汕尾电厂临时倾倒区对所在海域及其周边环境的影响

分析汕尾电厂临时倾倒区2006年倾倒的疏浚泥对所在海域水质、沉积物、生物群落及生物质量等的影响。结果表明,在倾倒过程中,海水中悬浮物、石油类的含量增加,属第三类海水水质;倾倒活动改变了生物群落的水环境,使群落种数减少,多样性、均匀度和丰度降低。倾倒活动结束1个月后,除海水中悬浮物的含量仍属第三类海水水质外,其他污染物含量均符合第二类海水水质标准,底栖生物恢复较缓慢。疏浚泥倾倒对海区沉积物质量和海洋生物质量的影响较小。

Impact of Temporary Dumping Ground of Shanwei Power Plant on the Sea Area and Its Surroundings

The paper analyzed the impact of the dredged spoils dumped at temporary dumping ground from Shanwei Power Plant in 2006 on the seawater quality,sediments,biological communities,biological quality and ect.The results showed that the standard of seawater belonged to the Ⅲ-level,which resulted from the increased suspended solids and oil content in sea water in the dumping process.The dumping altered the water environment of biological communities,which resulted in the decrease of species,diversity,evenness and abundance.A month after dumping,the other contaminants measured up to the II-level seawater standard,with the exception of the content of suspended matter in seawater which belonged to Ⅲ-level seawater standard.But the benthos recovered slowly.The impact of dumping dredged mud on sediment quality and marine life quality was slight.