Hydrology and Hydraulic Properties of a Bedded Evaporite Formation Page: 4 of 48
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permeability created or enhanced by excavation effects. Inferred values of permeability cannot
be separated from their associated flow dimensions. Therefore, numerical models of flow and
transport should include heterogeneity that is structured to provide the same flow dimensions as
are observed in hydraulic tests. Modeling of the Salado Formation around the WIPP repository
should also include coupling between hydraulic properties and the evolving stress field because
hydraulic properties change as the stress field changes. RECEIVED
tOV 3 210
C S T I
1. Introduction
The hydrology of evaporate deposits is generally little studied and is poorly understood. The
Permian Salado Formation in the Delaware Basin of New Mexico is one of the most extensively
studied evaporate deposits in the world because it is the host formation for the Waste Isolation
Pilot Plant (WIPP), a repository for transuranic wastes generated by the United States' defense
programs. As part of WIPP site characterization, geologic and hydrologic studies of the Salado
have been conducted since the mid-1970's. In the following paper, we describe our conceptual
model for Salado hydrology and discuss the data that have been used to develop that model. We
consider both the hydrology of the Salado in the far field, unaffected by the presence of the
WIPP excavations, and in the near field or disturbed rock zone (DRZ) around the repository. We
also discuss aspects of the conceptual model that are important to include in numerical models of
Salado hydrology.2
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Beauheim, Richard L. & Roberts, Randall M. Hydrology and Hydraulic Properties of a Bedded Evaporite Formation, article, November 27, 2000; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc718569/m1/4/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.