Keywords
Bản đồ
Phú dưỡng
Hồ Tây
Sentinel-2 Technical framework
Mapping
Eutrophication
West Lake
Sentinel 2
Working Languages
How to Cite
Abstract
This study outlines the technical framework for creating a lake trophic state map using Sentinel-2 Level 2 satellite images. The framework is proposed based on current regulations and insights from previous studies on mapping natural resources using satellite imagery. By applying remote sensing and GIS technology, this process was validated in West Lake using Sentinel-2 imagery captured on December 19th, 2022. The results show that with TSI values ranging from 50 to 90 obtained from the images, West Lake is experiencing a eutrophic to hypereutrophic state. The spatial differences in trophic levels are clearly depicted on the resulting map, with approximately 95% of the lake's surface area in a eutrophic state (50 < TSI < 70) and hypereutrophic waters mainly concentrated along the lake's western shore.