浙江省长潭水库溶解氧的时空分布特征及影响因素分析

Analysis on Temporal-spatial Distributive Characteristics and Influential Factors of Dissolved Oxygen in Changtan Reservoir of Zhejiang Province

根据2008年浙江省长潭水库多点水质监测数据,分析了水库水体中溶解氧(DO)的时空分布特征及其影响因素。结果表明:该水库DO含量基本上处于Ⅰ类水平,呈明显的季节性变化,表现为春季和冬季比较高,夏季和秋季比较低。水体DO含量与水温之间存在极显著的负相关关系,与pH之间呈极显著的二次函数关系。水体DO含量与硝酸盐氮含量之间呈显著的正相关,与硫酸盐、COD之间都呈极显著的负相关,与总氮和氨态氮之间呈显著的负相关。

Based on the water quality monitoring data of Changtan reservoir of Zhejiang province in the year 2008,the temporal-spatial distributive characteristics and influential factors of dissolved oxygen（DO） in the water body of this reservoir were analyzed.The results showed that the DO content in the reservoir mainly belonged to grade Ⅰ,and it appeared obvious seasonal changes： higher content in spring and winter,and lower content in summer and autumn.The content of DO in the water body was extremely significantly negatively correlated with water temperature,and it had extremely significant quadratic functional relation with pH-value.The DO content in the water body was significantly positively correlated with the content of nitrate nitrogen,but it was very significantly negatively correlated with sulfate content and COD,and it had significant negative correlation with the content of total nitrogen and ammoniacal nitrogen.