Abstract
Understanding the behavior and content of soil water is important for analysis of its infiltration. Tensiometers are conventionally used to measure the suction pressure. The suction pressure is then converted into the volume of water content by using conversion equation. The problem with this method is that the water content, computed by conversion equation, is remarkably different depending on the equation used. Our research intended to give the relationship between the volume of water content and the suction pressure. Both of them were measured at the same time on real slopes by time domain reflectometry (TDR), which is capable of directly measuring the volume of water content. The volume of water content computed by TDR was compared with the water content converted from the suction pressure by the traditional method to study the accuracy and characteristics of TDR. Here, we also discuss the results of the comparison.
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