陆源污染物大多经由河口入海,故在研究河口区污染物的迁移、扩散和转化时,可把河口当作“总排污口”(污染源)。 从河口进入海洋中的污染物有油类、重金属和农药等。它们多以悬浮态或粘附在悬浮物质上进入海洋。从河口到海洋,环境条件不断改变,温度、盐度、酸碱度、氧化还原状况、 Most of the land-based pollutants enter the sea via estuaries. Therefore, when studying the migration, diffusion and transformation of pollutants in estuarine areas, the estuaries can be regarded as the “total pollutant discharge outlet” (source of pollution). Pollutants that enter the ocean from estuaries are oils, heavy metals and pesticides. Most of them are suspended or adhered to the suspended matter entering the sea. From estuaries to oceans, environmental conditions are constantly changing. Temperature, salinity, pH, redox status,