深水湖泊氮和磷沿水深的分布特性

为探索水体中氮、磷浓度与水深的响应特性,选择重庆某典型山地深水湖泊——龙景湖,开展氮、磷浓度分布与深度相关性实验研究.结果表明,龙景湖总氮、总磷浓度均呈现沿水深增加的趋势.龙景湖总氮浓度为0.65~3.77mg/L,总磷浓度为0.016~0.65mg/L.龙景湖全区总氮浓度与水深成显著相关关系,回归方程F值的相伴概率小于0.05;95%的区域总磷与深度呈显著相关关系,总磷与水深拟合优度平均值为0.8734,平均F值相伴概率为0.024.可考虑通过调节水深的方式调节湖泊上层水体中氮、磷浓度,从而控制湖泊富营养化程度.

Distribution features of the nitrogen and phosphorus along the depth of deep lake

In order to explore the response characteristics between the concentration of nitrogen and phosphorus in water and the depth of water, this paper chose a typical mountain deep lake of Chongqing——Lake Longjing to carry out the experimental study. Concentration of total nitrogen in Lake Longjing was 0.65~3.77mg/L and the total phosphorus was 0.016~0.64mg/L. The total nitrogen concentration and water depth were significantly correlated in the whole lake and the regression equation’s accompanied probability of F value are all less than 0.05; the total phosphorus and water deeps were significantly correlated in 95% areas and the average value of R2 was 0.8734, the accompanied probability of average F value was 0.024. Therefore, the degree of eutrophication can be controlled by adjusting the water depth to regulate the concentration of the nitrogen and phosphorus in the upper water.