In this study, we propose a flow velocity evaluation scheme based on pressure measurement in pressurized pipeline
systems. Conservation of mass and momentum equations can be decomposed into mean and perturbation of pressure
head and flowrate, which provide the pressure head and flowrate relationship between upstream and donwstream point
in pressurized pipeline system. The inverse impedance formulations were derived to address measured pressure at downstream
to evaluation of flow velocity or pressure at any point of system. The convolution of response function to pressure head
in downstream valve provides the flow velocity response in any point of the simple pipeline system. Simulation comparison
between traditional method of characteristics and the proposed method provide good agreements between two distinct
approaches.