Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship
|Publication Date:||1 July 2020|
|ICS Code (Flow in open channels):||17.120.20|
This document specifies methods of determining the stage-discharge relationship for gauging stations. It specifies an accuracy for defining the stage-discharge relationship based on a sufficient number of discharge measurements, complete with corresponding stage measurements.
This document considers stable and unstable channels and includes brief descriptions of the effects on the stage-discharge relationship of the transition from inbank to overbank flows, shifting controls, variable backwater and hysteresis. Methods of determining discharge for twin-gauge stations, ultrasonic velocity-measurement
NOTE These types of rating curves are described separately in other International Standards, Technical Specifications and Technical Reports, which are listed in the Bibliography.