Complex flow system model of the Muszyna region (Beskid Sądecki range, Polish Outer Carpathians)

Multilayered Muszyna regional model was constructed in the ArcGIS and the GMS environment. Among the several methods for implementing the model in the GMS system the LPF method was used to create a structure of the model. Conceptual model is a spatial arrangement of the fixed structure, which can be automatically divided in grid blocks of different densities. The studied area is located within an open hydrogeological structure in the Carpathian mountain basin. Regional model takes into account the presence of complex fold and fault structures as well as the interaction between groundwater, and surface water as well as fresh water with mineral water. Within the model were separated 10 layers with different hydrogeological characteristics. The first layer includes Pleistocene–Holocene deposits. All other layers are built of fissured-porous flysch rocks. The hydraulic conductivities in studied flysch rocks decreases exponentially with depth. The most permeable subsurface zone is about 100 m thick. The experience gained from modelling for the Muszyna region show effectiveness of the principles of the creation of regional hydrogeological models. Such a quasi 3D model seems to be a good tool to carry out the rational exploitation of fresh and mineral water in a complex groundwater flow system.