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Method and system for correcting model parameters of alluvial river water-sediment models in real time

A model parameter, real-time correction technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of model parameter error growth, influence model accurate prediction, water and sediment model uncertainty, etc., to achieve alluvial rivers. Accurate effect of water and sand model

Active Publication Date: 2018-09-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Application Information

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Problems solved by technology

However, for the water-sediment model of alluvial river processes, even with accurate initial data and input data, the inaccurate expression of model parameters will lead to error growth, affecting the ability of the model to accurately predict the real state of water-sediment movement, becoming a water-sediment model. Key Factors of Model Uncertainty

Method used

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  • Method and system for correcting model parameters of alluvial river water-sediment models in real time
  • Method and system for correcting model parameters of alluvial river water-sediment models in real time
  • Method and system for correcting model parameters of alluvial river water-sediment models in real time

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Embodiment 1

[0041] figure 1 It is a flow chart of the steps of a method for real-time correction of model parameters of an alluvial river water-sediment model provided by an embodiment of the present invention.

[0042] refer to figure 1As shown, the real-time correction method of model parameters provided in this embodiment is used to correct the model parameters of the alluvial river water-sediment model, so as to make the model more accurate and obtain more accurate prediction results. The correction method specifically includes Follow the steps below:

[0043] S1. Using pre-obtained water body boundaries to generate a channel plane orthogonal body-fitted grid, and using pre-collected river channel elevation points to interpolate and generate node elevation values ​​of the river channel plane orthogonal body-fitted grid.

[0044] Select remote sensing image data with high spatial resolution, such as GF1, Landsat and other data, after radiometric correction, atmospheric correction, an...

Embodiment 2

[0110] Figure 4 A structural block diagram of a model parameter real-time correction system for an alluvial river water-sediment model provided by an embodiment of the present invention.

[0111] refer to Figure 4 As shown, the real-time correction method of model parameters provided in this embodiment is used to correct the model parameters of the alluvial river water and sediment model, so as to make the model more accurate and obtain more accurate prediction results. The correction system specifically includes The first calculation module 10 , the data acquisition module 20 , the second calculation module 30 , the function selection module 40 , the data processing module 50 , the third calculation module 60 and the parameter optimization module 70 .

[0112] The first calculation module is used to extract the water body boundary of the river channel from the remote sensing images obtained in advance, generate the river channel plane orthogonal body-fitted grid, and use t...

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Abstract

Embodiments of the invention provide a method and system for correcting model parameters of alluvial river water-sediment models in real time. The method comprises the following steps of: extracting awater boundary of a river way by utilizing a pre-obtained remote sensing image and generating a node elevation value of an orthogonal body fitted mesh on the plane of the river way; obtaining boundary data of the river way and generating initial field data of an alluvial river water-sediment model; discretely solving the alluvial river water-sediment model under a body fitted coordinate system according to the node elevation value and the initial field data; setting a model parameter range of the alluvial river water-sediment model and generating a plurality of parameter sample groups; operating the alluvial river water-sediment model and respectively calculating target function response values corresponding to the parameter sample groups; and carrying out approximate simulation on an input-output relationship of the alluvial river water-sediment model so as to generate a response surface model and optimizing the model parameters of the alluvial river water-sediment model. Through optimizing the model parameters, prediction results obtained by users according to the model can fit the real water-sediment movement state.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method and system for real-time correction of model parameters of an alluvial river water-sediment model. Background technique [0002] For the current large rivers, due to natural variability and human activities such as global climate change, changes in the underlying surface of the basin, and dam construction, the natural water and sediment situation and the boundary conditions of water and sediment transport have been changed, which may cause The occurrence of extreme events such as dam breaks will lead to active water-sediment movement and rapid riverbed deformation, which brings difficulties and challenges to scientific understanding of the mechanism of water-sediment interaction in alluvial river processes and simulation prediction of water-sediment movement changes. [0003] As an important tool for predicting changes in water and sediment movement...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/06
Inventor 冶运涛梁犁丽曹引蒋云钟尚毅梓张双虎杜龙江龚家国王浩杜军凯
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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