Abstract
This paper examines an effect of stochastic and scale-dependent hydraulic conductivity on the infiltration in a site respectively. These are evaluated using the aggregation criteria of the infiltration derived from Philip's equations. The values of hydraulic conductivity in a forest hill slope measured from 100cc-7000cc sampler are distributed according to the Log-normal distribution Ones in a bare kanto loam soil measured from 100cc are also distributed according to the Log-normal distribution, and the others measured by means of trenches are distributed according to the normal distribution. All variations in both sites can be aggregated by means of parameter mean method respectively, but their mean vales in the same sites are found to be scale-dependent from statistical test, and they can produce a significant effect on the infiltration calculation.
