Browse > Article

Hydrodynamic Dispersion Characteristics of Multi-soil Layer from a Field Tracer Test and Laboratory Column Experiments  

Kang, Dong-Hwan (Department of Environmental Geosciences, Pukyong National University)
Yang, Sung-Il (Department of Environmental Geosciences, Pukyong National University)
Kim, Tae-Yeong (Department of Environmental Geosciences, Pukyong National University)
Kim, Sung-Soo (Department of Environmental Geosciences, Pukyong National University)
Chung, Sang-Yong (Department of Environmental Geosciences, Pukyong National University)
Publication Information
Journal of Soil and Groundwater Environment / v.13, no.4, 2008 , pp. 1-7 More about this Journal
Abstract
This study analyzed for hydrodynamic dispersion characteristics of multi-soil layer (Silt and clay, Find sand, Coarse sand), data of a field tracer test on the multi-soil layer and data of laboratory column experiments on the samples on each soil layers. Through the analysis of permeability and flow, MS (Silt and clay) and FS (Fine sand), which were low effective porosity, were higher average linear velocity while CS (Coarse sand), which was high effective porosity, was higher hydraulic conductivity. Hydraulic conductivity function based on average soil particle diameter was assumed Y=$3.49{\times}10^{-8}e^{15320x}$ and coefficient of determination was 0.90. Average linear velocity function based on average soil particle diameter was assumed Y=$1.88{\times}10^{-7}e^{11459x}$ and coefficient of determination was 0.81. Longitudinal dispersivity function based on average soil particle diameter was Y = 0.00256$e^{5971x}$ and coefficient of determination was 0.98. According to the linear regression analysis of average linear velocity and longitudinal dispersivity, assumed function was Y = 21.7527x + 0.0063, and coefficient of determination was 0.9979. The ratio of field scale/laboratory scale was 54.09, it exhibited scale-dependent effect of hydrodynamic dispersion. Field longitudinal dispersivity (1.39m) was 7.47 times as higher than longitudinal dispersivity estimated by the methods of Xu and Eckstein (1995). Hydrodynamic dispersion on CS layer was occurred mainly by diffusion flow in the test aquifer.
Keywords
Multi-soil layer deposit; Average soil particle diameter; Hydraulic conductivity; Average linear velocity; Longitudinal dispersivity; Scale dependent effect;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 강동환, 정상용, 2006, 실내주상실험에 의한 불균일한 토양의 입도와 수리분산기작의 상관성 연구, 한국지하수토양환경학회지, 11(6), 28-34   과학기술학회마을
2 이진용, 천정용, 이강근, 이민효, 윤정기, 2001, 다공질 천층 대수층에서의 추적자 이동 연구, 지질학회지, 37(2), 309-316
3 장연수, 임종주, 1997, 해성점토와 풍화토의 오염물 흡착능에 관한 실험 연구, 한국지하수토양환경학회지, 4(2), 78-84
4 한정상, 1998, 지하수환경과 오염, 박영사, p. 1071
5 Bromly, M., Hinz, C., and Aylmore, L.A.G., 2007, Relation of dispersivity to properties of homogeneous saturated repacked soil columns, European Journal of Soil Science, 58, 293-301   DOI   ScienceOn
6 Dirk, S.M., 2005, Longitudinal dispersivity data and implications for scaling behavior, groundwater, 43(3), 443-456
7 Farenhorst, A. and Bryan, R.B., 1995, Particle size distribution of sediment transported by shallow flow, Catena, 25, 47-62   DOI   ScienceOn
8 Neuman, S.P., 1990, Universal scaling of hydraulic conductivities and dispersivities in geologic media, Water Resources Research, 26(8), 1749-1758   DOI
9 Wheatcraft, S.W. and Tyler, S.W., 1988, An explanation of scale-dependent dispersivity in heterogeneous aquifers using concepts of fractal geometry, Water Resources Research, 24(4), 566-578   DOI
10 Xu, M. and Eckstein, Y., 1995, Use of weighted least-squares method in evaluation of the relationship between dispersivity and field scale, Ground Water, 33(6), 905-908   DOI   ScienceOn
11 한정상, 장호완, 한규상, 고경석, 이영동, 유대호, 1991, 울산 공업단지 지하수 오염 예측을 위한 정량적 수리분산 연구, 지질학회지, 27(1), 98-116
12 농업기반공사, 2003, 문현지구 오염부지정화사업, p. 249
13 정경영, 배열호, 최상일, 1996, DNAPL Pool의 용해실험에 의한 분산계수 산정, 한국지하수토양환경학회지, 1(1), 19-27
14 김용제, 김태희, 김구용, 황세호, 채병곤, 2005, 파쇄대 응회암 대수층의 지하수 유동 특성화 기법, 한국지하수토양환경학회지, 10(4), 33-44   과학기술학회마을
15 정상용, 강동환, 이민희, 손주형, 2006, 복합토양층의 불포화대와 포화대에서 연속주입 추적자시험을 이용한 수리분산특성 연구, 한국지하수토양학회지, 11(4), 48-56   과학기술학회마을
16 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), 1955-1974   DOI
17 Dirk, S.M., Carlson, D.A., Cherkauer, D.S., and Malik, P., 1999, Scale dependency of hydraulic conductivity in heterogeneous media, Ground Water, 37(6), 904-919   DOI