MPI在杭州湾北岸海洋环境质量评价中应用

Assessment on Marine Environmental Quality North Bank of Hangzhou Bay by MPI

采用大型底栖动物污染指数对2014年杭州湾北岸海洋功能区大型底栖动物相关参数进行分析,探讨了该区海洋功能区环境质量的现状和变化趋势。结果表明:2014年杭州湾北岸海洋功能区环境质量总体较差,6个站位环境质量均为严重污染,MPI值从小到大依次为hy03、hy01、by02、PH01、PH06和PH04站位;同时,参考邻近海域的水质状况表明,各功能区的MPI值的季节变动较大,但环境质量均为严重污染,环境质量的季节变化规律不明显。杭州湾属于强潮型河口湾,潮流的冲刷作用使底质处于不稳定状态,加之人类活动对底栖生物的生存环境的破坏逐年加剧,致使其生存空间减少,导致杭州湾北岸海洋功能区环境质量恶化,生态环境承受较大的威胁。

Macrozoobenthos Pollution Index（MPI） was in this paper used to assess the environmental quality of the zone. Based on the marine environmental monitoring macrofaunal data at the north bank of Hangzhou Bay function zone in 2014, 6 sections respectively were set in different function zones. Generally, the result showed that the environmental quality in the study area was poor. All the 6 sections were polluted seriously, the MPI value followed in descending order was hy03, by01, by02, PH01, PH06 and PH04. Seasonal change of environmental quality in each section of marine function areas was large. Compared with the water quality changes of sea area adjacent to the function zones, the seasonal change law was insignificant. The strong tidal current action in Hangzhou Bay, as well as the sea reclamation projects was serious year by year caused the decline of ecological environmental quality and living space in this zone. While, it was also becoming more of an environmental risk in different fimction areas.