江苏近岸海域富营养化特征研究

近年来，江苏近岸海域水质不佳，赤潮、绿潮等生态灾害屡屡发生，富营养化是其潜在原因之一。本文对该海域2019年和2020年春、夏、秋季航次监测的无机氮（DIN）、活性磷酸盐（SRP）、叶绿素a（Chl a）等水质参数进行了空间分析，采用指数评价法量化了该海域的富营养化程度，并基于统计分析研究了该海域的富营养化特征。结果表...

Eutrophication characteristics in the Jiangsu coastal waters

In recent years, water quality degradation in the Jiangsu coastal waters has led to frequent harmful algal blooms known as the red and green tides. Eutrophication is considered as one of the potential causes. In order to study eutrophication characteristics in this region, the monitored water quality parameters such as dissolved inorganic nitrogen (DIN), soluble reactive phosphorus (SRP), and chlorophyll a in 2019 and 2020 were analyzed spatially and integrated as various eutrophication indices. Results indicate that DIN and SRP concentrations in the Jiangsu coastal waters were relatively high nearshore and significantly negatively correlated with salinity. Due to higher precipitation and river runoff, nutrient and chlorophyll a concentrations were higher in summer than in spring and fall, and in the wet (2020) than normal (2019) year. Based on these findings, we conclude that the terrestrial input likely exerts a major control on eutrophication of the Jiangsu coastal sea. Monitoring and load management of the riverine pollution are key to water quality improvement in this region.