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本文通过对３ 种不同质地土壤（ 砂质壤土、壤质粘土和粉砂壤土） 的室内水盐入渗实验资料的分析，依据山口（Ｙａｍａｇｕｃｈｉ） 等提出的斜率法和等斜率法， 由土壤溶质运移的穿透曲线数据， 同时估算了平均孔隙流速和水动力弥散系数， 并与实测值、简化解析解法及矩法求算的结果进行了比较． 此外， 作者还探讨了抛物插值和Ｂｒｅｎｎｅｒ 数大小对求参精度的影响．
Based on the analysis of laboratory water and salt infiltration data of three different soil types (sandy loam, loamy clay and silty loamy soil), the slope and equi-slope methods proposed by Yamaguchi et al. The results also show that the average pore velocity and the hydrodynamic dispersion coefficient are estimated at the same time. The results are compared with the measured values, the simplified analytical solution method and the result of the moment method. In addition, the author also discusses the influence of parabolic interpolation and Brenner number on the precision of the parameters.