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对2007年~2011年北戴河赤潮监控区的营养盐时空分布、结构变化以及富营养化状况进行了分析和评价,结果表明:近五年来无机氮含量呈现出升高趋势;陆地径流输入是该海域营养盐的主要来源,河口附近海域各项营养盐浓度最高,随离岸距离的增加各营养盐浓度逐渐降低;近5年来该海域氧化性环境有加强的趋势,硝酸盐占无机氮的比重总体呈增大趋势,氨盐占无机氮的比重总体呈减小趋势;2009年至2011年该海城潜在限制性营养盐为活性磷酸盐;近年来该海域由贫营养状态逐渐演变为中营养状态。
The spatial and temporal distribution of nutrients, structure changes and eutrophication in the monitoring area of Red tide in Beidaihe River from 2007 to 2011 were analyzed and evaluated. The results showed that the content of inorganic nitrogen showed an increasing trend in the past 5 years; The main source of nutrients, the highest concentrations of nutrients in the estuary near the estuary, with the increasing distance from the shore of each nutrient concentration gradually decreased; in the past 5 years the oxidizing environment in the sea there is a tendency to strengthen the proportion of nitrate in total inorganic nitrogen The proportion of ammonia nitrogen to inorganic nitrogen generally decreased; the potential limiting nutrient of Haicheng was active phosphate from 2009 to 2011; in recent years, the sea area gradually changed from the state of poor nutrition to the state of medium nutrition .