Measurement of water flow in open channels Part 4: Measurement using flow gauging structures, Method 4.1: Thin-plate weirs
明渠水流测量第4部分:使用流量测量结构进行测量方法4.1:薄板堰
Specifies methods for the measurement of water flow in open channels using rectangular and triangular-notch (V-notch) thin-plate weirs. The flow conditions considered are limited to steady, free and fully ventilated discharge. It also specifies limitations of applicability related to weir and flow geometry for the recommended equations. It is technically identical with and reproduced from ISO 1438-1:1980.