5 Conclusion
The study based on the numerical changes of 10 water quality parameters
in three reservoirs in Chuzhou City from 2019 to 2021, analyzed the
drivers of water quality parameters in the reservoirs over time, and
comprehensively evaluated the key factors responsible for the occurrence
of eutrophication in the reservoirs and the reasons for the discrepancy
in the trophic status of the three reservoirs. The results show that the
water quality of all three reservoirs is polluted under the impact of
the natural environment and anthropogenic activities. According to the
TLI method, we concluded that the water quality parameters contributing
more to the occurrence of eutrophication were SD, TN, and TP. A
plausible explanation for this is that when a water body is enriched
with too many N and P nutrients, algae will rapidly multiply, forming
water blooms and blocking light penetration, leading to eutrophication.
The biased utilization of reservoir functions is the major factor
contributing to the differences in the trophic status of the three
reservoirs. Furthermore, eutrophication levels in the three reservoirs
never showed significant signs of abatement from 2019 to 2021.
Therefore, the study still needs a long time to analyze and evaluate the
eutrophication of Shahe Reservoir, Huanglishu Reservoir, and Chengxi
Reservoir in Chuzhou City, so as to propose a management plan for
improving the water quality and reducing the nutrient index, and to
ensure that the water quality of the reservoirs continues to be good.