1.1 本指南涵盖了用于确定移动液体输送的沉积物排放量的采样设备和基本程序。设备和程序最初用于对河流运输的矿物沉积物进行采样，但它们适用于对明渠或封闭管道中运输的各种沉积物进行采样。程序不适用于通过浮选运输的沉积物。 1.2 本指南不直接适用于确定非放电加权浓度的采样，在特殊情况下，这是有意义的。然而，关于采样器要求和泥沙运移现象的许多描述性信息适用于这些浓度的采样，并且 9.2.8 和 13.1.3 简要说明合适的设备。 今后将添加有关此主题的更多信息。 1.3 引用的参考文献未作为标准汇编；然而，它们确实包含有助于确保设备和程序的标准设计的信息。 1.4 本指南中提供的用于确定推移质流量的采样信息仅为描述性信息，因为目前没有任何特定的采样设备或程序被认为是最先进的代表。随着这种情况的变化，将在本指南中添加详细信息。 1.5 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。 第节给出了具体的预防说明 12 . 1.6 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====== 4.1 本指南为一般性指南，旨在作为规划指南。为了满意地对特定地点进行采样，研究人员有时必须设计新的采样设备或修改现有设备。由于运输过程的动态性质，质量浓度和颗粒- 样本中尺寸分布的准确表示取决于采集方法。泥沙流量在时间和空间上都是高度可变的，因此需要使用正确设计的设备正确采集大量样本，以提供流量计算数据。讨论了时间和空间变化的一般性质。

1.1 This guide covers the equipment and basic procedures for sampling to determine discharge of sediment transported by moving liquids. Equipment and procedures were originally developed to sample mineral sediments transported by rivers but they are applicable to sampling a variety of sediments transported in open channels or closed conduits. Procedures do not apply to sediments transported by flotation. 1.2 This guide does not pertain directly to sampling to determine nondischarge-weighted concentrations, which in special instances are of interest. However, much of the descriptive information on sampler requirements and sediment transport phenomena is applicable in sampling for these concentrations, and 9.2.8 and 13.1.3 briefly specify suitable equipment. Additional information on this subject will be added in the future. 1.3 The cited references are not compiled as standards; however they do contain information that helps ensure standard design of equipment and procedures. 1.4 Information given in this guide on sampling to determine bedload discharge is solely descriptive because no specific sampling equipment or procedures are presently accepted as representative of the state-of-the-art. As this situation changes, details will be added to this guide. 1.5 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. Specific precautionary statements are given in Section 12 . 1.6 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 ====== 4.1 This guide is general and is intended as a planning guide. To satisfactorily sample a specific site, an investigator must sometimes design new sampling equipment or modify existing equipment. Because of the dynamic nature of the transport process, the extent to which characteristics such as mass concentration and particle-size distribution are accurately represented in samples depends upon the method of collection. Sediment discharge is highly variable both in time and space so numerous samples properly collected with correctly designed equipment are necessary to provide data for discharge calculations. General properties of both temporal and spatial variations are discussed.