中文摘要：

根据2011年9月和2013年8月在柘林湾11各位点采样调查,以化学需氧量（COD）、总氮（TN）、总磷（TP）、叶绿素a（Chla）和溶解氧（DO）为评价指标,采用隶属度模糊综合法对柘林湾海域海水富营养化水平进行评价,并与营养状态质量指数法（NQI）评价结果比较。研究表明,柘林湾西北部海域COD、TN和TP浓度较高,DO浓度较低;2011年COD、TN和Chla在各位点浓度较2013年高。海域各位点2011年全部处于富营养化水平,2013年部分位点营养水平降低。据隶属度权重分析,柘林湾海水富营养化形成主要因素是TN、TP和DO。隶属度模糊综合法对柘林湾海域营养水平评价结果与NQI基本一致。柘林湾海水富营养化主要是由养殖污染、陆源输入污染和航运污染造成,且后二者影响有逐渐增加趋势。

英文摘要：

Surface sediments from eleven sites were collected from Zhelin Bay in September 2011 and August 2013,and COD,TN,TP,Chla and DO were chosen as the assessment indicators. Fuzzy comprehensive assessment（FCA） were applied to evaluating the nutrient status of seawater samples in Zhelin Bay,and compared with that by nutritional status quality index（NQI）. The results showed that the concentrations of COD,TN and TP in the northwest areas of Zhelin Bay were higher than other areas,whereas the contrary distribution for DO concentrations was observed;and the concentrations of COD,TN and Chla in the samples of 2011 were higher than those of 2013. All of the sampling sites were at the level of eutrophication in 2011 according to FCA;and the eutrophication levels of some sites decreased in 2013. Based on the weight of assessment parameters,the primary factors of eutrophication formation were TN,TP and DO. The assessment results of FCA and NQI were generally consistent. The eutrophication of Zhelin Bay mainly resulted from the pollution of land-based source and shipping transport,and then mariculture pollution.