广州海域潜在性富营养化特征研究

主要根据广州海洋资源环境监测中心的监测资料,运用一种反映营养盐限制特征的近海海水富营养化评价模式,对2003年广州海域富营养化水平特征进行了研究。结果表明,广州海域营养盐含量较高,无机氮浓度全年劣于国家海水水质四类标准(GB3097-1997),无机磷浓度在春夏季大部分处于三、四类水质标准之间,秋冬季则劣于国家海水水质四类标准;广州海域主要为磷限制潜在性富营养水平或磷中等限制潜在性富营养水平。同时,近二十年来,广州海域的无机磷、无机氮浓度的年平均值呈逐年增长趋势。

The Assessment of Potential Eutrophication in Guangzhou Sea Area

In this paper, based the monitoring data from May to December of 2003 in Guangzhou sea area, eutrophication in this area was assessed with a model refering to nutrient-limited characters,. Results showed that there was of a high nutrients concentration in Guangzhou sea area. The concentrations of DIN were higher than Sea water quality standard VI(GB 3097-1997). The concentrations of phosphate were between the Sea water quality standard of III and VI (GB 3097-1997) in spring and summer , while were higher than Sea water quality standard VI during rest of the year. Most of this area was at the stage of phosphorus-limited potential eutrophication or slightly-phosphorus-limited potential eutrophication. The concentrations of phosphate and DIN were increased annually in recent 20 years in Guangzhou sea area.