黄土坡面土壤溶质随径流迁移有效混合深度模型特征分析

Analysis on the feature of effective mixing depth model for soil solute transporting with surface runoff on loess slope

本文依据饱和土壤条件下有效混合深度概念,建立了适合黄土坡面的土壤溶质向地表径流传递的有效混合深度模型。完全混合深度模型结构简单,参数便于获取。而不完全混合深度模型形式上相对复杂,参数获取具有一定难度,为此给出了不完全混合模型的简化形式。利用试验资料分析了完全混合深度模型和不完全混合深度模型与实测径流溶质浓度匹配程度,结果显示不完全混合模型能更好配合径流溶质浓度变化过程,同时计算的累计径流溶质质量准确性也高于完全混合深度模型。

Based on the concept of effective mixing depth a mathematical model describing the soil solute transporting with surface runoff on loess slope is developed.The incomplete mixing model is complex in structure,and is relatively difficult to obtain the related parameters.Where as,the completed mixing model is simple in structure,and the parameters in the model are easy to obtain.So that a simplified model for the incomplete mixing model is suggested.The experimental data fitting shows that,the incomplete mixing model fits the experimental data better than the complete mixing model,and the calculated accumulated solute amount by the incomplete mixing model is more accurate.