浙江省近岸海域表层沉积物环境质量的灰色聚类分区

Grey cluster of environmental quality in surficial sediment of Zhejiang Offshore

以浙江省近岸海域表层沉积物为研究对象,7种痕量金属元素为综合评价指标,运用灰色聚类法对浙江近岸海域表层沉积物环境质量进行评价分区。结果表明,浙江近岸海域表层沉积物环境质量分为四个区,即清洁区、起始污染区、轻污染区和中度污染区。轻污染区和中度污染区主要分布于象山港、台州湾-隘顽湾、温州湾至苍南一带,三门湾也有零星分布;起始污染区主要分布于浙江省北部的三门湾、象山沿海等海域,杭州湾也有零星分布;清洁区分布于杭州湾海域。

Based on the surficial sediments from the Zhejiang offshore and the comprehensive assessment factors of seven trace metals, the assessment of environmental quality in the surficial sediments was made using the grey clustering. The results showed that there were four pollution levels in the Zhejiang offshore - the clean, affected, light pollution and moderate pollution. The most parts in the sea area were light pollution and moderate pollution. The Sanmen, Taizhou, Leqing, Wenzhou Bay and Rui＇an coast were the greatest level of trace metals, were the moderate pollution, and the weight of Hg and Cr in the moderate pollution ; In the Hangzhou Bay, the degree of pollution of trace metals is very low, its environment was clean.