【国外标准】 Standard Test Method for Determination of the Horizontal Water Flow Rate of a Geosynthetic Screening Material, Product, or Device

5.1 The test method simulates the flow conditions (without sediment) applicable to sediment retention devices exposed to sheet-flow runoff. Horizontal flow rate is an inherent (index) property of sediment retention devices (SRDs), and can be used to control quality and to assess the effects of product changes.1.1 This test method covers test procedures for determining the horizontal water flow rate through a geosynthetic or geosynthetic-enhanced screening device, such as a sediment retention device (SRD), under a constant-head pressure. The test is conducted with potable water.1.2 This test is intended to be used for quality control and product development efforts, but should not be considered a performance test.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.1.4 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.1.5 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.