摘要
根据1982年的胶州湾水域调查资料,分析了有机农药HCH在胶州湾水域的分布、污染源和季节变化。结果表明,胶州湾水域在4月、6月、7月和10月,HCH的污染较轻。在胶州湾水域,4月、6月和7月,HCH的含量变化由近岸向湾中心有梯度形成:从大到小呈下降趋势,10月HCH的梯度变化刚好相反。表层HCH的水平分布状况与底层HCH的水平分布状况一致。HCH含量变化展示HCH通过河流输入近岸水域要比通过地表径流直接输入近岸水域的质量浓度要高。因此,胶州湾水域HCH含量变化证明了HCH的陆地迁移过程。这表明在夏季,输入的胶州湾水域HCH的含量与春季相比,相对较高;HCH表、底层含量变化在时间尺度和空间尺度上证明了HCH的水域迁移过程。这揭示了HCH的表层含量高,通过沉降,HCH的底层含量就高。根据表、底层的HCH含量变化,提出了HCH的水体效应、稀释效应和累积效应,并用模型框图,表明了HCH穿过水体的含量变化,定量描述水体对HCH的作用。
Based on the investigation data from the Jiazhou Bay in 1982, the HCH distribution, its source, and the seasonal variation are analyzed. As the results show, HCH pollution are less in April, June, July, and October. HCH content has a gradient and decreases from the near-shore to the middle of the bay in April, June, and July. The gradient becomes reversed in October. The HCH horizontal distribution in the surface layer is similar to that in the bottom layer. The HCH content variability shows that HCH content in the near-shore sea area into which rivers flow is higher than in the sea area into which the land surface runoffs flow. The HCH displacement process on the land can be proved in light of the HCH variability in the sea area of the bay, and it shows that the HCH content carried into the bay is higher in summer than in spring. Also the HCH displacement process in the sea area can be proved in light of the HCH content temporal-spatial variability in the surface layer and the bottom layer, and it shows that the bottom layer HCH content is high because of the subsidence where the surface layer one is high. Based on the HCH content variabilities in the surface layer and the bottom layer, the water effect, the dilution effect, and the accumulation effect on HCH are proposed. A schematic plot is drawn to show the HCH content variability in the subsiding process and to quantitatively describe the water effect on HCH.
出处
《海岸工程》
2009年第4期69-78,共10页
Coastal Engineering
基金
国家海洋局海洋溢油鉴别与损害评估技术重点实验室基金--溢油鉴定技术评估(07EMC08)
中国科学院知识创新工程重要方向项目--长江口及其附近海域的营养盐的变化过程(KZCX2-207)
国家海洋局北海监测中心主任科研基金--长江口
胶州湾
莱州湾及其附近海域的生态变化过程(05EMC16)
关键词
HCH
分布
污染源
水体效应
胶州湾
HCH
distribution
pollution source
water effect
Jiaozhou Bay
