Urban rainstorm waterlogging ponding depth extraction method

A technology of water accumulation depth and urban rainstorm, which is applied in instruments, data processing applications, forecasting, etc., can solve the problems of cumbersome calculation process, difficult rainstorm waterlogging and rapid prediction, difficult operation and operation, etc., and achieves the effect of improving simulation accuracy.

Active Publication Date: 2019-04-19
HANGZHOU NORMAL UNIVERSITY
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Problems solved by technology

[0005] The present invention mainly solves the problems of difficult operation, cumbersome calculation process, high data requirements, difficulty in realizing simple and rapid prediction of rainstorm waterlogging and waterlogging and low accuracy of simulation results in the existing urban water accumulation prediction method, and provides a A simple operation, convenient calculation, and fast simulation speed method for extracting the depth of urban rainstorm waterlogging

Method used

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  • Urban rainstorm waterlogging ponding depth extraction method
  • Urban rainstorm waterlogging ponding depth extraction method
  • Urban rainstorm waterlogging ponding depth extraction method

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Embodiment 1

[0079] In this embodiment, a method for extracting the depth of urban rainstorm and waterlogging, such as figure 1 shown, including the following steps:

[0080] S1: Establish urban terrain model;

[0081] S2: Obtain the urban depression water contribution area;

[0082] S3: Establish urban rainfall model and urban drainage model;

[0083] S4: Obtain the total surface runoff;

[0084] S5: Establish the urban surface water model and obtain the water depth.

[0085] Such as figure 2 As shown, the urban terrain model is established in the step S1, including the following steps:

[0086] S01: Use existing large-scale topographic maps to scan and vectorize, or use total stations, range finders and electronic tablets to directly measure three-dimensional coordinates to obtain digital elevation topographic data of cities, obtain high-resolution remote sensing images through satellites, and map to obtain city administrative boundary data;

[0087] S02: Use the administrative b...

Embodiment 2

[0137] Compared with Embodiment 1, this embodiment has different methods for setting up urban rainfall models in this embodiment, such as Figure 5 shown, including the following steps:

[0138] S31: Using spatial interpolation method to simulate the spatial distribution of rainfall;

[0139] S32: Calculate the total rainfall in each depression contribution area using spatial statistical methods.

[0140] The method of establishing the urban rainfall model in this embodiment is applicable to the situation where there are few statistical data of rainfall stations and the formula of the rainstorm intensity cannot be obtained.

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Abstract

The invention relates to an urban rainstorm waterlogging ponding depth extraction method. The method comprises the steps of establishing an urban terrain model, obtaining an urban depression ponding contribution area, establishing an urban rainfall model and an urban drainage model, obtaining the total surface runoff, establishing an urban surface ponding model and obtaining the ponding depth. Themethod has the advantages that the original digital elevation model is corrected, so that the real urban terrain can be reflected; A depression contribution area is used as a basic hydrological unit,so that the diffusion process of water flow on the surface of a complex city can be reflected more truly, and the simulation precision is improved; The evaporation and permeation of rainfall and thedrainage process of a sewer system are simplified, so that the model is easy to operate and quick in calculation to obtain accumulated water information.

Description

technical field [0001] The invention relates to the technical field of flood control and waterlogging prevention, in particular to a method for extracting the depth of urban rainstorm waterlogged water. Background technique [0002] With global climate change and rapid urbanization, the frequency and intensity of natural disasters are also increasing due to the interaction between natural and human factors. The problems caused by urban expansion have become increasingly prominent, especially the urban waterlogging and waterlogging caused by heavy rainfall in the flood season have become urgent problems for most cities. Urban flooding is one of the most serious disasters, which can cause huge human and socioeconomic losses. For example, the torrential rain disaster in Beijing from July 21 to 22, 2012 caused at least 79 deaths and affected more than 1.9 million people. Therefore, urban flooding and flooding problems have attracted increasing attention in recent years. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/26
CPCG06Q10/04G06Q50/26
Inventor 胡潭高李瑶张路沈黎达陈燕管昱
Owner HANGZHOU NORMAL UNIVERSITY
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