宽带声学多普勒技术用于灌区量水

在美国加利福尼亚州Imperial灌区进行了便携式微型ADCP现场试验，并采用河流型ADCP同步比测。微型ADCP六次实测流量相对标准差仅为1.22 %。在该灌渠试验条件下，微型ADCP单次流量测验随机不确定度仅为1.75%，达到国家规范一类精度水文站高水位级允许总随机不确定度指标。试验和分析结果表明，微型ADCP精度高、使用方便，比河流型ADCP更适合灌区量水，可以取代传统流速仪作为率定或校核其它灌区量水方法的标准仪器。

Experimental Study on Application of Broadband Acoustic Doppler Technique in Irrigation Flow Measurement (Ⅰ)——Potable Micro-ADCP Flow Measurement

Field test of a portable micro-ADCP was conducted at the Imperial Irrigation District, California, and compared concurrently with a river ADCP measurement. The relative standard deviation of the six micro-ADCP flow measurements was only 1.22%. The random uncertainty of a single micro-ADCP flow measurement is only 1.75% under the canal test conditions, which meets the first class hydrology station total random uncertainty standard prescribed in the national specification. The test and analysis results indicate that the micro-ADCP provides high-precision flow measurement; it is easy to use and is more adaptable for irrigation flow measurement than the river ADCP. It can be used as a standard instrument to replace traditional meters for calibration or verification of other irrigation flow measurement devices.