Author(s): Mario Krzyk; Matjaz Cetina
Linked Author(s): Mario Krzyk, Matjaz Cetina
Keywords: Dam-break wave; Two-dimensional mathematical model; Orthogonalcurvilinear co-ordinates; Roughness coefficient
Abstract: The paper deals with the hydraulic aspects of the wave emerging as the result of potential dam break of the upper storage reservoir of the pumped-storage hydropower plant Kolarjev vrh. A two-dimensional depth averaged mathematical approach was used. The upper storage reservoir and its dam failure were modelled with the mathematical model PCFLOW2D, which is based on the Cartesian coordinate numerical mesh. The results of the model PCFLOW2D are given as the upper boundary condition to the mathematical model PCFLOW2DORTHOCURVE based on the orthogonal curvilinear numerical mesh. The model PCFLOW2D-ORTHOCURVE provided a tool for the analysis of flood wave flow in a steep, narrow and geometrically diversified stream channel. The application of the Rickenmann's equation was chosen, presented in a form similar to the Manning equation. For the purpose of the example given here, the equation was somewhat simplified and adapted to the data available. The roughness coefficient used at each calculation cell depended upon the slope of that cell. The results of numerical calculations are compared to the measurements carried out on the physical model in the scale of 1:200.
Year: 2009