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Problémy a modely v předpovídání záplav
Hokr, Milan ; Maryška, Jiří ; Šotner, O.
In the paper, we deal with the flood forecasting, in particular with determining the water flow as result of known precipitation. In the first part, we present several approaches how to express the water flow in the environment concluding underground flow, surface flow and channel flow in the ricer system (water runoff and flood routing). We discuss possibilities to simplify the shallow-water equations for slowly varying flow to either potential flow or advection-dispersion process. On the second part, we present results of two example models of 2D surface flow in the landscape, first based on the advection-dispersion representation of surface flow and the second mixed-hybrid FEM model based on potential flow approximation.
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New Explicit Design Relations for PI Control Tested on Real Models
Klán, Petr ; Gorez, R.
New explicit design relations are proposed for setting the parameters of PI controllers, from the knowledge of three parameters: gain, average residence time, and normalized dead time, characterizing the process to be controlled. These parameters can be obtained from process step response or from the closed-loop response with any stabilizing PI controller.
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