广西北海湾COD与水文生物要素及不同形态氮磷的关系

Relationship between COD,hydrological and biological elements,various states of nitrate and phosphate in Beihai Bay,Guangxi

本文探讨了北海湾COD值的分布特征及其与水文、生物要素及不同形态氮、磷含量的关系 .结果表明 :河流输入对本湾COD值的影响突出表现在春、夏季 ,冬季最小 ,秋季则以沿岸排废、排污影响为主 ;水文要素对COD值的分布起主导控制作用 ,生物化学作用仅占次要地位 ;春、夏、冬三个季度月COD值与氮含量的相关性较为显著 。

This paper deals with the distributive characteristics of COD in Beihai Bay,and its relationship with hydrological and biological elements, states of nitrate and phosphate. The results show that the effect of the river input on the COD contents in spring and summer is the largest,and smaller in winter .And the COD contents in autumn are mainly affected by the littoral waste and sewage drainage.The hydrologyical elements play a dominant role on the COD contents,while biochemical elements have less importance. The correlation between COD and nitrate in spring,summer and winter is more remarkable,while the correlation between COD and phosphate is more remarkable in autumn.