摘要
依据污染物的迁移转化途径，建立了模拟预测迁移型污染物变化的整体数学模型，整体模型由表土层模型、下包气带模型、含水层模型组成，表土层模型为黑箱模型，下包气带模型为一维垂向迁移模型，含水层模型为二维平面迁移模型，子模型之间用流量和污染物浓度耦合·在河北省新河县污灌试验区进行的实例应用中，对求解复杂的含水层模型，采用美国IOWA大学教授陈景仁提出的有限分析法求解，经实测资料验证，整体模型是可靠的，并模拟预测了该区在现状污灌状态下，迁移型重金属As、Cr+6和可降解有机物BOD、COD的变化趋势。
A whole mathematic model of the sewage irrigation system is established in this paper. The model is consist of the surface layer soil model, the lower zone of aeration model and the groundwater model. The surface layer soil model is a nblack box″ model. The lower zone of aeration model is a one-dimensional vertical migration model. The ground water model is a two-dimensional plane migration model. These unit models are coupled with water quantity and density of contamination. The whole model is applied in Xinhe city. The ground water unit model is solved with finate analytic method that is presented by Preofessor Chen Jinren of EOWA university of the United State. The whole model is verified by computationed result. And density vary of As Cr+6 BOD COD is forecasted in the current sewage irrigation condition, and the time in that density of contamination is equal to the criterion value is computed.
出处
《水利水电技术》
CSCD
北大核心
1996年第7期37-41,共5页
Water Resources and Hydropower Engineering
关键词
灌溉
污水灌溉
污染物
数学模型
sewage irrigation system, migration pollutant, whole model, mathematic model
