River flow full-scale measurement uncertainty calculation method based on unified reference correction

Abstract

The invention provides a river flow full-scale measurement uncertainty calculation method based on unified reference correction. The method comprises the steps of drawing up a full-scale water level flow relation curve, drawing up an upper envelope line of the full-scale water level flow relation curve and drawing up a lower envelope line of the full-scale water level flow relation curve, determining a unified reference, correcting and calculating a relative error of actually measured flow and the reference, and calculating a flow standard deviation and total uncertainty. By applying the method, the influence of initial constant errors of measurement instruments or methods for positioning, water depth, flow velocity and the like on relative error calculation differences of high, medium and low water flows can be avoided; conditions can be created for unifying allowable error standards of high, medium and low water flow tests; and the problem of small and medium flow test error evaluation in ecological flow, water resource monitoring and the like can be solved.

Description

Technical field [0001] The present invention relates to the field of hydrological measurement applications, in particular, involving unified reference revised river flow full range measurement uncertainty calculation method. Background technique [0002] China's river flow test accuracy is expressed in total uncertainty. Each year is high, medium and low water calculates a total uncertainty for accuracy assessment, and is compared to different water levels to compare whether it is satisfied. The relative error of existing single traffic is pressed Calculate, it assumes that the measured flow error at all levels is the same normal distribution, and accordingly calculates the standard deviation standard and the total random uncertainty. Since the initial error of the initial errors, the initial error of this type is not considered, the initial error is calculated to calculate the relative error of the low water, and the problem of smaller water has a long period of time, and canno...

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Problems solved by technology

Since the influence of the initial errors of measuring instruments such as starting point distance, water depth, and flow velocity is not considered, the problem that such initial errors have a greater impact on the calculation of the relative error of low water and less impact on high water has existed for a long time, and it is impossible to formulate high, medium, and low The allowable error of the unified flow test of water, even the national standards such as "River Flow Test Specifications", has to determine the allowable error of flow at different water level levels according to the water level level and the purpose of the data or the service object

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