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以2006年、2011年、2014年春季椒江口水质监测资料为基础,运用富营养指数法、有机污染综合指数法和潜在性富营养化评价法,对近10 a来椒江口海域营养盐的时空分布变化特征和富营养化状况进行了研究分析。结果表明:近10 a来,椒江口海域表层水体DIN、DIP均劣于四类海水水质标准,海域水体呈严重污染状态,富营养化程度较高;从时间上看,DIN、DIP浓度和富营养化程度均呈先加重后减轻的趋势;从空间上看,椒江口海域表层水体的DIN、DIP以及E值、A值平面分布均呈由河口向外海逐渐递减的阶梯状分布。入海径流携带的污染物、周边大型用海工程是影响该海域水体营养盐浓度和富营养化程度的主要因素。
Based on the spring water monitoring data of Jiaojiang Estuary in 2006, 2011 and 2014, using the method of eutrophication index, comprehensive index of organic pollution and potential eutrophication evaluation method, the spatial and temporal distribution of nutrients in the Jiaojiang River estuary in the past 10 years Distribution and characteristics of eutrophication were analyzed. The results showed that DIN and DIP of surface water bodies in the Jiaojiang River estuary were both inferior to the four types of seawater quality standards in the past 10 years and the water bodies in the sea areas were seriously polluted and had a high degree of eutrophication. From the time point of view, DIN, DIP concentrations and rich From the spatial point of view, the DIN, DIP, E and A values of the surface waters in the Jiaojiang Estuary are all gradually decreasing from the estuary to the outer sea. The pollutants carried by sea into the sea and the large-scale sea-bordering projects around the sea are the main factors that affect the nutrient concentration and eutrophication in the waters.