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Residential building loss calculation method based on disaster damage curve and hydrodynamic model

A calculation method and hydrodynamic technology, applied in calculation, design optimization/simulation, instruments, etc., can solve the problems of inaccuracy and inefficient calculation of flood disaster losses, etc., and achieve the effects of high accuracy of results, saving workload and improving efficiency

Pending Publication Date: 2022-04-12
BEIJING UNIV OF TECH
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Problems solved by technology

[0004] In order to solve the problem of inefficient and inaccurate calculation of urban residential building flood disaster loss, a calculation method for urban residential building flood disaster loss based on disaster loss curve and hydrodynamic model is proposed, which will help improve the calculation efficiency and accuracy of residential building flood disaster loss

Method used

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  • Residential building loss calculation method based on disaster damage curve and hydrodynamic model
  • Residential building loss calculation method based on disaster damage curve and hydrodynamic model
  • Residential building loss calculation method based on disaster damage curve and hydrodynamic model

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Embodiment 1

[0030] Taking the downtown area of ​​Shijiazhuang as an example, the research area covers an area of ​​223.49 square kilometers and covers 907 main pipes. After processing, 455 water outlets, 78,051 pipe sections, and 78,106 pipe network nodes are obtained. The total length of the pipe sections is 1,182.2 kilometers. 77651 water areas. The method based on the disaster damage curve and the hydrodynamic model is used to calculate the flood disaster loss of urban residential buildings, and the water depth-loss value curve of indoor property is constructed respectively, and the water depth-unit area loss curve of wall and floor is as follows figure 1 , 2 , 3 shown. And built a rainwater pipe network model, such as Figure 4 shown. The model was calibrated using the three measured rainfall inundation ranges on June 29, July 9, and August 9 in 2020. The calibration results are as follows Figure 5 shown.

[0031] The building distribution map is extracted from the satellite map...

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Abstract

The invention discloses a residential building loss calculation method based on a disaster damage curve and a hydrodynamic model, and belongs to the technical field of municipal engineering. The method comprises the following steps: firstly, dividing urban resident income levels according to family income and expenditure data, evaluating the types and quantity of family indoor properties of different income levels, and establishing corresponding building disaster and damage curves including an indoor property loss curve and a house structure curve by adopting a synthetic curve method; secondly, constructing a one-dimensional pipe network model, an earth surface confluence model and a two-dimensional earth surface sheetflood model according to data such as an urban drainage pipe network, terrain elevation and river and lake water systems, coupling to obtain an urban waterlogging model, and calibrating and verifying the urban waterlogging model; and finally, on the basis of the urban inland inundation model, calculating the residential building loss under different design rainfall scenes in the research area by adopting a disaster damage curve, thereby obtaining the loss distribution condition of the research area. According to the method, the limitation of a traditional disaster damage curve construction method can be broken through, the method of combining the disaster damage curve and the hydrodynamic model is used for evaluating the loss, and the method is beneficial for improving the loss calculation efficiency and precision.

Description

technical field [0001] The invention belongs to the technical field of municipal engineering, and is a flood disaster loss calculation method that fully considers the actual loss situation, especially a method for refining the types and quantities of indoor properties of different income classes during the construction of disaster damage curves. Background technique [0002] The construction of disaster damage curve is a key step in the evaluation of urban flood disaster loss, and its construction results have a great impact on the accuracy of urban flood disaster loss. In recent years, due to the insufficient capacity of the drainage system, the low-lying terrain of the urban area, and the increase of the impervious area of ​​the urban underlying surface, the drainage system has a heavy burden, and urban floods have occurred frequently. Building loss is an important part of flood disaster assessment. Building loss also includes indoor property loss and house structure loss....

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/18G06F30/28G06Q50/26G06F111/12
CPCY02A10/40
Inventor 王昊李慧初祁周晋军
Owner BEIJING UNIV OF TECH
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