NF ISO 9123

NF ISO 9123

January 2019
Standard Current

Hydrometry - Stage-fall-discharge relationships

ISO 9123:2017 specifies methods for determining stage-fall-discharge relationships for a stream reach where variable backwater occurs either intermittently or continuously. Two gauging stations, a base reference gauge and an auxiliary gauge are required for gauge height measurements. A number of discharge measurements are required in order to calibrate the rating to the accuracy required by this document.The preparation of rating curves is not described in detail in this document.NOTE For a more detailed description of preparing rating curves, see the methods described in ISO 1100‑2.

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Main informations

Collections

National standards and national normative documents

Publication date

January 2019

Number of pages

35 p.

Reference

NF ISO 9123

ICS Codes

17.120.20   Flow in open channels

Classification index

X10-304

Print number

1

International kinship

ISO 9123:2017
Sumary
Hydrometry - Stage-fall-discharge relationships

ISO 9123:2017 specifies methods for determining stage-fall-discharge relationships for a stream reach where variable backwater occurs either intermittently or continuously. Two gauging stations, a base reference gauge and an auxiliary gauge are required for gauge height measurements. A number of discharge measurements are required in order to calibrate the rating to the accuracy required by this document.

The preparation of rating curves is not described in detail in this document.

NOTE For a more detailed description of preparing rating curves, see the methods described in ISO 1100‑2.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Symboles et abréviations
  • 5 Considérations générales
  • 6 Méthode de la dénivelée unitaire
  • 7 Méthode de la dénivelée constante
  • 8 Méthode de la dénivelée variable
  • 9 Courbes et barèmes de tarage
  • 10 Méthode de calcul
  • 11 Vérification périodique des courbes hauteur-dénivelée-débit
  • 12 Extrapolations
  • 13 Évaluation de l'incertitude associée à la relation hauteur-dénivelée-débit
  • Annexe A Régression multiple par la méthode des moindres carrés - Représentation matricielle
  • Bibliographie
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