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我国北方沉积平原盐渍化土壤中的溶质运移过程,土壤吸附作用与不动水体的影响不允忽视,本文针对盐渍化土壤溶质动态模型—双曲型偏微分控制方程,给出在考虑土壤吸附作用与不动水体影响下的(1)Bresler 对时间导数取高次近似的差分法;(2)二次迎风隐式差分法;()特征—有限元法等3种数值解法及比较研究与应用条件,可供灌区土壤溶质动态监测与预报模似应用。
The influence of solute transport process, soil adsorption and immobile water in salinized soils of the sedimentary plain in the north of China can not be neglected. In this paper, the solute dynamic model of hyperbolic soil-salinized soil is given, Under the influence of soil adsorption and immobile body of water, (1) Bresler takes the high degree of approximation of time derivative difference method; (2) Second-order upwind implicit difference method; () FEATURE-FEA method and other three kinds of numerical solution and comparison Research and application conditions, for the dynamic monitoring of soil solutes irrigation and forecasting analogy applications.