Analysis of eutrophication degree changes and discussion on algaebloom control in the Ha-suhai from 2012 to 2023
The water quality characteristics(permanganate index,chemical oxygen demand,five-day biochemi-cal oxygen demand,total nitrogen,ammonia nitrogen,total phosphorus and chlorophyll a)of the 2023 Hasuhai from 2012 to 2023 were analyzed in the paper.The results showed that total phosphorus and chlorophyll a were increasing,and the other water quality indexes of Hasuhai were stable and fluctuating.The degree of eutrophication was evaluated by the indicators of algal blooms characteristics(permanganate index,total nitrogen,ammonia nitrogen,total phospho-rus and chlorophyll a)during july-august(flood season).The results showed that the water quality indexes of Hasuhai were stable in general,and the algal bloom indexes were slight eutrophication,but moderate eutrophication in some years.The analysis of the main influencing factors would help to improved the pertinence of Pollution Control and wa-ter bloom control in Hasuhai and maintain a good ecological environment.
HasuhaiWater quality analysisEutrophicationWater bloom control
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