System and method for roughness calibration in river water surface line calculation
A surface line and roughness technology, applied in computing, data processing applications, instruments, etc., can solve the problems of low calculation efficiency, poor repeatability, and high error rate, and achieve high solution efficiency, high calibration efficiency, and repeatability. high effect
Active Publication Date: 2019-10-01
POWERCHINA CHENGDU ENG
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Problems solved by technology
[0013] The technical problem to be solved by the present invention is: to propose a system and method for determining the roughness in the calculation of the river water surface line, to solve the problem of low calculation efficiency, poor precision, high error rate and poor repeatability caused by human operation and judgment methods in the traditional technology The problem
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[0044] Such as figure 1 As shown, the system for determining the roughness in the calculation of the river water surface line in this embodiment includes: an input module, a storage module, a water surface line calculation module, a roughness adjustment module, a cycle execution module and an output module. The functional modules are introduced as follows:
[0045] The input module is used for the user to input the relevant information of the entire calculated river section, including: the initial value of the roughness of each section, the calculated boundary conditions under calibration conditions, the calibration data of the entire calculated river section, and the maximum acceptable error of calibration Δ and roughness approximation step size dn;
[0046] The storage module is used to store the relevant information of the entire calculated river section in the form of files;
[0047] The water surface line calculation module is used to solve the calculation of the river ...
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The invention relates to the field of water conservancy and hydropower engineering, discloses a system and a method for roughness calibration in river water surface line calculation, and solves the problems of low calculation efficiency, poor precision, high error rate and poor repeatability caused by manual operation and judgment modes in the prior art. The method comprises: inputting related information of a calculation river reach through an input module, solving and calculating the river water surface line through a water surface line calculation module by means of the DeSaint-Venant equation, and obtaining the difference dz between the calculated water level and the calibrated water level; comparing the dz and the maximum error [delta] acceptable by calibration through the roughness adjusting module, judging whether calibration succeeds or not, and if not, correspondingly adjusting the roughness and then outputting to the water surface line calculating module to continue to be solved; and if the calibration succeeds, storing the calibrated roughness, judging whether all sections are calibrated or not through a cyclic execution module, if all sections are calibrated, outputtingthe calibrated roughness through an output module, and if not, continuing section-by-section solution calculation until all section calibration is completed.
Description
technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a system and method for determining roughness in the calculation of river water surface lines. Background technique [0002] The calculation of river water surface curve is a very important and basic work in the survey, design and operation management of water conservancy and hydropower projects. Efficiency and precision mean a lot. [0003] In order to meet the design requirements, the one-dimensional constant Saint-Venant equations are generally used to solve the river water surface line section by section. The equations are composed of the flow continuity equation and the flow motion equation. [0004] Q=BhU (1) [0005] [0006] In the formula: Q is the flow; B is the river width; h is the average water depth; U is the average flow velocity; A is the cross-water area; z is the water level; [0007] Solving Saint-Venant's equations is to solve ...
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Login to View More IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 蒋陶
Owner POWERCHINA CHENGDU ENG