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Abstract 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.
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Received: 08 February 2015
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