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Analysis of Groundwater Flow Characterization in Fractured Aquifer System  

Kim Yong-Je (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources)
Kim Tae-Hee (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources)
Kim Kue-Young (Groundwater and Geothermal Resources Division, Korea Institute of Geoscience and Mineral Resources)
Hwang Se-Ho (Geological and Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources)
Chae Byung-Gon (Geological and Environmental Hazards Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of Soil and Groundwater Environment / v.10, no.4, 2005 , pp. 33-44 More about this Journal
Abstract
On the basis of a stepwise and careful integration of various field and laboratory methods the analysis of groundwater flow characterization was performed with five boreholes (BH-1, -2, -3, -4, -5) on a pilot site of Natural Forest Park in Guemsan-gun, Chungcheongbook-do, Korea. The regional lineaments of NW-SE are primarily developed on the area, which results in the development of many fractures of NW-SE direction around boreholes made in the test site for the study. A series of surface geological survey, core logging, geophysical logging, tomography, tracer tests, and heat-pulse flowmeter logging were carried out to determine fracture characteristics and fracture connectivity between the boreholes. In the result of fracture connectivity analysis BH-1 the injection well has a poor connectivity with BH-2 and BH-3, whereas a good with BH-4 and BH-5. In order to analyse the hydraulic connectivity between BH-1 and BH-5, in particular, a conspicuous groundwater outflux in the depth of 12 m and influx in the depth of 65 m and 70 m, but partly in/outflux occurred in other depths in BH-5 were observed as pumping from BH-1. On the other hand, when pumping from BH-5 the strong outflux in the depths of 17 m and 70 m was occurred. The spatial connectivity between the boreholes was examined in the depth of 15 m, 67 m, and 71 m in BH-1 as well as in the depth of 15 m, 17 m, 22 m, 72 m, and 83 m in BH-5.
Keywords
Groundwater flow; Geophysical logging; Tracer test; Flowmeter test; Fracture connectivity;
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