有机农药HCH对胶州湾海域水质的影响——沉降过程

Effect of HCH on the Water Quality in the Jiaozhou Bay——Settling Process of HCH

根据1979-1984年(缺1980年)的胶州湾水域调查资料,分析了在胶州湾水域有机农药HCH的底层分布变化。结果表明:在胶州湾的底层水体中,底层分布具有以下特征:1)在春、夏、秋季,HCH的表、底层质量浓度都相近;2)在季节分布中,表层质量浓度低的,其对应的底层就较低;表层质量浓度高的,其对应的底层就高。而且HCH的底层质量浓度变化范围小于表层;3)在输入胶州湾水域中,HCH质量浓度的前锋内,表层与底层HCH的水平分布状况是一致的,而在HCH的前锋外,表层与底层HCH的水平分布状况是不一致的。因此,在胶州湾水域,HCH底层分布所具有的3个特征使我们通过HCH表层质量浓度变化就知道其底层质量浓度变化及分布状况。同时,通过HCH质量浓度的沉降过程,展示了HCH在时空变化中的迁移路径。

Variations of the distribution of the distribution of organic pesticide HCH in the bottom water of the Jiaozhou Bay were analyzed based on the surveys in this bay carried out from 1979 to 1984 but 1980.The results show that in the water of the Jiaozhou Bay,the distributions of HCH are characterized with:(1) the content of HCH in the surface water is close to that in the bottom water in spring,summer and autumn;(2) in the same season,the bottom water and and the surface water have a similar changing tendency in the content of HCH,but the range of the variation of the HCH content is smaller in the bottom water than in the surface water;(3) when HCH imports into the waters of the Jiaozhou Bay,is horizontal distrbution in the surface water is coincident with that in the bottom water within the front of HCH contents,whereas outside the front of HCH contents the situation is not conincident.As a result,from the variations of the distributions of HCH in the surface water we can know those in the bottom water.Also,the temporal and spatial migrations of HCH can be indicated by the settling process of HCH.