水体中磷负荷量的增加与富营养化现象的发生关系密切。根据湖中磷的物质平衡原理，结合2006～2007年南四湖的空间监测数据，建立了磷浓度与湖泊磷负荷量之间的经验模型，分别给出了南四湖上级湖、下级湖的降解系数为3．87×10－3 d－1和2．46×10－3 d－1。以2010～2011年的空间监测数据为基础，对总磷模型进行了验证，表明该模型在南四湖上级湖和下级湖的适用性和可行性。结果表明：模型能很好地预测磷浓度，误差在5％以内，可以作为南四湖上、下级湖磷负荷变化的预测模型。%The occurrence of the eutrophication phenomenon is closely related to the increase of phosphate load capacity in the water .According to the materials balance approach of phosphate in the lake and combining with the space monitoring data of Nansi Lake from 2006 to 2007 ,the article constructs an experiential model between concentration of phosphate and phosphate load capacity in the lake , and gives the degradation coefficient of upper lake and subordinate lake of Nansi Lake , namely 3 .87 × 10-3 d-1 and 2 .46 × 10-3 d-1 respectively .Based on the space monitoring data of Nansi Lake from 2010 to 2011 ,the article also verifies the phosphate modeling ,which shows the feasibility and applicability of this model in the Nansi Lake .T he results indicate that the model can w ell predict the concentration of phosphate and the errors are within 5% ,which can be adopted as a forecasting model for predicting the load capacity of phosphate in the upper and subordinate lakes of Nansi Lake .
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