Evaluation of ADCP Streamflow Measurements in Open Channel

Yuan Liu, Heming Hu, XueLing Qiu, Deyue Zou

Abstract

The purpose of this paper is to explore the potential of calibration of ADCP discharge measurement in open channel, which conclusion can improve the traceability of ADCP. In this paper, the current velocity and discharge synthesis and other important issues are taken into consideration, and establishes a set of rectangular open channel standard discharge facility, and conducts experimental research on the flow measurement by using Workhorse. The moving boat ADCP measurement uncertainty source is analyzed, and the error situation introduced by the approximate solution is analyzed. By estimating the back scattering intensity, a new type of acoustic reflector is designed, so that the signal quality of ADCP can be kept in the best state in the process of towing calibration, so as to ensure the reliability of the WT measurement results. An experimental device for WT, BT, depth measurement is established to evaluate the basic performance of the instrument. At last an ultrasonic transit time flow-meter(UFM) is taken as reference in field situation, to calibrate the discharge directly, the results are close to laboratory calibration.

Keywords

ADCP Streamflow; Open Channel; Uncertainty; Calibration

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IMEKO-TC9-2019-072.pdf

DOI

10.21014/tc9-2022.072

IMEKO TC

TC9 - Flow Measurement

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