Evaluation of uncertainties due to hydrogeological modeling and groundwater flow analysis [electronic resource] : Effective continuum model using TOUGH2

Published:: Berkeley, Calif. : Lawrence Berkeley National Laboratory, 2001.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:: vp : digital, PDF file
Additional Creators:: Lawrence Berkeley National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Starting with regional geographic, geologic, hydrologic, geophysical, and meteorological data, we develop an effective continuum model to simulate subsurface flow and transport in a 4 km by 6 km by 3 km thick fractured granite rock mass overlain sedimentary layers. Individual fractures are not modeled explicitly. Rather, continuum permeability and porosity distributions are assigned stochastically, based on well-test data and fracture density measurements. Large-scale features such as lithologic layering and major fault zones are assigned deterministically. We employ the TOUGH2 simulator for the flow calculation. The model simulates the steady-state groundwater flow through the site, then streamline analysis is used to calculate travel times for particles leaving specified monitoring points to reach the boundary of the model. Model results for the head distribution compare favorably with head profiles measured in several deep boreholes and the overall groundwater flow is consistent with regional water balance data. Predicted travel times range from 1 to 25 years.

Report Numbers:

E 1.99:lbnl--48151
lbnl--48151

Subject(s):

Geosciences

Other Subject(s):

Note:

Published through SciTech Connect.
07/13/2001.
"lbnl--48151"
Karasaki, Kenzi; Doughty, Christine.
Japan Nuclear Fuel Cycle Corporation, Taisei Corporation of Japan (US)

Type of Report and Period Covered Note:

Topical;

Funding Information:

AC03-76SF00098
80HP01

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