椒江河口生态环境质量评价

Assessment on the Situation of Ecological Environment Quality in Jiaojiang Estuary

根据2003年8月调查资料,对椒江河口的生态环境质量进行评价。结果表明:椒江河口水体的DIN、DIP、Hg、Pb、DO、COD等6项属重污染,水体富营养化指数0.67￣1237,均值288;表层沉积物的单项标准指数均小于1;河口水域底栖生物种类6种,多样性指数H'为0～1.92;潮间带共鉴定大型潮间带生物38种,H'为1.03～2.40之间,种类多样性差,丰度低,个体分布不均匀,生态环境脆弱。

Based on the data surveyed in August 2003, the assessment on the situation of ecological environment quality in Jiaojiang Estuary was done. The result showed that the serious pollutants were DIN, DIP, Hg, Pb, Do and COD in seawater. The eutrophication index of water was from 0.67 to 1237 with an average of 288. All of the simple index of sediment in the surface layer was lower than 1.In the sea area and the intertidal zone of Jiaojiang Estuary respectively, 6 and 38 species of benthonic biology were identified respectively with Diversity Index of Biocommunity （H＇） were from 0 to 1.92 and from 1.03 to 2.40 respectively. The ecology of Jiaojiang Estuary was frangible because the distributing of the biology individual was not uniform and both biology species and biomass was low.