【摘要】 本文将土壤中水流运动和溶质迁移结合,考虑降雨、扩散和对流作用对溶质地表径流损失的影响,对溶质的地表损失规律进行研究,建立了新的水流和溶质迁移模型。通过室内土壤实验对该模型进行了验证,实验数据和模拟结果吻合良好。此模型可用来分析灌溉田块中溶质地表及地下流失,为农业面源污染分析提供参考。更多还原

【Abstract】 Based on solute transport and water flow model the solute losses due to surface runoff flow and subsurface water movement were studied and a model considering the effects of rainfall,diffusion and convection on solute loss is established.The validity of the model is verified by experiments in two types of soil.It verifies that the solute loss due to surface runoff and subsurface water movement in the scale of irrigated district can be simulated by the proposed model which may provide reference for management of agricultural non-point pollution.更多还原