2020 Volume 76 Issue 2 Pages 215-220
Capillary barrier (CB) is a tilting soil layer system which is composed of a fine soil layer overlaid on a coarse soil layer. Suitable materials for the fine soil and coarse soil used to make a CB are not confirmed. In particular, it is important to clarify that the fine soil has sufficient influence on the diversion length of the CB system. A horizontal distance from the beginning of water flow to this point of percolation is called a diversion length of the CB, and is one of important parameters in designing structural dimensions and configuration of the CB system. In this paper, the theoretical equation proposed by Ross-Steenhuis, fine soil permeability, water retention, are used to clarify an appropriate a fine soil for maximizing diversion length.
