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Projection pursuit-based method for evaluating flooding risk of drainage pipe network

A drainage network, projection tracking technology, applied in special data processing applications, instruments, climate change adaptation, etc.

Inactive Publication Date: 2010-03-17
BEIJING UNIV OF TECH
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  • Description
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Problems solved by technology

In the process of transforming qualitative analysis into quantitative analysis, many existing comprehensive evaluation methods such as analytic hierarchy process, fuzzy comprehensive evaluation method, gray relational analysis method and cluster analysis method are often disturbed by human empowerment, and there are subjective dependence

Method used

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  • Projection pursuit-based method for evaluating flooding risk of drainage pipe network
  • Projection pursuit-based method for evaluating flooding risk of drainage pipe network
  • Projection pursuit-based method for evaluating flooding risk of drainage pipe network

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Embodiment Construction

[0040] Combine below Figure 1 ~ Figure 3 A specific embodiment of the present invention will be described in detail with an example.

[0041] Taking the risk assessment of drainage pipe network system in a certain area as an example, the assessment process is explained in detail. The area covers an area of ​​about 822 hectares. There are important stadium parks located in this area. The design return period of the drainage system of the stadium in the north-central part of the area is relatively high. The return period in the park is 5 years, and the surrounding municipal system is 1 year. .

[0042] Firstly, the data of the drainage pipe network in this area are collected, and the drainage pipe network model is used to model the drainage system in this area. The Chicago design rainstorm with a return period of 5 years, 10 years, 30 years, 50 years, and 100 years was used as the input of the model for simulation calculations to obtain the hydraulic status of the drainage ne...

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Abstract

The invention discloses a projection pursuit-based method for evaluating flooding risk of a drainage pipe network, which relates to the technical field of system comprehensive evaluation. The method integrates multi-aspect flooding risk effect factors from a drainage pipe network model, a geographic information system and a database system and uses a projection pursuit evaluation method for evaluating the flooding risk of the drainage pipe network. In the method, linear projection is conducted on each evaluation indicator sample; an optimal projection direction vector is searched in accordancewith a certain principle and the optimal projection direction vector reflects the important level of each evaluation indicator, namely objective weight, and based on the objective weight, a comprehensive evaluation number is established for conducting evaluation grading on the flooding risk of the drainage pipe network, thus providing technical support for emergency rescue in flood season. The method avoids one-sidedness of human analysis in evaluation process, has more scientific evaluation result, and can vividly and directly represent disaster risk degree and distribution due to an obtained flooding disaster risk map, thus providing excellent decision platform for rescue dispose.

Description

technical field [0001] The invention relates to a system comprehensive evaluation technology, in particular to a method for evaluating the flood risk of a drainage pipe network based on projection tracing. Background technique [0002] Drainage system is an important urban infrastructure, which is responsible for the timely removal of surface rainwater runoff and the important function of preventing flood disasters. However, global climate change and increasing urbanization have resulted in frequent flooding in urban areas with drainage systems. Flood disasters in urban drainage systems are different from flood disasters in rivers. They have the characteristics of short outbreak time and serious economic losses. management problems). In recent years, large and medium-sized cities in China have suffered floods caused by torrential rains, causing serious social and economic losses. The urban flood control management with the river water conservancy model as the main tool ca...

Claims

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Application Information

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IPC IPC(8): G06Q10/00G06Q50/00G06F17/50
CPCY02A10/40
Inventor 周玉文王磊张晓昕刁克功王新庆王峰张红旗李文涛邢丽云李骥
Owner BEIJING UNIV OF TECH
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