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该文根据１９９５年１０月水质调查资料，阐明了南汇咀～嵊泗海域重金属元素［］西高东低、底高表低的分布势态，其分布势态取决于径流、湾水、流场、污染源、输沙量和锋面的综合作用。对泥沙在水中的理化性质分析揭示：细颗粒（ｄ＜６３μ）悬沙的吸附和解吸特性是重金属元素和悬沙间具有正相关的内在原因，置换吸附是重金属元素间具有互相关的重要因素之一。通过模糊理论水质综合评价得：该水域上层属Ⅰ级海水，中层属Ⅰ级或Ⅱ级海水，均未受重金属元素污染；底层除二个站受轻度和中度污染外，大致可划分为东、中、西三个水域，东部为Ⅰ级海水，中部为Ⅱ级海水，西部已受重金元素微污染、为Ⅲ级海水。
Based on the water quality survey data of October 1995, the distribution of heavy metal elements [] from the south to the north of the Shengsi area on the western and eastern parts of the country is shown. The distribution of these heavy metals depends on runoff, bay water, flow field, sources of pollution, The combined effect of sediment yield and frontage. Analysis of the physicochemical properties of sediment in water reveals that the adsorption and desorption characteristics of suspended sediment with fine particles (d <63μ) are the intrinsic causes of the positive correlation between heavy metals and suspended sediment. Metabolism of adsorption is the important cross-correlation of heavy metal elements One of the factors. According to fuzzy comprehensive evaluation of water quality, Grade I seawater in the upper part of the water column and grade I or II seawater in the middle layer were not polluted by heavy metal elements. In addition to mild and moderate pollution at the bottom two stations, they were broadly divided into East, west and west of the three waters, the east of Grade Ⅰ seawater, the middle of grade Ⅱ seawater, the west has been heavily polluted by heavy gold, Ⅲ grade seawater.