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Indicator Variography for Spatial Characterization of Aquifer Heterogeneities

by M. V. Cromer, James M. Montgomery, Inc, Walnut Creek, United States,
R. M. Srivastava, James M. Montgomery, Inc, Walnut Creek, United States,



Document Type: Proceeding Paper

Part of: Water Resources Planning and Management: Saving a Threatened Resource?In Search of Solutions

Abstract:

The qualitative information or soft data from lithologic descriptions is processed using a state-of-the-art geostatistical approach to delineate, with quantified uncertainty, the extent of paleo-channel features within a complex alluvial basin in Northern California. These well connected fluvial channel features composed of coarse gravels and sands provide preferential conduits for groundwater flow in this basin by altering regional flow velocity fields with their dominating transmissivities. An accurate groundwater flow model must incorporate knowledge of the location and degree of connectedness of these features. The geostatistical techniques of indicator variography and ordinary kriging provide the tools to attain this knowledge.

Subject Headings: Groundwater flow | Mathematical models | Spatial data | Spatial analysis | Model accuracy | Kriging | Heterogeneity | California | United States

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