ISO 18365-2013 PDF

Full title and description

ISO 18365:2013 — Hydrometry — Selection, establishment and operation of a gauging station. Provides requirements and practical guidance for the siting, establishment, operation and maintenance of gauging stations used to measure water level (stage) and/or discharge in lakes, reservoirs, rivers, canals and other open channels.

Abstract

ISO 18365:2013 specifies requirements for establishing and running gauging stations for stage-only, stage–discharge and direct-discharge measurements in natural and artificial channels. It describes recommended measurement methods, operational procedures, maintenance, and special considerations for difficult conditions (for example ice-covered conditions), with the objective of producing reliable stage and discharge data for hydrological and water-management applications.

General information

• Status: Published (International Standard, confirmed).
• Publication date: December 2013 (edition 1, 6 December 2013).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.120.20 (Hydrometry; flow in open channels).
• Edition / version: Edition 1 (2013).
• Number of pages: 17 (official ISO published text).

Scope

Gives requirements for the selection of gauging-station sites and for the establishment, instrumentation, operation and maintenance of gauging stations used to measure stage or stage and discharge in lakes, reservoirs, rivers, canals and other artificial open channels. Covers stage-only stations, stage–discharge stations, direct-discharge measurement in natural channels and stage–discharge stations with artificial structures; includes requirements and recommendations for measurements under difficult conditions (e.g., ice), and for the proper management of measurement records and metadata.

Key topics and requirements

• Guidance on site selection to ensure representative hydraulic conditions and safety of installations.
• Requirements for types of gauging stations: stage-only, stage–discharge and direct-discharge.
• Instrument selection, installation and protection (staff gauges, floats, pressure sensors, acoustic/ultrasonic sensors, weirs, flumes, instrumentation for discharge measurement).
• Procedures for establishing stage–discharge relationships (rating curves), cross-section surveys and velocity/discharge measurements.
• Operation and maintenance practices, routine checks, calibration and inspection schedules.
• Special procedures for difficult conditions (ice, debris, unstable banks, fluctuating backwater) and for artificial structures.
• Recordkeeping, metadata, quality control and data validation to ensure traceability and reliable hydrometric datasets.

Typical use and users

Used by national and regional hydrological services, water-resource and reservoir managers, environmental agencies, civil engineers, dam operators, consultants and researchers who design, install or operate gauging stations and who need standardised methods for reliable stage and discharge measurements and associated metadata.

Related standards

Replaces or supersedes earlier ISO documents on similar topics (for example ISO 1100-1:1996 and ISO/TR 8363:1997 were previously related). National/adopted versions exist (e.g., BS EN ISO 18365). Related hydrometry standards and technical reports from ISO/TC 113 and CEN/TC 318 address specific measurement techniques, instrumentation calibration and discharge measurement methods.

Keywords

hydrometry, gauging station, stage, discharge, flow measurement, rating curve, hydrological monitoring, installation, maintenance, ice conditions, open channels

FAQ

Q: What is this standard?

A: ISO 18365:2013 is an international standard that sets requirements and guidance for the selection, establishment, operation and maintenance of gauging stations for measuring stage and/or discharge in lakes, reservoirs, rivers, canals and other open channels.

Q: What does it cover?

A: It covers the siting of stations, types of gauging installations (stage-only, stage–discharge, direct discharge), instrumentation choices, methods for developing stage–discharge relationships, operational procedures, maintenance, quality control and special conditions such as ice.

Q: Who typically uses it?

A: Hydrological and water-resource professionals — national hydrological services, river basin authorities, reservoir/dam operators, environmental agencies, consultants and researchers involved in flow measurement and hydrometric network operation.

Q: Is it current or superseded?

A: ISO 18365 was published in December 2013 (edition 1) and is listed as a published International Standard; the ISO record indicates the standard has been reviewed/confirmed in subsequent five‑year reviews (stage 90.93). Users should check their national standards body for any national adoptions or more recent amendments.

Q: Is it part of a series?

A: It sits within ISO/TC 113 (Hydrometry) work and relates to other hydrometry standards and technical reports that address specific measurement methods, calibration and data quality; it also replaces or updates content previously covered in ISO 1100-1:1996 and ISO/TR 8363:1997.

Q: What are the key keywords?

A: Hydrometry, gauging station, stage, discharge, rating curve, flow measurement, open channel, instrumentation, maintenance, quality control.