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River flow prediction method based on relationship between river middle surface velocity and river width

A technology for intermediate surface and flow prediction, applied in complex mathematical operations, instruments, electrical digital data processing, etc.

Pending Publication Date: 2020-12-04
JIANGSU MARINE RESOURCES DEV RES INST LIAN YUNGANG +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] In order to solve the existing problems of measuring river flow by using the traditional manual operation velocity area method, the present invention proposes a river flow prediction method based on the relationship between the middle surface velocity of the river and the width of the river. The method of the present invention greatly saves time and manpower. , Material

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  • River flow prediction method based on relationship between river middle surface velocity and river width
  • River flow prediction method based on relationship between river middle surface velocity and river width
  • River flow prediction method based on relationship between river middle surface velocity and river width

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Experimental program
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Embodiment

[0055] Embodiment: (1) utilize the function ( Figure 4 shown), select the function expression with the best correlation.

[0056]

[0057] (2) Substitute the average depth and average velocity into The selected data is the data of flow 2000 to 3000.

[0058]

[0059] (3) Substitute the river width, average velocity, and average depth into Q=B*v*h

[0060] figure 2 As shown in , according to the above-mentioned embodiment, 6 sets of station data are given, specifically stations 31, 32, 33, 34, 35, and 36, and the surface midpoint velocity and average velocity (average flow velocity) are respectively given , calculation speed, average depth, calculation depth, river width, ADCP flow, calculation flow and relative error, through figure 2 According to the data analysis and comparison in , it can be seen that the error obtained by the prediction method of the present invention is relatively small, which can meet the demand for river flow prediction.

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Abstract

The invention discloses a river flow prediction method based on the relationship between the middle surface speed and the river width of a river, and the method comprises the steps: firstly fitting the relationship between the middle surface speed and the average speed and the relationship between the average speed and the average depth according to existing hydrological data (the average depth, the average speed and the middle surface speed), and measuring the river width; then, adopting a flow velocity area method to obtain flow. As only the speed and the width of one point need to be measured, compared with a Venturi method, the hydrological parameter precision required by the method is low, and the obtained flow precision is high. Compared with ADCP, the method is simple to operate, saves a large amount of manpower, material resources and financial resources, and is suitable for some emergencies. Compared with a Manning formula for flow measurement, the method does not need to measure roughness and hydraulic gradient.

Description

technical field [0001] The invention belongs to the field of flow forecasting of wide rivers, in particular to a river flow forecasting method based on the relationship between the middle surface velocity of a river and the river width. Background technique [0002] With the increase of industrial and agricultural production and people's domestic water consumption, "the contradiction between supply and demand of water resources is becoming increasingly acute", planning water use and water allocation work is becoming more and more important. The presentation and emphasis on water resource issues "in many occasions, it is hoped to quickly and accurately measure the flow of open channels" is prominently reflected in the calculation of water volume in irrigation districts and water diversion projects, the control of total pollutants, and the scheduling and allocation of water resources. The method that has been used in our country is mainly the flow velocity area method, which r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/28G06F17/18G06F113/08G06F119/14
CPCG06F30/28G06F17/18G06F2113/08G06F2119/14
Inventor 孙佳龙张鹏余永久蒋宇轩周卫国沈智超徐霞蔚郭淑艳
Owner JIANGSU MARINE RESOURCES DEV RES INST LIAN YUNGANG