Reference number
ISO 18320:2020
© ISO 2024
International Standard
ISO 18320:2020
Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship
Edition 1
2020-07
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Published (Edition 1, 2020)

ISO 18320:2020

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Format
CHF 173
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Abstract

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 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.

General information

  • Status
     : Published
    Publication date
     : 2020-07
    Stage
    : International Standard published [60.60]
  • Edition
     : 1
    Number of pages
     : 46
  • Technical Committee :
    ISO/TC 113/SC 1
    ICS :
    17.120.20 
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Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

15
Life on Land

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