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A natural river course cross section stage-discharge relation determining method

A technology of river section and determination method, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as double values, and achieve the effect of avoiding double value problems

Active Publication Date: 2016-10-12
XIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for determining the relationship between water level and flow in natural river sections, and solve the "double value" phenomenon that occurs when directly using the Manning formula method to find the relationship between water level and flow in natural river sections

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  • A natural river course cross section stage-discharge relation determining method
  • A natural river course cross section stage-discharge relation determining method
  • A natural river course cross section stage-discharge relation determining method

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the present invention is not limited to these embodiments.

[0025] The invention provides a method for determining the relationship between water level and flow of a natural river section, which is specifically implemented according to the following steps.

[0026] Step 1: Analysis and correction of the measurement data of the natural channel section.

[0027] Obtain the measured section data (or topographic map extraction data) at the target section A (x i ,z i ), where i=1,...,N, x i Represents the distance from the i-th point to the starting point of the cross-section x 1 distance, z i Represents the elevation value of the point. In order to facilitate subsequent calculation of the relationship between water level and flow, the cross section x 1 and x N Divide them into M small units equally, that is, divide them into M s...

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Abstract

The invention provides a natural river course cross section stage-discharge relation determining method. The method comprises the steps of firstly, obtaining actually-measured cross section data (xi, zi) of a target cross section, forming M subsections between the cross section x1 and xN equally (xni, xni+1), and obtaining the elevation value corresponding to a node of each subsection; secondly, determining the Manning roughness coefficients n of the different cross sections; thirdly, forming Nz layers equally between the lowest elevation and the highest elevation of the cross sections, calculating the discharge value Qij of each subsection of each elevation equal division layer, and calculating the sum of the discharge values Qij of all the subsections to obtain the total cross section discharge value Qj corresponding to the layer; obtaining a stage-discharge relation according to the total cross section flow value Qj of each layer and the stage corresponding to the layer. The method is based on subsection calculation of stage-discharge relations, performs segmentation calculation of corresponding discharges on the river course cross sections according to the roughness and thus obtains the stage-discharge relation corresponding to a whole cross section; the method can avoid the double value problem in conventional stage-discharge relation determination.

Description

technical field [0001] The invention belongs to the technical field of water conservancy engineering, and in particular relates to a method for determining the water level and flow relationship of a natural river section. Background technique [0002] The determination of the water level and flow relationship of the control section in the natural river is the main basis for estimating the flood control capacity of the river and formulating relevant disaster prevention and control measures. It is widely used in the investigation and evaluation of mountain torrent disasters. [0003] Using Manning's formula to determine the water level and flow relationship of the section is a common simple and effective method. However, this method usually generalizes the resistance of the river channel into a single comprehensive resistance coefficient, also known as the Manning coefficient, which is directly solved to obtain the water level and flow relationship of the channel section. The...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 荆海晓王雯魏炳乾李国栋
Owner XIAN UNIV OF TECH
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