The study focused on improving the alert system for algal blooms in the Daecheong Reservoir in Korea. Harmful cyanobacteria can cause problems like bad taste and odor in the water. The Ministry of Environment has been using an alert system since 1998, but it needs to be updated to better fit the characteristics of the reservoir. The researchers aimed to find new ways to improve the alert system for different areas of the reservoir based on the types of harmful cyanobacteria present.