Pressure monitoring provides valuable insights for managing water supply systems by
tracking time-dependent hydraulic transients. In this study, we report on two pressure-monitoring
issues?sampling location and sampling interval?by analyzing a valve-induced transient event that
was not recorded in the supervisory control and data acquisition (SCADA) system of a real water
transmission line in the south of Korea. Field measurement data show that the measured magnitude of
pressure is influenced by the sampling location, which depends on pipe connectivity and distance from
automatic control valve, and by the sampling interval, which is sensitive to network size for wave
propagation. Based on the findings of the field experiments, a pressure-measurement method is
proposed by employing numerical transient simulation and spectral analysis of pressure waves.
