Flood efficient early warning method based on hydrological-hydrodynamic integrated model and application of flood efficient early warning method

An integrated model and hydrodynamic technology, applied in data processing applications, forecasting, instruments, etc., can solve the problems of high computational difficulty and low computational efficiency, and achieve the effect of reducing computational difficulty and improving computational efficiency.

Pending Publication Date: 2022-07-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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  • Application Information

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Problems solved by technology

Including: obtaining the input data of the watershed to be predicted; inputting the input data into the water environment prediction model; Water body to the dynamic simulation of ecology; In addition, although the existing technologies such as public number: CN112528563A, CN112949167A, CN113723024A, CN113792437A, CN113902211A have all realized the early warn...

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  • Flood efficient early warning method based on hydrological-hydrodynamic integrated model and application of flood efficient early warning method
  • Flood efficient early warning method based on hydrological-hydrodynamic integrated model and application of flood efficient early warning method
  • Flood efficient early warning method based on hydrological-hydrodynamic integrated model and application of flood efficient early warning method

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Embodiment

[0042] Take a conceptual ramp model ( Figure 4 ) as an example, including the length, width, low side height, high side height, and slope S (for example: length 100m, width 10m, low side height 20m, high side height 40m, slope S is 0.1) impermeable Rainfall R is applied on the slope, and all of the rainfall becomes runoff on the slope surface and all flows out on the short side of the slope:

[0043] 1) Collect topographic data and land use data in a certain area, including digital elevation information (DEM) and underlying surface roughness coefficient;

[0044] refer to Figure 4 , Figure 4 It is a diagram of a specific embodiment of the present invention. according to Figure 4 Determine terrain information (slope is 0.1) and underlying surface roughness coefficient (take 0.3)

[0045] 2) Further, input the hourly rainfall intensity R;

[0046] The rainfall intensity was obtained from the meteorological observation station, and the rainfall lasted for 4 days.

[00...

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Abstract

The invention discloses an efficient flood early warning method based on a hydrological-hydrodynamic integrated model and application thereof. The method comprises the following steps: collecting topographic data and land utilization data of a certain area; inputting hourly rainfall intensity R; establishing a balance relationship among the total input rate, the total water storage increase rate and the total output rate in the water collection area by using the law of conservation of mass through a hydrological physical model; according to a 2Dkinematics-wave hydrodynamic model, establishing a hydraulic relation between the outflow velocity of the section and the average water depth of the section; establishing a two-layer simultaneous relationship of the two models according to the fact that the outflow velocity of the cross section calculated by the hydrological physical model and the hydrodynamic model should be equal to the total water storage capacity in the water collection area all the time; constructing a flood efficient early warning equation based on a hydrological-hydrodynamic integrated model; according to historical observation data, continuously calibrating calculation parameters in the efficient flood early warning method based on the hydrological-hydrodynamic integrated model; and outputting calculation results of the water depth and the flow velocity of the flood.

Description

technical field [0001] The invention relates to an early warning method and application thereof, in particular to a flood efficient early warning method based on a hydrology-hydrodynamic integration model and its application. Background technique [0002] Flood disasters have caused great harm to national property and people's lives. Distributed flood depth and flow velocity are two crucial hydraulic parameters in flood evolution scenario simulations in watersheds. At present, the water depth and flow velocity of distributed floods are mainly calculated using a simple hydrodynamic model or a hydrology-hydrodynamic coupled model. However, the current simple hydrodynamic model can not fully meet the needs of flood simulation and forecasting in the basin , 2021, 52(10): 1137-1150.); on the other hand, although the hydrology-hydrodynamic coupling model replaces / simplifies part of the hydrodynamic calculation through hydrological calculation, it improves the calculation efficie...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/26G06F17/18
CPCG06Q10/04G06Q50/26G06F17/18
Inventor 朱玉龙张亚芬杨家强王远坤
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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