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Homepage>BS Standards>17 METROLOGY AND MEASUREMENT. PHYSICAL PHENOMENA>17.120 Measurement of fluid flow>17.120.20 Flow in open channels>BS ISO 18320:2020 Hydrometry. Measurement of liquid flow in open channels. Determination of the stage-discharge relationship
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immediate downloadReleased: 2020-08-13
BS ISO 18320:2020 Hydrometry. Measurement of liquid flow in open channels. Determination of the stage-discharge relationship

BS ISO 18320:2020

Hydrometry. Measurement of liquid flow in open channels. Determination of the stage-discharge relationship

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Standard number:BS ISO 18320:2020
Pages:56
Released:2020-08-13
ISBN:978 0 580 98778 6
Status:Standard
DESCRIPTION

BS ISO 18320:2020


This standard BS ISO 18320:2020 Hydrometry. Measurement of liquid flow in open channels. Determination of the stage-discharge relationship is classified in these ICS categories:
  • 17.120.20 Flow in open channels

This document specifies methods of determining the stage–d ischarge 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 stations and other complex rating curves are not described in detail.

NOTE

These types of rating curves are described separately in other International Standards, Technical Specifications and Technical Reports, which are listed in the Bibliography.