摘要
介绍边界条件设置为工业时代以前太湖流域处于自然农耕状况下,对太湖的总氮和总磷沉积反演200年的数值模拟研究。模拟反映了自然状况占1990s湖泊富营养化观测资料的湖区总氮约7%,占总磷约12%。模拟总氮和总磷浓度与太湖沉积钻孔沉积样推算的水体含量的数量级和变化范围相当,太湖流域的营养盐空间来源模拟也能够与流域自然地理变化吻合,表明模拟能够捕捉到流域营养盐历史变化特征,对湖泊营养物质来源、沉积和空间分布的流域环境历史变化响应具有良好模拟能力。
Nutrient sedimentations of total nitrogen （TN） and total phosphorus （TP） during the last 200 years were simulated through a boundary condition prescription of a pre-industrial time mode in Taihu catchment. Simulations show that natural nutrient productions are ca 7% TN and ca 12% TP of 1990s production. Time series simulations are consistent with sediment records from lake bottom cores back to 100 years ago, and spatial distribution modeling of nutrient resources are agreement with changes in the geographical features. The work suggests that the simulations can catch basic characters of the basin nutrient changes, and provides a powerful tool to evaluate nutrient resources, sedimentations and distributions responding to historical changes in catchment environments.
出处
《沉积学报》
CAS
CSCD
北大核心
2006年第6期849-856,共8页
Acta Sedimentologica Sinica
基金
中国科学院南京地理与湖泊研究所和科技部国家重点基础研究发展规划973项目(2002CB412300-1)联合资助.
关键词
自然农耕环境
营养盐沉积
数值模拟
百年反演
太湖流域
natural agricultural environments, sedimentary nutrients, numerical simulation, centurial reconstruction, Taihu catchment
