1.1 本试验方法包括使用帕歇尔水槽测量明渠中水和废水的体积流量。 1.1.1 ISO 1438和ISO 4359中提供了与本试验方法相关的信息。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 水槽设计适用于1英寸的喉部尺寸。（2.54厘米）至50英尺（15.2米），最大流量为0.2至3000英尺 3. /s（0.0057至85米 3. /s） ( 1. ) 和 ( 2. ) . 4. 因此，它们可以应用于各种流量，水头损失适中。 5.2 水槽具有自清洁功能，可进行适度的固体运输，因此适用于废水和含有沉积物的水流。

1.1 This test method covers measurement of the volumetric flowrate of water and wastewater in open channels with the Parshall flume. 1.1.1 Information related to this test method can be found in ISO 1438 and ISO 4359. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Flume designs are available for throat sizes of 1 in. (2.54 cm) to 50 ft (15.2 m) which cover maximum flows of 0.2 to 3000 ft 3 /s (0.0057 to 85 m 3 /s) ( 1 ) and ( 2 ) . 4 They can therefore be applied to a wide range of flows, with head losses that are moderate. 5.2 The flume is self-cleansing for moderate solids transport and therefore is suited for wastewater and flows with sediment.