Monitoring Hydraulic Gradient Using Three-Point Estimator
Publication: Journal of Environmental Engineering
Volume 124, Issue 6
Abstract
A new method is discussed for garnering information from water level data. Using measured water level data, a series of local estimates of the hydraulic gradient are generated. By combining these estimates through a series of plots, significant insight can be gained regarding the regional gradient and local variability in the gradient. Utility of this approach for monitoring gradients and temporal changes in the gradient is discussed through application to experimental results from a constructed aquifer, field results from a site in northern Indiana, and numerical simulation. In each case, the estimator provided a measure of the regional gradient and local deviation from this regional gradient. It is shown that the shape of the plots generated is related to errors in measurement and local anomalies in the hydraulic gradient. It is suggested that the shape of the plot also provides insight into the relative scales of the measurement and the integral scale of the underlying transmissivity field.
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References
1.
Cole, B., and Silliman, S. (1996). “Estimating the horizontal gradient in heterogeneous, unconfined aquifers: comparison of three-point schemes.”Ground Water Monitoring and Remediation, Spring, 84–91.
2.
Dagan, G. (1986). “Statistical theory of groundwater flow and transport: pore to laboratory, laboratory to formation, and formation to regional scale.”Water Resour. Res., 22(9), 120S–134S.
3.
Fetter, W. C. (1994). Applied hydrogeology. 3rd Ed., Macmillan College Publishing, New York, N.Y.
4.
“Focused feasibility report, Douglas Road Landfill, Mishawaka, Indiana.” (1995). WA No. 65-5L2H/Contract No. 68-W8-0040, CH2M-Hill.
5.
Freeze, A.(1975). “A stochastic-conceptual analysis of one-dimensional groundwater flow in nonuniform homogeneous media.”Water Resour. Res., 11(5), 725–741.
6.
Gelhar, L. W., and Axness, C. L.(1983). “Three-dimensional stochastic analysis of macrodispersion in aquifers.”Water Resour. Res., 19(1), 161–180.
7.
Harvey, C. F., and Gorelick, S. M.(1995). “Mapping hydraulic conductivity: sequential conditioning with measurements of solute arrival time, hydraulic head, and local conductivity.”Water Resour. Res., 31(7), 1615–1626.
8.
McDonald, M. G., and Harbaugh, A. W. (1988). “A modular three-dimensional finite-difference ground-water flow model.”U.S. Geological Survey Techniques of Water Resources Investigations, Book 6, Chapter A1.
9.
Neuman, S. P., and Orr, S.(1993). “Prediction of steady state flow in nonuniform geologic media by condition moments: exact nonlocal formalism, effective conductivities, and weak approximation.”Water Resour. Res., 29(2), 341–364.
10.
Poeter, E. P., and McKenna, S. A.(1995). “Reducing uncertainty associated with ground-water flow and transport predictions.”Ground Water, 33(6), 899–904.
11.
Silliman, S. E., and Wright, A. L.(1991). “Generation of random fields characterized by discrete regions of constant value.”Appl. Mathematics and Computation, 45, 293–311.
12.
Sudicky, E. A.(1986). “A natural gradient experiment on solute transport in a sand aquifer: spatial variability of hydraulic conductivity and its role in the dispersion process.”Water Resour. Res., 22(13), 2069–2082.
13.
Yeh, W. W.-G.(1986). “Review of parameter identification procedures in groundwater hydrology: the inverse problem.”Water Resour. Res., 22(2), 95–108.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 124 • Issue 6 • June 1998
Pages: 517 - 523
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Jun 1, 1998
Published in print: Jun 1998
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