Study Of Influences Of Hydroelectric Power Station's Unsteady Flow On Navigation In Downstream

Many navigable channels in our country are affected not only the mutation of water level of flood and dry weather, but also other factors. For example, the hydroelectric power station in upstream. Because of the regulation of hydroelectric power station, there are infinite influences on navigation in downstream. The study of hydraulic grade line is an important project in navigation engineering. We mostly adopted the measure of steady flow and rarely adopted the unsteady one in the past. It is of great importance for Numerical Simulation Study of influences of hydroelectric power station's unsteady flow on navigation in downstream. It not only insure the safety of navigation and avoid the accident of water carriage, but also afford new technical support for theory study in channel improvement. The text link the navigation improvement porject of the Yellow River —from Si Long to Long Wan. Adopted the research methods of references summarization, theoretical analysis and numerical modeling, systematical study the influences of hydroelectric power station on navigation in downstream.The model adapting to one-dimensional unsteady flow of long river and long time is founded, which based on the Preissmann implicit identifier method, applying the model to the unsteady process of the Yellow River —from Si Long to Long Wan. The calculated water level approximately tallied with the recorded one. So the model can accurately reflect the unsteady flow and establish foundation for Numerical Simulation of influences of hydroelectric power station's unsteady flow on navigation in downstream Adopted the one-dimensional unsteady flow model in the project, the variational rules of four different inflow instances on navigation in downstream are studied, those can provide the study of navigable channels with base data.Based on the study of the unsteady flow of the Yellow River —from Si Long to Long Wan, extending the study of unsteady flow of hydroelectric power station and analyzing in-depth influences of daily regulation of hydroelectric power station's unsteady flow on navigation in downstream.The research of the influences of hydroelectric power station's unsteady flow on navigation in downstream is just a primary try and exploration, affording use for reference and influencing the further research about these.