Hydrodynamic Modeling in a Cascade Development River of Dongjiang Basin, South China

The river network in the Dongjiang River Basin was schematized as a one-dimensional hydrodynamic model which was solved together with either the continuity or energy equations at all river junctions for given boundary conditions. The dam of the cascaded hydro-electric station on the river was generalized to be weir or sluice gate. Preissmann weighted implicit four-point scheme and the fiver-junction-river method were used in solving the equations. Finally the discharge and water level at every section in all branches were calculated. The observed data was used to verify the model and it was found that the calculated results agreed with the observed data.