Theory and verification for the GRASP II code for adjoint-sensitivity analysis of steady-state and transient ground-water flow
- INTERA, Inc., Austin, TX (USA)
Calibration of a numerical model of the regional ground-water flow in the Culebra dolomite at the Waste Isolation Pilot Plant in southeastern New Mexico, has been performed by an interative parameter-fitting procedure. Parameterization has been secured by choosing to assign the transmissivity values at a limited number of selected locations, designated as pilot points. The transmissivity distribution in the model is derived by kriging the combined pool of measured and pilot-plant transmissivities. Iterating on the twin steps of sequentially adding additional pilot point(s) and kriging leads to the model of required accuracy, as judged by a weighted least-square-error objective function. At the end of calibration, it must be ensured that the correlation structure of the measured transmissivities is broadly preserved by the pilot-plant transmissivities. Adjoint-sensitivity analysis of the model has been coupled with kriging to provide objectively the optimal location of the pilot points during an iteration. The pilot-point transmissivities have been adjusted by modeler's judgement incorporating information, where available, on local geologic conditions and large-scale hydraulic interference tests, in order to minimize the objective function. 43 refs., 5 figs., 5 tabs.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); INTERA, Inc., Austin, TX (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6293179
- Report Number(s):
- SAND-89-7143; ON: DE91007499
- Country of Publication:
- United States
- Language:
- English
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99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
FLUID FLOW
G CODES
GROUND WATER
FLOW MODELS
CALIBRATION
DOLOMITE
KRIGING
PERMEABILITY
SENSITIVITY ANALYSIS
STEADY-STATE CONDITIONS
WIPP
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
COMPUTER CODES
FUNCTIONAL MODELS
HYDROGEN COMPOUNDS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MATHEMATICAL MODELS
MATHEMATICS
MINERALS
NATIONAL ORGANIZATIONS
NUCLEAR FACILITIES
OXYGEN COMPOUNDS
PILOT PLANTS
RADIOACTIVE WASTE FACILITIES
STATISTICS
UNDERGROUND FACILITIES
US DOE
US ORGANIZATIONS
WATER
540210* - Environment
Terrestrial- Basic Studies- (1990-)
990200 - Mathematics & Computers
052002 - Nuclear Fuels- Waste Disposal & Storage