割れ目状不均質場への雨水浸透に関する実験

Abstract

Recognizing that the infiltration phenomenon of rain water into the ground occurs in thefinite domain between the ground surface and the bedrock or groundwater surface, we have in-vestigated the effect of the movement of pore-air on the infiltration process. In this paper, as anexample of the heterogeneous domain, the infiltration into a homogeneous sand layer with asand-pile made of a coarser sand is experimentally examined under the conditions of ponded in-filtration and rainfall infiltration. Especially, the formation of the quasi-saturated zone, the pres-sure of pore-air and the infiltration rate are discussed in comparison with those in the homo-geneous domain.