东山湾海域表层海水油类污染分布特征分析

Distribution character of oil in the surface water of Dongshan Bay

根据2009—2011年东山湾海域表层海水油类含量的调查结果,分析该海域油类污染的分布特征,采用单项指数法评估调查海域的油污染程度。结果显示,东山湾海域油类的测值和平均值均符合国家一类海水水质标准。就各季油类平均含量高低相对比较而言,秋季>冬季>夏季>春季,但是年际间油含量无明显变化。从空间区域变化趋势看,东山岛东北部海域及塔屿北部和古雷汕尾至古雷头西侧海域海水污染最为严重,而古雷半岛中西部和湾顶至湾中部海域海水含量较低。

According to the investigational data of oil content to 2011, the distribution character and pollution degree of oil in the surface water of Dongshan Bay from 2009 in the investigational sea area were studied with single index method. Results showed that the measured values and the average values of oil content were below the standard values of first national seawater quality, and seawater quality all met the national standards. In terms of seasonal oil content, the sequence was autumn 〉 winter 〉 summer 〉 spring, but no obvious change by years ; in terms of region oil content, the adjacent water of the northern part of Dongshan Island and Tayu and the western part between Gulei Cape and Shanwei were most seriousty polluted, but the water between the mid -west part and forepart was the lowest.