Open channel flow measurement method, system and device and storage medium

Abstract

The invention provides an open channel flow measurement method, system and device and a storage medium, and the method comprises the steps: building a CFD model of a to-be-detected open channel section during normal water supply, and carrying out the fitting of the CFD model to obtain a flow velocity field of the open channel section; extracting flow velocity data on a plurality of measuring vertical lines in the open channel section flow velocity field based on the flow velocity field; according to the flow velocity data on the plurality of vertical lines, obtaining flow velocity distribution on the plurality of vertical lines and a transverse flow velocity distribution rule of the plurality of vertical lines, and further obtaining a flow velocity distribution rule of the open channel section; and actually measuring the flow velocity value of a reference point of the open channel section and calculating the total flow of the open channel section in combination with the flow velocity distribution rule; fitting an open channel section flow velocity field by establishing a CFD model, fitting a section flow velocity distribution rule curve through the flow velocity field, and achieving accumulated calculation of open channel section flow through flow velocity values of fewer actual measurement points. The actual measurement workload can be remarkably reduced, the flow measurement and calculation result is stable and reliable, and the engineering precision requirement is met.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a flow measurement method, system, equipment and storage medium of an open channel. Background technique [0002] With the increasing shortage of water resources, it is of great significance to quickly and accurately measure the water flow of open channels in irrigation areas. At present, most of the measurement methods for open channel water flow in water conservancy projects use traditional methods, such as: flow velocity-area method, water level- Traditional methods such as the flow relationship method and the weir-flume method, but using the traditional water flow measurement method, many need to measure the flow velocity at multiple points during the measurement, which is cumbersome to operate and has a large workload, and if the acoustic Doppler velocity profiler (ADCP) , the equipment is expensive, which is not conducive to popularization; or based on...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a flow measurement method for open channels, which aims to solve the technical problems of the current measurement of open channel water flow, the actual measurement workload is large, and the accuracy of the measurement results is not enough to meet the engineering accuracy

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