Non-contact river surface velocity measurement based regression calculation method for instantaneous flow rate

Abstract

The invention discloses a non-contact river surface velocity measurement based regression calculation method for an instantaneous flow rate. According to the method, river multipoint surface flow velocities Vi and a river level height H are measured simultaneously through a non-contact method, a river section area S is obtained according to the river level height H, S is a function of H, that is, S=(S)H, a river surface average flow velocity is obtained according to river multipoint surface flow velocities Vi as following, and then a formula that M=K*Vs*S is used for calculating a river section instantaneous flow rate, wherein Vs is the river surface average flow velocity, and S is the river section area obtained according to the river level height. By the aid of the method, the instantaneous flow rate of a river can be calculated through surface flow velocities, river levels and section data provided by a non-contact velocity measurement technology, the proximity of the data obtained through non-contact measurements to data obtained through manual measurements is high, the error is small, and non-contact measurements can completely substitute for manual measurements.

Description

technical field [0001] The invention belongs to the technical field of remote measurement of river flow, in particular to an instantaneous flow regression calculation method based on non-contact river surface velocity measurement. Background technique [0002] River flow measurement refers to the periodic dynamic measurement of the real-time flow of rivers. River flow measurement is of great significance for mastering water regime and water resources, water and soil conservation and environmental protection, rational allocation of water resources, flood control and disaster reduction, and even putting forward corresponding design requirements for infrastructure across or near rivers. [0003] River flow measurement has traditionally employed contact measurement techniques. Flow measurement technologies including mechanical flow meters and acoustic Doppler current profilers (ADCP) are all contact flow measurement technologies. Under the technical conditions of contact flo...

AI Technical Summary

Problems solved by technology

However, non-contact measurement can only directly measure the flow velocity at multiple points on the river surface, and cannot measure the flow velocity at multiple points on the river section like mechanical current meters and acoustic Doppler current profilers (ADCP), so that it cannot directly measure the instantaneous flow of rivers

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