摘要
借助于土柱物理模型装置，试验研究了保守性污染物在非饱和土壤中的迁移规律，得到了污染物瞬时输入和连续输入条件下，非饱和土壤中污染物浓度时空变化的过程．在分析实测资料的基础上，提出了采用考虑可动水体与不可动水体因素的数学模型来描述土柱内污染物的迁移过程．根据实测资料和数学模型的数值解，运用最优化技术率定模型参数，得到了具有应用价值的参数成果．
Laboratory soil column tests are used to investigate the contaminant transport ofnon-sorption transport in unsaturated porous media. A new type of tension sensor is used tocollect soil-tension data automatically. Through soil column tests, many data are obtained.The soil hydraulic and transport parameters are estimated by using tracer and a combinedsimulation-optimization approach under various flow conditions. A nonlinear weighted leastsquare algorithm is used to estimate unknown model parameters with minimized deviations.The model parameters obtained are of practical value.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1996年第2期7-13,共7页
Journal of Hohai University(Natural Sciences)
基金
河海大学水资源开发利用国家专业实验室开放基金
关键词
土壤
污染物
非饱和土壤
迁移
模型试验
contaminant
unsaturated soils
transport
soil column testsl optimizationtechnigue
parameter rating
