某新建人工湖沉积物磷形态分布及环境因素对其影响的实验研究

In this paper sequential extraction method was carried to analyze the distribution features of a new artificial lake in Chongqing, and the environment affecting factors of phosphorus in lake sediments were also studied, these factors include pH value, temperature, dissolved oxygen and light. The results show that the range of pH of the new artificial lake in Chongqing was from 5.34 to 8.12, the concentration of total phosphorus reached 595.8-673.89 mg/kg, and inorganic phosphorus was accounting for 91.50% ~ 96.6%, while \\\"active phosphorus\\\" for 12.00%~15.09%, which affect on the reservoir eutrophication cannot be ignored, its concentration distribution: Lake Island areas > Dam areas > Lake Eastern areas > Tail> Retention areas. Organic phosphorus was important for P accumulation, which concentration reaches to 20.5～55.8mg/kg, accounting for 3.43～8.53%, its concentration distribution: Dam areas > Lake Eastern areas > Retention areas > Lake Island areas > Tail .Through the bottom of the dam drain regularly, phosphorus pollution in the artificial lake can be controlled. Sediment nutrients in the new artificial lake, with changes in environmental factors, research showed the characteristics of releasing first after adsorption. Release of phosphorus in sediments increased rapidly when temperature rise. Higher pH was conducive to release sediment phosphorus. Low water dissolved oxygen would promote sediment phosphorus to release towards the water body. Phosphorus release in sediment in the absence of light conditions was significantly higher than that under light.