土壤水力学特征参数空间变异的研究方法评述

A review of study methods on spatial variability of soil hydraulic properties

对非饱和土壤水力学特征参数空间变异的标定理论、随机理论、土壤传递函数、分形理论和统计方法等5种研究方法作了比较全面的介绍,分析了各种方法的优点和局限性,指出了土壤水力学特征参数空间变异研究中需要解决的参数测定、模型系数单一化和参数空间变异特征3个关键问题,认为多种方法相结合是研究土壤水力学特征参数空间变异尤其是大尺度空间变异的有效途径。

This paper introduced the five kinds of study methods,such as are scaling theory,stochastic theory,PTFs,fractal theory and statistics methods on spatial variability of unsaturated soil hydraulic properties,and analysed the advantages and limits of these methods.The three key problems that need to be resolved were pointed out which were parameter determination,sterotyped coefficient and properties of spatial variability.This paper also suggested that the combination of the various methods is the valid means to study spatial variability of soil hydraulic properties,especially in large scales.