This paper presents the orientations, sizes, intensity, spatial locations and transmissivity of fractures at different scales in two hydraulic domains: 1) more transmissive zones, and 2) less transmissive blocks. Based on the evaluation of these properties, a conceptual model has been developed for the fracture system. The hydrostructural concept suggests that the complexity of fracture orientation and intensity increases with distance from more transmissive zones to less transmissive blocks but fracture size and transmissivity decrease. It also suggests that these parameters vary continuously between different hydraulic domains and that different parameters are strongly intercorrelated.
The complex interpretation of the fracture system studied can provide direct inputs for hydrogeological models, but can also provide conceptual information for the development of the geosphere module in safety calculations.
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