinel 2A satellite, and provided a high resolution (10m). This study aims to assess the effective application of S2B satellite on water environmental monitoring by using Secchi Disk Depth (SD) and surface water reflectance data, which was collected at the same time of the acquiring local scenes from S2B to establish SD estimated equation of Lake Linh Dam. Result showed that an accurate estimation model for SD in Lake Linh Dam by an exponential function of band 3 versus band 4 ratio (R2 = 0.86, RMSE=1.7). Resultant maps of SD distribution over the lake in 2018 and 2019 show that the water quality in Lake Linh Dam reached from the high eutrophication to super eutrophication level. This result is consistent with previous studies on eutrophication state of Lake Linh Dam, confirming the potential application of S2B image for water quality research in Hanoi lakes.


 

Keywords: Lake Linh Dam, eutrophication, TSI, secchi depth, Sentinel-2B.

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