Geophysical data integration and conditional uncertainty analysis on hydraulic conductivity estimation
By: A. Rahman, F.T.-C. Tsai, C.D. White, D.A. Carlson, and C. S. Willson
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Abstract
Integration of various geophysical data is essential to better understand aquifer heterogeneity. However, data integration is challenging because there are different levels of support between primary and secondary data needed to be correlated in various ways. This study proposes a geostatistical method to integrate the hydraulic conductivity measurements and electrical resistivity data to better estimate the hydraulic conductivity (K) distribution. The K measurements are obtained from the pumping tests and represent the primary data (hard data). The borehole electrical resistivity data from electrical logs are regarded as the secondary data (soft data). The electrical resistivity data is used to infer hydraulic conductivity values through the Archie law and Kozeny-Carman equation. A pseudo cross-semivariogram is developed to cope with the resistivity data non-collocation. Uncertainty in the auto-semivariograms and pseudo cross-semivariogram is quantified. The methodology is demonstrated by a real-world case study where the hydraulic conductivity is estimated in the Upper Chicot aquifer of Southwestern Louisiana. The groundwater responses by the cokriging and cosimulation of hydraulic conductivity are compared using analysis of variance (ANOVA). ?? 2007 ASCE.
Suggested Citation
Rahman, A., Tsai, F., White, C., Carlson, D., Willson, C.S., 2007, Geophysical data integration and conditional uncertainty analysis on hydraulic conductivity estimation, in Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006, Omaha, NE, 21 May 2006 through 25 May 2006, https://doi.org/10.1061/40856(200)128.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Geophysical data integration and conditional uncertainty analysis on hydraulic conductivity estimation |
| ISBN | 0784408564; 9780784408568 |
| DOI | 10.1061/40856(200)128 |
| Publication Date | April 26, 2012 |
| Year Published | 2007 |
| Language | English |
| Larger Work Title | Examining the Confluence of Environmental and Water Concerns - Proceedings of the World Environmental and Water Resources Congress 2006 |
| Conference Title | World Environmental and Water Resources Congress 2006: Examining the Confluence of Environmental and Water Concerns |
| Conference Location | Omaha, NE |
| Conference Date | 21 May 2006 through 25 May 2006 |