摘要
构建了太湖水生态动力学模型(CAEDYM),依据已有相关研究成果对模型参数进行了初选,利用2005年的水文、气象、水质等监测数据对模型参数进行了率定,分析了湖泊水体磷的循环机制和沉积物内源磷的释放机制.结果表明,水温和溶解氧的模拟结果与实测数据非常吻合,TP、PO43-和Chl-a的变化趋势也与实测结果基本相同.浮游植物优势种的演替模式表现为:冬季隐藻和硅藻占优势,春季绿藻占优势,夏季和秋季蓝藻占优势;磷的内源释放对太湖磷循环影响的模拟结果表明,在不改变外源输入的情况下,降低底泥中磷的再悬浮作用能够有效降低水体中Chl-a的浓度,但对水体中TP及PO43-的影响较小.
The one-dimensional CAEDYM model was used to study the principle of ecological dynamics of phosphorus circle in Taihu Lake.The cycling mechanisms of phosphorus,the release mechanisms of internal loading in sediments and the action of algae in shallow lake were studied by CAEDYM model.The parameters of the model were calibrated by the monitoring data of 2005.The simulated results showed good agreement with observed data for water temperature and dissolved oxygen in 2005.Total phosphorus（TP）,PO4 and Chl-a also followed the observed seasonal patterns.The simulated seasonal succession of dominant phytoplankton species was as follows： diatoms dominate in winter,chlorophytes dominate in spring,and cyanobacteria dominate in summer and autumn.Simulations of scenarios with a reduced internal phosphorus loading showed that a substantial reduction（50%） of internal phosphorus loading can decrease the concentration of Chl-a,and the changes of TP and PO4 were not significant.This finding indicated that the external phosphorus loading plays an important role in the eutrophication of Taihu Lake.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2011年第5期858-862,共5页
China Environmental Science
基金
国家自然科学基金资助项目(41001032)
