Abstract
The presence of cyanobacteria blooms is an intuitive visual indicator of the eutrophication levels in lakes. It is of great importance to precisely assess the extent, coverage, location and other pertinent details of algal blooms and to monitor the eutrophication degree of water in real time, which is essential for ecological restoration and human life quality protection. Using MODIS Aqua satellite image as the primary data source, in the dataset we eliminated the influence of cloud, flare, aquatic vegetation, high turbidity water and other potential factors of interference in the extraction of algal blooms, calculated the algal bloom coverage at the individual pixel level, and finally obtained the data algal blooms in Hulun Lake spanning 19 years, from 2003 to 2021. The accuracy verification process generally met the stipulated requirements. The format of this dataset is * tif, which is compatible with GIS professional software for reading and editing. The dataset can provide data reference for professionals in the field, offering valuable data support for the ecological environment monitoring of Hulun Lake.
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