液体比重测定法.潮汐条件下明渠液流的测量

[中文适用范围]： 本国际标准总结了确定潮汐通道中液体流量的推荐方法，特别考虑了那些独特的或特别适合潮汐条件下应用的技术，包括不确定性的处理。 在适当的情况下，还参考了确定非潮汐河道流量的方法，但要注意它们在实用性和/或不确定性方面的局限性。 本国际标准没有描述替代方法，例如堰、水槽、稀释测量、盐速和浮子的使用，尽管它们在某些条件下可能是合适的，特别是在潮汐作用仅阻碍而不是停止或逆转的情况下。 水流的通过。 这些方法在其他国际标准中有详细描述。 本国际标准规定了两种类型的技术： a) 潮汐流单次测量技术； b) 潮汐流连续测量技术。 附录 A 规定了体积测量方法。 附件 B 规定了潮汐条件下流量的确定方法，附件 C 给出了单个垂线的计算示例。 对于其他垂直领域也可以进行类似的计算。 附件 D 描述了使用声学多普勒速度计测定潮汐流。 [外文原描述]： ISO 2425:2010 provides a summary of recommended methods for the determination of liquid flow in tidal channels, special consideration being given to those techniques that are either unique to or particularly appropriate for application under tidal conditions, including treatment of uncertainties. Reference is also made, where appropriate, to methods for the determination of flow in non-tidal channels, but attention is drawn to their limitations with respect to practicality and/or uncertainty. ISO 2425:2010 does not describe alternative methods, such as the use of weirs, flumes, dilution gauging, salt velocity and floats, although they might be suitable under certain conditions, especially where the effect of tides only impedes and does not stop or reverse the passage of stream flow. These methods are described in detail in other International Standards. ISO 2425:2010 specifies two types of technique: techniques for single measurements of tidal flow; techniques for continuous measurement of tidal flow. Annex A specifies the cubature method of measurement. Annex B specifies methods for the determination of flow under tidal conditions, and Annex C gives an example of the computation for a single vertical. Similar computations are possible for other verticals. Annex D describes the determination of tidal flow using an acoustic Doppler velocity meter.