2016-2022年资阳市老鹰水库富营养化变化趋势分析

Analysis of Eutrophication Changes in the Laoying Reservoir in Ziyang City from 2016 to 2022

本文以老鹰水库为研究对象,基于综合营养状态指数法对老鹰水库2016—2022年的水质与水体富营养化程度进行评价,结合老鹰水库的实际情况,从外源输入与内源污染两方面对水质与水体富营养化成因进行分析。结果表明,2016—2022年老鹰水库年均综合营养状态指数在50上下波动,虽整体呈下降趋势,但是均处于污染或者污染临界线,水质达标形势比较严峻;现阶段老鹰水库污染以氮、磷污染为主,控制上游输入型污染、严控面源污染、提高补给水源水质是改善老鹰水库水质的重要举措。

This article focuses on the Laoying Reservoir and assesses its water quality and eutrophication levels from 2016 to 2022 using the Comprehensive Nutrient State Index method.Taking the actual conditions of the Eagle Reservoir into account,it conducts an analysis of the causes of water quality and eutrophication,considering both external inputs and internal pollution factors.The results indicate that from 2016 to 2022,the annual average Comprehensive Nutrient State Index for the Laoying Reservoir fluctuated around 50.Although there is an overall decreasing trend,the water quality remains in a polluted or near-polluted state,posing a significant challenge for achieving water quality standards.Currently,nitrogen and phosphorus pollution are the primary concerns,and addressing upstream pollution sources,controlling nonpoint source pollution,and improving the quality of water supply sources are crucial measures for improving the water quality of the Eagle Reservoir.