威海双岛湾海域营养盐特征、限制性分析与评价

发布时间：2018-05-16 07:16

本文选题：双岛湾 + 营养盐　；参考：《科学技术与工程》2016年25期

【摘要】：根据2015年6月对威海双岛湾的海洋生态环境调查资料,分析了DIN、PO_4-P和COD的特征及限制性因子。综合运用单因子指数、水体富营养化指数和有机污染状况评价等方法对该海域富营养化程度进行了评价。结果显示:NO_3-N为DIN的主要存在形式,DIN为双岛湾的主要污染因子,DIN、PO_4-P和COD平均浓度为164.99μg/L、4.51μg/L和0.93 mg/L。除部分站位DIN外,其余站位DIN、PO_4-P及COD浓度均符合一类海水水质标准。营养盐及COD浓度平面分布总体呈现南高北低,湾内高于湾外趋势。N/P均值为83.04,营养结构特征为磷限制。对比历史数据,双岛湾N/P失衡呈逐年加剧趋势。富营养化指数均值为0.16,海水有机污染指数变化区间为-0.62~1.02,与富营养化指数法相比,海水有机污染指数法结论更为客观。
[Abstract]:Based on the survey data of marine ecological environment in Shuangdao Bay of Weihai in June 2015, the characteristics and restrictive factors of DINPPO4-P and COD were analyzed. The eutrophication degree of the sea area was evaluated by means of single factor index, eutrophication index and organic pollution. The results show that the average concentration of DINPO4-P and COD are 164.99 渭 g / L and 4.51 渭 g / L and 0.93 mg / L respectively. The concentrations of DINPPO4-P and COD in the rest of the stations, except for some of the DIN stations, were in accordance with the first class standard of seawater quality. The distribution of nutrient and COD concentrations was generally high in the south and low in the north. The mean value of N / P in the bay was 83.04, and the nutrient structure was limited by phosphorus. Compared with the historical data, the N / P imbalance in the double Island Bay is increasing year by year. The mean value of eutrophication index is 0.16, and the variation range of seawater organic pollution index is -0.62n1.02. Compared with the eutrophication index method, the conclusion of seawater organic pollution index method is more objective.
【作者单位】：山东省海洋资源与环境研究院山东省海洋环境监测中心山东省海洋生态修复重点实验室;
【基金】：海洋公益性行业科研专项(201205023) 国家自然科学基金青年项目(41206120)资助
【分类号】：X824;X55

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