莱州湾海域水质石油类的分布特征

根据2011年5月~2013年11月莱州湾海域表层海水中石油类污染状况进行的现场调查，研究分析了莱州湾表层海水中石油类的平面分布和季节变化特征。结果表明，2011~2013年，莱州湾表层海水中石油类的浓度变化范围分别为0.009~0.101mg/L、0.00875~0.0879mg/L和0.0118~0.0687mg/L，石油类含量总体年际变化不大，但2011年与2012年、2013年呈现不同的季节变化，2011年夏季（8月）高于春季（5月），而2012年~2013年表现为春季>夏季>秋季（5月 >8月 >10月 >11月）。从石油类的平面分布来看，基本呈现近岸高、湾中部及湾口低的特点，高值区主要集中在小清河口和黄河口等河口附近海域。

Distribution characteristics of petroleum hydrocarbons in seawater of Laizhou bay

The study analyzed the horizontal distribution and seasonal variation of petroleum hydrocarbons, based on the data collected from the investigation of concentrations of petroleum hydrocarbons in surface water of Laizhou bay from May 2011 to Nov. 2013. The results showed that the oil content in surface water of Laizhou bay were 0.00900~0.101mg/L, 0.00875~0.0879mg/L and 0.0118~0.0687mg/L.The overall interannual changes were not significant, but presented apparent seasonal variation. The oil concentration in summer was higher than spring in 2011,the average content had a trend of spring > summer > autumn. According to the spatial distribution, the values in coastal area were higher than the center and mouth of Laizhou bay. And the higher values appeared at Xiaoqing River estuary and Huanghe estuary.