标准编号：ISO 18320:2020
中文名称：水文测量 明渠中液体流量的测量 阶段流量关系的测定
英文名称：Hydrometry — Measurement of liquid flow in open channels — Determination of the stage–discharge relationship
发布日期：2020-07
标准范围
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.
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