长江芜湖段水体中溶解氧现状及其影响因素

THE DISSOLVED OXYGEN IN WATER AND INFLUENCING FACTORS IN THE SECTION OF CHANGJIANG OF WUHU

用长江芜湖段近五年监测数据分析该江段中溶解氧随枯水期→平水期→丰水期呈递减趋势的现状,并用回归分析中相关系数分析了水体中水温、悬浮物、高锰酸盐指数及电导率对溶解氧的影响变化规律.揭示了水体中水温、悬浮物、高锰酸盐指数是影响溶解氧的重要因素.

Applying the past five years＇ supervised datas of the section of Changjiang River, the paper analyzes the dissolved oxygen of this section . The dissolved oxygen is decreasing following the dry season, usual season and heavy season of the river. And then it utilizes the coefficient of the regression to analyze the water-water temperature, suspended matters, the indicator of permanganate and the regularity of the influence made by five years＇ biochemical oxygen and conductance. The result reveals that the water-water temperature, suspended matters and the indicator of permanganate are the important factors influencing the dissolved oxygen.