INFLUENCES OF RAINFALL INTENSITY AND SEEPAGE RATE ON INFILTRATION IN DIKE MATERIAL WITH DIFFERENT MONITORING METHODOLOGIES

Abstract

Since a river dike located at the downstream, where urbanization has been in progress, is composed of sandy soil consisting mainly of soft and fine particles, the river dike is considered to be easily damaged by pore air that has been enclosed within the dike. By performing experiments using a small soil column model equipped with rainfall and raising seepage apparatus, the behaviors of pore air and pore water by the infiltration was visualized and investigated with pressure meters for pore air and pore water, moisture meter and specific resistivity monitoring. As a result, it is pointed out that the moisture meter and the resistivity monitoring show early response followed by increment of pore air pressure, and then the pore water pressure increases after it is perfectly submerged. Further studies are needed to put the right monitoring system in the right place and the adequate.