A method and system for predicting water and sediment in strong alluvial rivers based on data assimilation

A technology of data assimilation and prediction method, applied in prediction, data processing application, special data processing application, etc., can solve problems such as low precision, inability to achieve real-time management of water resources, and inability to assist decision-making.

Active Publication Date: 2021-07-20
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods ignore the dynamic characteristics and conservation laws of river flow evolution, which lead to large errors and low accuracy when using models to predict real-time water level, flow, and water quality. Therefore, such systems are only suitable for instantaneous prediction. Unable to assist decision-making and fail to achieve the purpose of real-time management of water resources

Method used

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  • A method and system for predicting water and sediment in strong alluvial rivers based on data assimilation
  • A method and system for predicting water and sediment in strong alluvial rivers based on data assimilation
  • A method and system for predicting water and sediment in strong alluvial rivers based on data assimilation

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Embodiment 1

[0044] figure 1 It is a flow chart of the steps of a method for predicting water and sediment of a strong alluvial river based on data assimilation provided by an embodiment of the present invention.

[0045] refer to figure 1As shown, the water and sediment prediction method provided in this embodiment is used to predict the water and sediment conditions of strong alluvial rivers based on the method of data assimilation. The specific water and sediment prediction method includes the following steps:

[0046] S101: Generate irregular triangular terrain grid units by using the terrain elevation scatter data obtained through sampling.

[0047] The terrain grid will include the corresponding triangle unit, which can be used as the discrete control body of the strong alluvial river water-sediment model. The specific generation steps are as follows: first, use the sampled terrain elevation scatter data to generate irregular triangular terrain grid units; then, for irregular trian...

Embodiment 2

[0143] image 3 A structural block diagram of a water and sediment prediction system for a strong alluvial river based on data assimilation provided by an embodiment of the present invention.

[0144] refer to image 3 As shown, the water and sediment prediction system provided in this embodiment is used to predict the water and sediment conditions of strong alluvial rivers based on the method of data assimilation. The water and sediment prediction system includes a grid unit generation module 10, an information acquisition module 20, and a model calculation module 30 , information collection module 40 and prediction output module 50 .

[0145] The grid unit generation module is used to generate irregular triangular terrain grid units by using the sampled terrain elevation scatter data.

[0146] The terrain grid will include corresponding triangular units, and the triangular units can be used as discrete control volumes of the strong alluvial river water-sediment model. Thi...

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Abstract

The embodiment of the present invention provides a method and system for predicting water and sediment of strong alluvial rivers based on data assimilation, specifically using the terrain elevation scattered point data obtained by sampling to generate irregular triangular terrain grid units; obtaining the entrance and exit of strong alluvial rivers Boundary water-sediment information and initial field information; take the triangular unit of the terrain grid as the control body, discretize the two-dimensional water-sediment model of the strong alluvial river, select the solution method for calculation, and obtain the calculated value of the control body; real-time collection of strong For the river channel water and sediment state information of alluvial rivers, a real-time prediction model based on data assimilation is established according to the water and sediment state information, and the assimilated state variables and parameter variables are obtained; finally, the two-dimensional water and sediment data assimilation model is used to predict the water and sediment of strong alluvial rivers. Through the above processing, the real-time state of water and sediment in strong alluvial rivers can be effectively predicted, which can support water and sediment regulation, and provide a basis for flood control and disaster reduction, water environment protection and water resource management.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a method and system for predicting water and sediment of strong alluvial rivers based on data assimilation. Background technique [0002] As the global climate changes, the underlying surface of the watershed will change accordingly, and with the construction of dams and other human activities, the natural water and sediment situation and the boundary conditions of water and sediment transport will be changed, which may lead to collapse. The occurrence of extreme events such as dams will further lead to active water-sediment movement and rapid riverbed deformation, which will bring difficulties to the scientific understanding of the mechanism of water-sediment interaction in the alluvial river process and bring more difficulties to predict changes in water-sediment movement. big challenge. [0003] The parameters of the water-sediment model are affected by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06Q10/04
CPCG06Q10/04G06F30/23Y02A10/40
Inventor 冶运涛曹引尚毅梓梁犁丽蒋云钟龚家国仇亚琴杜龙江王浩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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