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Exploration of factors of algal seasonal blooms in a drinking water source

ailan yan , Feilai Qian, Yande Li, Dongsheng Qian, Yongfei Chen, Dong Xu

Abstract

Context: The emergence of cyanobacterial blooms has garnered international concern es-pecially during seasonal transitions. Aims: The objective of this study is to investigate the primary correlation factors contributing to algal blooms through an examination of the rela-tion-ship between nutrient distribution and seasonal algae growth, specifically in the con-text of low nitrogen and phosphorus levels in the source of drinking water. Methods: By monitoring water quality indicators over a six-month period, including total nitrogen, total phosphorus, ammonia nitrogen, water temperature, pH value, and phytoplankton content, the dynamic trend of algal growth was evaluated, and the primary factors contributing to algal outbreaks were analyzed. Key Results: The findings indicate a significant correlation between algae blooms and elevated water temperature and light intensity in Shuangxikou Reservoir. As light intensity and water temperature increased, there was a shift in dominant algae species from Bacillariophyta to cyanobacteria. Conclusions: Algal biomass was pri-marily concentrated at depths between 0 and 4 meters, leading to a higher pH value in this specific water area compared to other area along the vertical axis as a result of the algal outbreak. Implications: This study makes a substantial contribution to the identification of safe methods for managing seasonal algae growth.

MF24019  Accepted 10 November 2024

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