Study on methods and evaluation of in laboratory tracer

Abstract

Tracer test is useful for understanding mass transport in groundwater. However, there is a limited number of research reported on this topic because it is difficult to conduct a tracer test and to evaluate its data. Therefore, a laboratory test is conducted to investigate the basic procedure and evaluation method for tracer tests. In this study, simple pulse input method was developed. It is found that it is important to reduce the volume of the test section in the well. The measurement setup and size of a well should be carefully considered to evaluate the effective porosity resulted from a tracer and the dispersion coefficients calculated from theoretical solutions. The measurement technique developed in this study can be expected to be applied to in-site test.