Determination of two-dimensional laboratory-scale dispersivities

Song Bae Kim; Kyu Hyeok Jo; Dong Ju Kim; William A. Jury

doi:10.1002/hyp.1475

Determination of two-dimensional laboratory-scale dispersivities

Song Bae Kim, Kyu Hyeok Jo, Dong Ju Kim, William A. Jury

Department of Earth and Environmental Sciences

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

A tracer test was conducted in a laboratory chamber representing a two-dimensional aquifer to investigate the longitudinal dispersivity (_L) and the ratio (_T/_L of transverse to longitudinal dispersivity of sandy aquifer materials. Dispersive parameters were obtained by matching the observed chloride plumes at 9 hours and 16 hours after tracer injection with those simulated by a flow and transport model. The best match was found for α_L = 0.2 - 0.25 cm and α_T/α_L = 0.2. The ratio of α_T/α_L = 0.2 was within the range of laboratory values reported in the literature. Sensitivity analysis revealed that the tracer plume concentration and shape were more sensitive to variations in longitudinal dispersivity than to the ratio of transverse to longitudinal dispersivity. This result contrasted with findings of others, showing that the dispersivity ratio greatly affects contaminant plume shape. However, our experimental boundary conditions restricted expansion of the plume normal to the direction of flow and thus affected the parameter estimation.

Original language	English
Pages (from-to)	2475-2483
Number of pages	9
Journal	Hydrological Processes
Volume	18
Issue number	13
DOIs	https://doi.org/10.1002/hyp.1475
Publication status	Published - 2004 Sept

Keywords

Chloride
Dispersivity
Sensitivity analysis
Tracer test
Transport model

ASJC Scopus subject areas

Water Science and Technology

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10.1002/hyp.1475

Cite this

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title = "Determination of two-dimensional laboratory-scale dispersivities",

abstract = "A tracer test was conducted in a laboratory chamber representing a two-dimensional aquifer to investigate the longitudinal dispersivity (L) and the ratio (T/L of transverse to longitudinal dispersivity of sandy aquifer materials. Dispersive parameters were obtained by matching the observed chloride plumes at 9 hours and 16 hours after tracer injection with those simulated by a flow and transport model. The best match was found for αL = 0.2 - 0.25 cm and αT/αL = 0.2. The ratio of αT/αL = 0.2 was within the range of laboratory values reported in the literature. Sensitivity analysis revealed that the tracer plume concentration and shape were more sensitive to variations in longitudinal dispersivity than to the ratio of transverse to longitudinal dispersivity. This result contrasted with findings of others, showing that the dispersivity ratio greatly affects contaminant plume shape. However, our experimental boundary conditions restricted expansion of the plume normal to the direction of flow and thus affected the parameter estimation.",

keywords = "Chloride, Dispersivity, Sensitivity analysis, Tracer test, Transport model",

author = "Kim, {Song Bae} and Jo, {Kyu Hyeok} and Kim, {Dong Ju} and Jury, {William A.}",

year = "2004",

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T1 - Determination of two-dimensional laboratory-scale dispersivities

AU - Kim, Song Bae

AU - Jo, Kyu Hyeok

AU - Kim, Dong Ju

AU - Jury, William A.

PY - 2004/9

Y1 - 2004/9

N2 - A tracer test was conducted in a laboratory chamber representing a two-dimensional aquifer to investigate the longitudinal dispersivity (L) and the ratio (T/L of transverse to longitudinal dispersivity of sandy aquifer materials. Dispersive parameters were obtained by matching the observed chloride plumes at 9 hours and 16 hours after tracer injection with those simulated by a flow and transport model. The best match was found for αL = 0.2 - 0.25 cm and αT/αL = 0.2. The ratio of αT/αL = 0.2 was within the range of laboratory values reported in the literature. Sensitivity analysis revealed that the tracer plume concentration and shape were more sensitive to variations in longitudinal dispersivity than to the ratio of transverse to longitudinal dispersivity. This result contrasted with findings of others, showing that the dispersivity ratio greatly affects contaminant plume shape. However, our experimental boundary conditions restricted expansion of the plume normal to the direction of flow and thus affected the parameter estimation.

AB - A tracer test was conducted in a laboratory chamber representing a two-dimensional aquifer to investigate the longitudinal dispersivity (L) and the ratio (T/L of transverse to longitudinal dispersivity of sandy aquifer materials. Dispersive parameters were obtained by matching the observed chloride plumes at 9 hours and 16 hours after tracer injection with those simulated by a flow and transport model. The best match was found for αL = 0.2 - 0.25 cm and αT/αL = 0.2. The ratio of αT/αL = 0.2 was within the range of laboratory values reported in the literature. Sensitivity analysis revealed that the tracer plume concentration and shape were more sensitive to variations in longitudinal dispersivity than to the ratio of transverse to longitudinal dispersivity. This result contrasted with findings of others, showing that the dispersivity ratio greatly affects contaminant plume shape. However, our experimental boundary conditions restricted expansion of the plume normal to the direction of flow and thus affected the parameter estimation.

KW - Chloride

KW - Dispersivity

KW - Sensitivity analysis

KW - Tracer test

KW - Transport model

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U2 - 10.1002/hyp.1475

DO - 10.1002/hyp.1475

M3 - Article

AN - SCOPUS:4644270004

SN - 0885-6087

VL - 18

SP - 2475

EP - 2483

JO - Hydrological Processes

JF - Hydrological Processes

IS - 13

ER -

Determination of two-dimensional laboratory-scale dispersivities

Abstract

Keywords

ASJC Scopus subject areas

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