Abstract
According to the monitoring data of five cruises in Laizhou Bay from 2013 to 2018, the content, pollution status and spatial distribution characteristics of petroleum hydrocarbons in the surface sediments were analyzed. The results showed that the content range of petroleum hydrocarbons in the sediments was from 0.00~ 377.00 mg / kg, with an average of 63.34 mg/kg, which indicated that the pollution extent was light. The obtained monitoring data were analyzed through DPS18.10 software and PRIMER 7 software. The analysis results showed that the spatial dispersion extent of inter-annual petroleum hydrocarbon content at the monitoring stations was high, the difference was not significant, the clustering similarity was low, and the grouping was not obvious. The results showed that the spatial distribution trend of petroleum hydrocarbon contents in the sediments was uniform, and there were high value areas in some areas.The spatial distribution of petroleum hydrocarbons in Laizhou Bay was dominated by the distribution of ports and the input of human activities. The inter-annual variation of petroleum hydrocarbon contents in the sediments was not obvious. The area where the decrease or increase of petroleum hydrocarbon content in each monitoring station was obvious, was in the SW-NE direction.
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