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Characteristics of Hydrodynamic Dispersion Using a Natural Gradient Tracer Test in a Fractured Rock at the Jwacheon-dong, Busan City  

Chung Sang-Yong (Department of Environmental Geosciences, Pukyong National University)
Kang Dong-Hwan (Department of Environmental Geosciences, Pukyong National University)
Kim Byung-Woo (Department of Environmental Geosciences, Pukyong National University)
Publication Information
The Journal of Engineering Geology / v.16, no.3, 2006 , pp. 245-254 More about this Journal
Abstract
Using a natural gradient tracer test, the characteristics of hydrodynamic dispersion according to each depth of a fractured rock were studied, and the effective porosity and longitudinal dispersivity of the fractured rock were estimated. The difference of vertical hydrodynamic dispersion was identified by concentration breakthrough curves linear regression analyses of bromide concentrations according to depths versus time, and hydraulic fracture characteristics at two intervals of the monitoring well. Higher concentration and faster arrival time at GL- 18 m depth (RQD 13%, average joint spacing 2 cm, TCR 100%) than at GL- 25 m depth (RQD 41%, average joint spacing 7 cm, TCR 100%) resulted from shorter distance and more fractures. Tracer was transported through the 1 st fractures until the arrival of its peak concentration and through the 2nd fractures or matrix diffusion after the arrival of its peak concentration. The increase/decrease slopes of bromide concentration versus time were 3.46/-1.57 at GL-18 m depth and 3.l9/-0.47 at GL- 25 m depth of the monitoring well. So the faster bromide transport was confirmed at GL- 18 m depth with more fractures. The concentration increment of bromide was fitted by a Gaussian function and the concentration decrement of bromide was fitted by an exponential function. Effective porosity and longitudinal dispersivity estimated by CATTI code were 10.50% and 0.85 m, respectively.
Keywords
Natural gradient tracer test; Fractured rock; Hydrodynamic dispersion; Matrix diffusion; Linear regression analysis; Gaussian function; Exponential function; Longitudinal dispersivity;
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1 강병무, 김천수, 배대석, 김경수, 기정석, 1993, 분리열극 개념을 이용한 지하공동주변의 지하수유동분석, 대한 지질공학회, 3(2), pp.125-148
2 이진용, 천정용, 이강근, 이민효, 윤정기, 2001, 다공질 천층대수층에서의 추적자 이동 연구, 지질학회지, 37(2), pp.309-316
3 Sauty, J. P., and Kinzelbach, W., 1992, CATTI: Computer aided tracer test interpretation, International Groundwater Modeling Center, Golden, Colorado
4 Sen, Z., 1995, Applied Hydrogeology for scientists and engineers, CRC Press, Inc., 444p
5 Gelhar, L. W., Welty Claire, and Rehfeldt Kenneth R., 1992, A critical review of data on field-scale dispersion in aquifers, Water Resources Research, 28(7), pp.1955-1974   DOI
6 Becker, M. W., and Shapiro, A. M., 2000, Tracer transport in fractured crystalline rock: Evidence of nondiffusive breakthrough tailing, Water Resources Research, 36(7), pp.1677-1686   DOI   ScienceOn
7 Larry, D. M., Gillham, R. W., and Cherry, J. A., 1993, Field experiments in fractured clay till; 2. Solute and colloid transport, Water Resources Research, 29(12), pp.3879-3890   DOI   ScienceOn
8 박영진, 이강근, 이승구, 1997, 단열교차점에서 유체간섭 에 관한 수치적 고찰, 한국지하수환경학회, 4(3), pp.111-115
9 배대석, 송무영, 김천수, 김경수, 김중렬, 1996, 분리단열 망개념의 지하수유동해석을 위한 단열투수량계수의 정량화 연구, 대한지질공학회, 6(1), pp.1-13
10 채병곤, 최영섭, 이대하, 김원영, 이승구, 김중렬, 1997, 유동성 단열 파악을 위한 암반 내 단열특성 규명, 한국지하수환경학회, 4(2), pp.88-99
11 Lapcevic P. A., Novakowski, K. S., and Sudicky, E. A., 1999, The interpretation of a tracer experiment conducted in a single fracture under conditions of natural groundwater flow, Water Resources Research, 35(8), pp.2301-2312   DOI
12 김경수, 김천수, 배대석, 정지곤, 1998(b), 순산 모델링 기법을 이용한 단열크기 추정방법 고찰, 대한지질공학회, pp.1-12
13 강동환, 2006, 추적자시험을 이용한 단열암반층과 토양 층에서 수리분산특성 연구, 박사학위논문, 부경대학 교, 148p
14 최병렬, 1998, 지하수 유로 조사를 위한 절리계의 응용 지질학적 분석, 대한지질공학회, 8(2), pp.131-143
15 함세영, 김형찬, 임정웅, 1998(a), 수직 지질구조에 의해 서 지배되는 암반지하수 유동의 수리적 성질과 그 예, 한국지하수환경학회, 5(2), pp.101-109
16 Candace, C. C., Stephen, E. S., and Elizabeth, S., 1993, Variation in aperture estimate ratios from hydraulic and tracer tests in a single fracture, Water Resources Research, 29(9), pp.2975-2982   DOI   ScienceOn
17 강동환, 정상용, 김병우, 2005, 단공주입양수 추적자시험 을 이용한 폐기물매립장 주변의 침출수 확산 연구, 한국지하수토양환경학회 춘계학술발표회, pp.105-109
18 Roy C. S., Bertel Nilsson, Martin Hansen, and Johney Fredericia, 1998, Spatially varying hydraulic and solute transport characteristics of a fractured till determined by field tracer tests, Funnen, Denmarks, Water Resources Research, 34(10), pp.2515-2527   DOI   ScienceOn
19 Domenico, P. A., and Schwartz, F. W., 1997, Physical and Chemical Hydrogeology, John Wiely & Sons, Inc., 506p
20 장태우, 강필종, 박석환, 황상구, 이동우, 1983, 부산.가덕도폭, 한국동력자원연구소, 22p
21 Mckay, L. D., Sanford, W. E., and Strong, J. M., 2000, Field-scale migration of colloidal tracers in a fractured shale saprolite, Groundwater, 38(1), pp.139- 147   DOI   ScienceOn
22 함세영, 임정웅, 배두종, 최위찬, 1998(b), 균열암반대수 층의 적정채수량 산정의 적용성 연구, 한국지하수환경학회, 5(1), pp.21-29
23 한일영, 조성만, 정광필, 1995, 지하 LPG 저장공동의 기밀성평가를 위한 분리열극개념의 지하수유동 및 용질 이동 모형 모의기법 적용, 대한지질공학회, 5(2), pp.155-165
24 김경수, 김천수, 배대석, 김원영, 최영섭, 김중렬, 1998(a), 3차원 단열망모델링을 위한 단열수리인자 도 출, 한국지하수환경학회, 5(2), pp.80-87
25 문상호, 함세영, 우남칠, 이철우, 2001, 지하수 추적자, 시그마프레스, 169p
26 차장환, 배광옥, 이강근, 2003, 파쇄 암반대수층에서 Push-pull Tracer Test의 현장 적용사례, 한국지하수 토양환경학회 춘계학술대회, pp.268-271