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Method for simulating rainfall flood of concave flyover

A simulation method and overpass technology, applied in 3D modeling, character and pattern recognition, image data processing, etc., can solve problems such as low simulation accuracy and lack of verification data, and achieve the effect of improving simulation accuracy and improving accuracy

Active Publication Date: 2020-07-31
CAPITAL NORMAL UNIVERSITY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of this, the purpose of this application is to provide a method for simulating rainwater on sunken overpasses, so as to solve the problems of low simulation accuracy and lack of verification data in current urban rainstorm simulations

Method used

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  • Method for simulating rainfall flood of concave flyover
  • Method for simulating rainfall flood of concave flyover
  • Method for simulating rainfall flood of concave flyover

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] as attached figure 1 As shown, a method for simulating rainwater on a sunken overpass includes the following steps:

[0062] S1. Collect data, build a database, and perform multi-source data fusion.

[0063] Among them, the collected data includes rainfall data, elevation data, pipe network data, and remote sensing data.

[0064] The rainfall data is Doppler radar rainfall data, high-precision Doppler radar rainfall data is introduced, the spatial distribution of rainfall in the study area is fully considered, and the Doppler radar data set is downscaled to obtain 500m spatial resolution High-resolution rainfall data; make full use of the overlapping observation data of the current weather radar station network to realize the spatial downscaling of radar data, and then use the downscaled radar reflectivity to fit the exponential relationship with precipitation and estimate High spatial resolution precipitation parameters.

[0065] Construct an empirical relationship ...

Embodiment 2

[0107] Based on the above example 1, the Lianhua Bridge in the "721" rainstorm event in Beijing was taken as the research area, and its rain and flood process was simulated.

[0108] By considering the changes in the sub-catchments and the differences in the spatial distribution of rainfall during the storm-flood process, two comparative examples were designed. Comparative example 1 did not consider the changes in the sub-catchments and the spatial distribution of rainfall in the study area. The process is not divided into stages; comparative example 2 is to consider the influence of the difference in the spatial distribution of rainfall in the study area on the simulation results. The rainfall is described by the meter, so as to study the influence of the spatial distribution of rainfall on the simulation results.

[0109] The SWMM model is used to simulate the rain and flood process in the Lianhuaqiao area. SWMM is a dynamic rainfall-runoff simulation calculation model, whic...

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Abstract

The invention relates to a method for simulating rainfall flood of concave flyover, and the method comprises the following steps: S1, collecting data, building a database, and carrying out multi-source data fusion; S2, carrying out rainfall flood simulation on the dynamic change of the sub catchment area by utilizing a rainfall flood model, and carrying out staged simulation on the rainfall floodprocess of the concave bridge area; S3, verifying the simulation result of the step S2 by using an under-bridge digital elevation model. According to the invention, the problems of low simulation precision and lack of verification data in the existing urban rainfall flood simulation are solved; according to the method, the SWMM is adopted to construct the model for rainfall flood simulation, the change of the sub-catchment area in the rainfall flood process is considered, the spatial distribution difference of rainfall is also considered, the simulation precision is greatly improved, and meanwhile, the digital elevation model is adopted to perform back calculation verification on the simulation result, so the rainfall flood simulation precision can be further verified.

Description

technical field [0001] The invention relates to the field of rain and flood simulation, in particular to a simulation method for rain and flood of a sunken overpass. Background technique [0002] In recent years, the pace of my country's social and economic construction has become faster and faster, and some problems have followed. Unreasonable urban construction planning has led to problems such as increased impermeable areas and reduced water storage depressions, which have changed the natural drainage pattern. The development of urbanization has made the "urban rain island" effect obvious. Extreme rainfall occurs frequently, and a large amount of rainfall runoff accumulates in a short time, leading to urban waterlogging, posing a huge threat to the safety of urban residents' property and life, and also bringing huge economic losses to the country. [0003] With the rapid development of cities, the imbalance between traffic travel demand and traffic supply has become more...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06T17/05G06K9/62G01D21/02
CPCG06T17/05G01D21/02G06F18/25Y02A90/10Y02A10/40
Inventor 高博宫辉力李庆端陈蓓蓓朱琳张佳鑫王静
Owner CAPITAL NORMAL UNIVERSITY
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