丁字湾大潮汛期营养状况及其变化分析

ANALYSIS OF NUTRITION STATUS QUO AND VARIATION OF DINGZI BAY DURING SPRING-TIDE PHASE

应用１９９５年７月中大潮汛期丁字湾化学耗氧量（ＣＯＤ）、无机氮（ＩＮ）、无机磷（ＩＰ）和溶解氧（ＤＯ）等化学指标，以有机污染综合指数法和富营养化判别关系式对丁字湾的有机污染水平及富营养化程度进行了分析评价；并与１９８７年同期该湾的营养状况进行对比分析。结果表明，丁字湾湾外湾内均受到不同程度的有机污染，但达到富营养化水平的水域，主要在湾的中部和顶部。与１９８７年同期比较，有机污染及富营养化程度加剧。

The data about COD、IN、IP、and D0 in Dingzi Bay during the spring tide phase in July, 1995 were used to evaluate its nutrition status quo and variation by means of the exponential method and eutrophication distinguish formula. The results showed that the whole Dingzi Bay was polluted at with organic substances different levels, while the eutrophication waters were found in the middle and end of the Bay. In comparison with the same time of 1987, organic pollution and eutrophication of the Bay were apparently aggravated.