Korea Institute of Geoscience and Mineral Resources

Kyoochul Ha

Dong-Chan Koh

Heejun Suk

Heesung Yoon

Yongcheol Kim

Kilyong Lee

Kyung-Seok Ko

Young Cheon Won

Disclosed is a monitoring probe for observing groundwater, which is put into an observation well for observing the groundwater to indicate a position of a fresh water-salt water interface of the groundwater. According to the present invention, both ends of a probe body are separated from an inner circumference of an observation well by a catch preventing portion having a convex curved portion or a dumbbell-shaped portion, so that the probe body can be smoothly moved up and down without being caught by a ground-water inlet port of the observation well, thus providing an exact position of a fresh water-salt water interface.

Monitoring probe for detecting the position of a fresh water-salt water interface in an observation well

The present invention relates to an apparatus and method of measuring effective porosity of various media such as rock or soil using radon that is an inert gas. An apparatus of measuring porosity according to the present invention includes: a gas component detector having two ports and configured to measure a concentration of a predetermined gas; a gas vessel having two ports and configured to accommodate the predetermined gas; a medium vessel having two ports and configured to accommodate a medium, of which the porosity is desirous to be measured; pipe lines connecting the ports of the gas component detector, the gas vessel and the medium vessel; and valves installed on the pipe lines.

Apparatus and method of measuring effective porosity using radon

Disclosed is a method of seeking semianalytical solutions to multispecies transport equations coupled with sequential first-order network reactions under conditions wherein a groundwater flow velocity and a dispersion coefficient vary spatially and temporally and boundary conditions vary temporally. This invention provides a method of seeking semianalytical solutions to dechlorination equations coupled with sequential first-order reactions, wherein analytical solutions to complex problems such as inhomogeneous media and unsteady flow are derived by combining a similarity transformation method of Clement and a generalized integral-transform technique (GITT), and are verified through comparison with 2DFATMIC which is a commercial numerical program, and thereby can be utilized in nuclear waste sites contaminated with radioactive materials and decayed daughter nuclides and industrial complexes contaminated with chlorinated organic solvents such as PCE (tetrachloroethene), TCE (trichloroethene) and biodegradable byproducts thereof, and can also be widely used in verification of developed numerical programs.

Method of seeking semianalytical solutions to multispecies transport equations coupled with sequential first-order reactions

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Daejeon, South Korea

Kyoochul Ha