Problematic of flow in open channels. Basic algorithm and numerical operators of the hydrostatics and hydrodynamics, wave approximations, numerical methods in hydraulics and their application in the Czech Republic. The distribution of hydraulic models, according to standard criteria - number of dimensions, schematization, connectivity with GIS. Boundary and initial conditions of hydraulic models. Preprocessing of hydrodynamic model HEC-RAS and MIKE 11 in the GIS. Schematization, verification, operation and calibration of hydrodynamic models, HEC-RAS and MIKE 11. Postprocessing in GIS, visualization of flood zones. Model MIKE 21c, compared with the 1D model HEC-RAS and MIKE 11. MIKE FLOOD platform. Connectivity of hydraulic models with rainfall-runoff models and models of urban hydrology and sewer networks.