Automatic Calibration of 3D Finite Differences Model Parameters— Application to the Finnsjon Site (Sweden)

by Jean Schwartz, BRGM, Orleans, France,
Lionel Dewiere, BRGM, Orleans, France,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1993


Calibration of 3D finite difference model parameters is usually carried out using a noon-automatic 'manual' procedure until observed heads, for instance, are simulated with a sufficient accuracy. Initial values of parameters (K and SS) are often the results of pumping test interpretation when available. This paper concerns an automatic method of calibrating K and S-S/ parameters on observed head variations and its application to the FINNSJON site in Sweden. This site is one of the INTRAVAL cases and the corresponding results have been presented at the INTRAVAL San Antonio meeting in November 1992. After simplification of the actual fracture field to define global K and SS equal value areas, 3-D simulations show a good agreement between observed and calculated drawdowns for the 5 observation boreholes.

Subject Headings: Three-dimensional models | Calibration | Automation and robotics | Parameters (statistics) | Model accuracy | Simulation models | Pumping tests | Finite difference method | Sweden | Europe

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