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- W1497544215 abstract "A number of conceptual models have been proposed for simulating groundwater flow and solute transport in fractured systems. They span the range from continuum porous equivalents to discrete channel networks. The objective of this paper is to show the application of an intermediate approach (mixed discrete-continuum models) to three cases. The approach consists of identifying the dominant fractures (i.e., those carrying most of the flow) and modeling them explicitly as two-dimensional features embedded in a three-dimensional continuum representing the remaining fracture network. The method is based on the observation that most of the water flows through a few fractures, so that explicitly modeling them should help in properly accounting for a large portion of the total water flow. The applicability of the concept is tested in three cases. The first one refers to the Chalk River Block (Canada) in which a model calibrated against a long crosshole test successfully predicted the response to other tests performed in different fractures. The second case refers to hydraulic characterization of a large-scale (about 2 km) site at El Cabril (Spain). A model calibrated against long records (five years) of natural head fluctuations could be used to predict a one-month-long hydraulic test and heads variations after construction of a waste disposal site. The last case refers to hydraulic characterization performed at the Grimsel Test Site in the context of the Full-scale Engineered Barrier EXperiment (FEBEX). Extensive borehole and geologic mapping data were used to build a model that was calibrated against five cross-hole tests. The resulting large-scale model predicted steady-state heads and inflows into the test tunnel. The conclusion is that, in all cases, the difficulties associated with the mixed discrete-continuum approach could be overcome and that the resulting models displayed some predictive capabilities." @default.
- W1497544215 created "2016-06-24" @default.
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- W1497544215 date "2000-01-01" @default.
- W1497544215 modified "2023-10-16" @default.
- W1497544215 title "Mixed discrete-continuum models: A summary of experiences in test interpretation and model prediction" @default.
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- W1497544215 doi "https://doi.org/10.1029/gm122p0251" @default.
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