Analysis of the Effect of Rainfall Intensity on Capillary Shock Time and Capillary Shock Height in Fine-Grain Soil Layers

Abstract

After first successfully validating the capillary shock test model that the research team specifically designed, the research continued by using media of fine-grained soil types. This test was carried out with the aim of analyzing the extent of the influence of the rainfall intensity parameter on the capillary shock parameter. In addition, the use of fine-grained soil was chosen as a simulation medium to observe the capillary shock process because we wanted to know the relationship between soil particle size and the capillary shock parameters that occurred. There are 3 variations of rainfall intensity levels, each with a return period of 5 years, 15 years, and 25 years (I5, I15, and I25). The types of fine-grained soil used as media are sandy, silty clay, silty sandy clay, and sandy, clayey silt. From a series of laboratory test results, it was found that; (1) The intensity of rainfall has a very significant influence on the capillary shock parameters, both on the capillary shock time and on the capillary shock height. The higher the intensity of rainfall at the beginning of the rainy season, the shorter the capillary shock time, and the lower the capillary shock height that occurs. (2) The effect of fine-grained soil particle size on capillary shock parameters is also very significant, both on capillary shock time and on capillary shock height. The finer the soil particles, the longer the capillary shock time and the higher the capillary shock height.