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基于2013年9月辽东湾北部海区的水质监测资料,以化学需氧量(COD)、溶解氧(DO)、总无机氮(DIN)和活性磷酸盐为海水富营养程度评价指标,以污染因子贡献率与层次分析法求得综合权重,应用模糊综合评判模型评价该海域的海水富营养化情况,分析了影响海水富营养化的指标以及具体的影响因素。结果表明:辽东湾北部海区近海地区属于重度富营养程度,而越往远岸海区则海水富营养有所减轻。影响辽东湾北部海区的主要影响因子为无机氮;辽东湾北部海区富营养化程度主要受沿岸河流注入与海水养殖业的影响。
Based on the water quality monitoring data of the northern part of Liaodong Bay in September 2013, COD, DO, DIN and AP were used to evaluate the eutrophication degree of seawater. The pollution factors The contribution rate and the analytic hierarchy process are used to obtain the comprehensive weight, and the fuzzy comprehensive evaluation model is used to evaluate the seawater eutrophication in the sea area. The indexes affecting seawater eutrophication and the specific influencing factors are also analyzed. The results showed that the coastal areas in the northern part of Liaodong Bay belonged to severe degree of eutrophication while the more eutrophication of seawater in the far offshore area was alleviated. The main influencing factor affecting the northern part of Liaodong Bay is inorganic nitrogen. The eutrophication in the northern part of Liaodong Bay is mainly affected by the river inflow and mariculture.