水文测量.水位、落差、流量的关系

[中文适用范围]： 本文件规定了确定断断续续或连续发生可变回水的河段水位-落差-流量关系的方法。 测量标距高度需要两个测量站、一个基准参考标尺和一个辅助标尺。 为了将额定值校准到本文件要求的精度，需要进行多次放电测量。 本文件中没有详细描述评级曲线的准备。 注：有关准备额定值曲线的更详细说明，请参阅 ISO 1100-2 中描述的方法。 [外文原描述]： 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.