Study on Advanced Water Level Simulation Method for Inland Waterway Transport Based on the Extended Manning Formula

Abstract The water level is a critical hydraulic parameter for inland ship safe navigation, as well an important variable in waterway transport minoring and assistant systems. As basic traditional method, the one-dimensional (1D) hydrodynamic model adapted to simulate river sections/waterway segments obtain levels numerically. However, friction factor, i.e., Manning’s coefficient n, sensitive 1D model. Its calibration or identification not only very time-consuming but also unpractical. Due its sensitivity simulation results, usually, one identified cannot be adopted into other flow scenarios. It has been concluded that unfitness of empirical quasi-steady formulae leads these consequences/phenomena. Besides finding advanced algorithms updating parameters dynamically, employing true unsteady formula replace thorough solution problem. In this study, we introduced newly proposed momentum equation Saint-Venant Equations, thus modified was developed. To validate capability simulating levels, Xia-la-xian – La-he-lian section Daying River; compared with Manning formula. Results showed performs better both cross-sectional average velocity simulation. research results can used support construction intelligent warning systems, shipping, digital transportation platforms.