Study on Risk Assessment and Early Warning of Flood-Affected Areas when a Dam Break Occurs in a Mountain River

Fan, Qiang; Tian, Zhilong; Wang, Wei

doi:10.3390/w10101369

Cited by 18 publications

(14 citation statements)

References 44 publications

(44 reference statements)

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“…According to the FCEM, it is important to transform the interval value of a single evaluation indel into a certain value by using a membership function. The author constructed a membership function table for THSE assessment in JianYang County based on the characteristics of THSE and the research results of some other experts and scholars [59,60], as shown in Table 9.…”

Section: Evaluation Matrix Of Evaluation Indexesmentioning

confidence: 99%

The Application of the Fuzzy Analytic Hierarchy Process in the Assessment and Improvement of the Human Settlement Environment

Zhang

Fan

2020

Sustainability

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With the development of urbanization in developing countries, some large cities have experienced rapid population growth and industrial expansion in a short period of time. In order to reasonably expand the scale of the city and guide the orderly outward movement of population and industries, it is urgent to improve the human settlement environment (THSE) in the surrounding areas of large cities. In the case of limited financial funds, different areas around the city need to be improved one by one according to the order of improvement grades. Since THSE is a comprehensive system involving multiple levels and indexes, it is difficult to assess it in a simple way. The previous assessment of THSE mainly focused on qualitative and semi-quantitative aspects, with poor accuracy. In this paper, the author takes JianYang County under the jurisdiction of Chengdu City in Southwest China as an example and uses the Fuzzy Analytic Hierarchy Process (FAHP) to quantitatively calculate the improvement grade of THSE in 55 townships of JianYang County. The author carried out an investigation for more than one year. According to the actual situation of JianYang County, five primary indexes and 22 secondary indexes were selected to establish a comprehensive evaluation index system. This index system contains 1210 statistical data points, and more than 30,000 data points were calculated and derived in this article. Finally, the author calculated the improvement grade of 55 townships by FAHP quantitatively and carried out a horizontal comparison of townships within the same grade to further determine the order of improvement of THSE.

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Section: Evaluation Matrix Of Evaluation Indexesmentioning

confidence: 99%

The Application of the Fuzzy Analytic Hierarchy Process in the Assessment and Improvement of the Human Settlement Environment

Zhang

Fan

2020

Sustainability

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“…Furthermore, there is no widely accepted definition of the social impact of dam breaks. Therefore, the social impact of other industries or natural disasters and the existing research results of scholars can provide a reference for the establishment of a social impact assessment index system for dam breaks in this paper [57][58][59].…”

Section: Evaluation Index Systemmentioning

confidence: 99%

Evaluation of Dam Break Social Impact Assessments Based on an Improved Variable Fuzzy Set Model

He¹,

Jaturapitakkul²,

Qin³

et al. 2020

Water

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In recent years attention has shifted from “dam safety” to “dam risk” due to the high loss characteristics of dam breaks. Despite this, there has been little research on social impact assessments. Variable fuzzy sets (VFSs) are a theoretical system for dealing with uncertainty that are used in many industries. However, the relative membership degree (RMD) calculations required for VFSs are complicated and data can be overlooked. Furthermore, the RMD is highly subjective when dealing with qualitative problems, which can seriously affect the accuracy of the results. This study introduces grey system theory (GST) which analyzes the RMD characteristics to improve traditional VFSs. A new method for calculating the social impact of a dam break is proposed based on the correlation between the core parameters of the two theories. The Liujiatai Reservoir is used as a test case and the new and traditional evaluation methods are compared. The results show that the proposed method has advantages when dealing with uncertainty that are consistent with the characteristics of the problems associated with dam break social impact assessments. Moreover, the evaluation results obtained using the proposed method are consistent with, or more accurate than, those obtained using the traditional method.

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“…where ω is the weight of each evaluation index. Traditional set pair analysis defines the ratio of identity degree to opposite degree as set pair potential, as expressed in Equation (9).…”

Section: Determine the Connection Degreesmentioning

confidence: 99%

“…However, due to the storage of water on such a scale, huge potential energy is generated and poses a great threat to the downstream [2]. Dam break produces a large number of destructive floods [3][4][5][6], results in loss of life and economy [7][8][9], and causes enormous negative impact on the environment and ecosystem. In recent years, there have been many serious dam break accidents.…”

Section: Introductionmentioning

confidence: 99%

Improved Set Pair Analysis and Its Application to Environmental Impact Evaluation of Dam Break

et al. 2019

Water

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Despite the rapid development of risk analysis in dam engineering, there is a relative absence of research on the environmental impact of dam break. As a systematic theory, set pair analysis has a good effect in dealing with uncertainties, although the result is relatively rough and easy to distort. A connection degree of five grades and a generalized set of potential are introduced to improve traditional set pair analysis. Combined with the index system, the evaluation model of the environmental impact of dam break is established, which is based on generalized set pair analysis. Taking Sheheji Reservoir dam as an example, a comparison of evaluation results of fuzzy mathematics theory and generalized set pair analysis is made, which verifies the scientificity and practicability of the method proposed in this paper. The results show that the evaluation grade of the environmental impact of dam break at Sheheji Reservoir is serious, and appropriate management measures should be taken to reduce the risk.

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Study on Risk Assessment and Early Warning of Flood-Affected Areas when a Dam Break Occurs in a Mountain River

Cited by 18 publications

References 44 publications

The Application of the Fuzzy Analytic Hierarchy Process in the Assessment and Improvement of the Human Settlement Environment

The Application of the Fuzzy Analytic Hierarchy Process in the Assessment and Improvement of the Human Settlement Environment

Evaluation of Dam Break Social Impact Assessments Based on an Improved Variable Fuzzy Set Model

Improved Set Pair Analysis and Its Application to Environmental Impact Evaluation of Dam Break

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