[en] An experimental and theoretical study dealing with 'scale effect' on hydraulic and transport parameters in a fractured rock mass was carried out in the granitic site at Fanay-Augeres. The study is divided into two phases. Phase 2A: experimental study and modelling of groundwater flows (respectively volume 1 and volume 2). Phase 2 B: experimental study and modelling of tracer tests (respectively volume 3 and volume 4); determination of the in-situ state of stress in the rock mass (volume 5). This study is part of the coordinated project MIRAGE (radionuclide migration in the geosphere), research subject matter number 4 hydrogeology