Critical Standard Normalized Rapid Suppression Hydraulic Index and Its Estimation

As a standard to by which characterize the ability of ships ascend rapidly, rapid suppression hydraulic index is main indicator regulatory effect and an important component channel engineering research. This study reviewed current determination methods forms expression revealed that existing comprehensive indices unit energy have obvious disadvantages, such as critical standards not being unified. Based on balance principle ship’s effective propulsion navigation resistance, according unified idea index, dimensionless normalized was derived. The concepts flow velocity fraction, slope fraction their combined are proposed, assessment method forming suppressing with 1 provided. Using example, we verified feasibility convenience application in judging formation reaches, obstruction areas comparison several ship types rapidly. various tested real tests theoretical analysis through dimensions, influencing factors regression analysis, introduced power load ratio established empirical formula for estimating parameters type, can provide reference determining when lacking detailed type data. scope estimated discussed. data rapids regulation provided, more convenient remediation projects, will reduces hindering then develop shipping industry mountainous rivers promote sustainable development economic construction.