Predictions in Ungauged Basins: Promise and Progress (Proceedings of symposium S7 held during the Seventh IAHS Scientific Assembly at Foz do Iguaçu, Brazil, April 2005). IAHS Publ. 303, 2006, 255-266.

 

A new approach for the numerical modelling of the groundwater flow in the fractured rock massifs

 

Jiří Maryška, Otto Severın, Miloslav Tauchman & David Tondr

Dept of Modelling of Processes, Technical University of Liberec, Hálkova 6, 461 17 Liberec 1, Czech Republic

otto.severyn@vslib.cz

 

Abstract A new approach to the modelling of the groundwater flow in fractured rock is presented in the paper. The empirical knowledge of the hydrogeologists is summarized first. There are three types of objects important for the groundwater flow—small fractures, which can be replaced by blocks of porous media, large deterministic fractures and lines of intersection of the large fractures. These objects are by their nature 3-D, 2-D and 1-D, respec­tively. The rest of the paper describes how to set up a numerical model representing all three types of objects. We use existing models based on the Mixed-Hybrid FEM and we connect them by equations representing the mass exchange between various types of elements. Our model uses two types of connection of the elements, the so-called compatible and incompatible types.

 

Key words  FEM; fractured rock; groundwater flow; numerical modelling