黄河口及邻近海域氮、磷及环境质量评价

On nitrogen and phosphate,and environmental quality assessment of the Yellow River Estuary and adjacent waters

根据2008年和2009年5、884个航次黄河口及邻近海域监测数据,分析了该海域氮磷含量和分布,与历史数据进行比较,分析年际动态变化、营养类型,并进行有机污染和营养状态评价.结果表明：整个黄河口及邻近海域氮营养水平较高,大部分海域磷酸盐营养水平较低,营养类型为磷限制潜在性富营养;整个监测海域处于中～富营养状态,春季（5月）富营养水平稍重于秋季（8月）,河口近岸海域和南部海域富营养水平较重;2008年5月和2009年8月监测海域有机污染评价为开始受污染,2008年8月和2009年5月水质较好.

We analyzed content and distribution, dynamic change, and trophic type of nitrogen and phosphate, and evaluated environmental quality in the Yellow River Estuary and adjacent waters based on the monitoring data from 4 cruises in May 2008, August 2008, May 2009 and August 2009. The result indicated that nitrogen level was high in the Yellow River Estuary and adjacent waters, but phosphate level was low in most sea areas. The trophic type was in potential eutrophy limited by phosphorus. Trophie status of the sea areas was in mesotrophy to eutrophy. The eutrophy level in May was higher than in August, and it was higher in coastal and southward sea areas. The water quality of the sea areas was initially polluted in May 2008 and in August 2009, but it became better in August 2008 and in May 2009.