scholarly journals RISK ASSESSMENT OF NEARSHORE HAZARD AND VULNERABILITY USING THE ENTROPY METHOD

2019 ◽  
Author(s):  
LIEN-KWEI CHIEN ◽  
CHI-WEN HUANG ◽  
WEI-PO HUANG ◽  
CHENG-YU KU
Keyword(s):  
Risk Assessment ◽  
Entropy Method

scholarly journals Testing a Comprehensive Volcanic Risk Assessment of Tenerife by Volcanic Hazard Simulations and Social Vulnerability Analysis

2020 ◽  
Vol 9 (4) ◽  
pp. 273 ◽  
Author(s):  
Weiqiang Liu ◽  
Long Li ◽  
Longqian Chen ◽  
Mingxin Wen ◽  
Jia Wang ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Risk Reduction ◽  
Social Vulnerability ◽  
Volcanic Hazards ◽  
Entropy Method ◽  
Volcanic Risk ◽  
Analytic Hierarchy ◽  
The North ◽  
Volcanic Risk Assessment ◽  
The Impact

Volcanic activity remains highly detrimental to populations, property and activities in the range of its products. In order to reduce the impact of volcanic processes and products, it is critically important to conduct comprehensive volcanic risk assessments on volcanically active areas. This study tests a volcanic risk assessment methodology based on numerical simulations of volcanic hazards and quantitative analysis of social vulnerability in the Spanish island of Tenerife, a well-known tourist destination. We first simulated the most likely volcanic hazards in the two eruptive scenarios using the Volcanic Risk Information System (VORIS) tool and then evaluated the vulnerability using a total of 19 socio-economic indicators within the Vulnerability Scoping Diagram (VSD) framework by combining the analytic hierarchy process (AHP) and the entropy method. Our results show good agreement with previous assessments. In two eruptive scenarios, the north and northwest of the island were more exposed to volcanic hazards, and the east registered the highest vulnerability. Overall, the northern municipalities showed the highest volcanic risk in two scenarios. Our test indicates that disaster risk varies greatly across the island, and that risk reduction strategies should be prioritized on the north areas. While refinements to the model will produce more accurate results, the outputs will still be beneficial to the local authorities when designing policies for volcanic risk reduction policies in Tenerife. This study tests a comprehensive volcanic risk assessment for Tenerife, but it also provides a framework that is applicable to other regions threatened by volcanic hazards.

The Framework for Generating Climate Risk Infographic and Applying to Risk Communication

2020 ◽  
Author(s):  
Chin Chieh Liu ◽  
Ching Pin Tung
Keyword(s):  
Climate Change ◽  
Risk Assessment ◽  
Risk Communication ◽  
Entropy Method ◽  
Climate Risk ◽  
Hazard Exposure ◽  
Adaptation Pathway ◽  
Plan Adaptation ◽  
Strategy Planning ◽  
Composition Factors

<p>      Adaptation is an indispensable part of climate change impact, and risk assessment plays an important role between data arrangement and strategy planning. This study aims at developing a framework from risk assessment to information presentation, then applying to risk communication. This framework refers to Climate Risk Template, defining risk as to the integration of hazard, exposure and sensitivity; simultaneously, Climate Risk Template is an auxiliary tool basing on Climate Change Adaptation Six Steps(CCA6Steps), which is the systematic procedure to analyze risk and plan adaptation pathway. This study emphasized on landslide disaster as the key issue and selected community residents, roads as the protected targets. First of all, collate stimulated results of landslide potential evaluation and literature, cases, questionnaires which were probed into exposure and sensitivity. Next, establish a factors list of climate risk and giving weights to correlation factors by Entropy Method. Finally, use risk matrix to evaluate the risk value and present the results of risk assessment by infographic. For essentially helping on risk communication, this study proposes a framework to make the general public understand the causes of regional disaster risk and assists executive units to implement climate risk assessment and adaptation pathway planning. Eventually, the study will innovate a prototype of using this framework; therefore, users just have to write down the key issue, protected target and choose the composition factors of risk, then they can accomplish climate risk assessment and generate climate risk infographic by themselves.</p><p>Keywords: Climate risk template, Climate risk assessment, Risk communication, infographic</p>

Flash Flood Risk Assessment using PROMETHEE and Entropy Method

2011 ◽  
Vol 11 (3) ◽  
pp. 151-156 ◽  
Author(s):  
Jung-Ho Lee ◽  
Hwan-Don Jun ◽  
Moo-Jong Park ◽  
Jae-Hak Jung
Keyword(s):  
Risk Assessment ◽  
Flood Risk ◽  
Flash Flood ◽  
Entropy Method ◽  
Flood Risk Assessment

scholarly journals Debris Flow Risk Assessment Method Based on Combination Weight of Probability Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Li Li ◽  
Shi Xin Zhang ◽  
Shao Hong Li ◽  
Yue Qiang ◽  
Zhou Zheng ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Debris Flow ◽  
Specific Weight ◽  
Assessment Method ◽  
Entropy Method ◽  
Equal Weight ◽  
Uniform Random Variable ◽  
New Approach

Risk assessment of debris flow is conducted by multicriteria decisions. Based on the shortcomings of the existing methods in determining the weight of assessment factors, this paper proposes a new approach to conduct a risk assessment of debris flow. This new approach regards the weight of factors as a uniform random variable, whose bounds could be determined by the equal weight method, maximal deviation method, and entropy method. The results of this new approach are obtained by Monte Carlo simulation. According to the risk of 72 debris flows collected in Beichuan, Sichuan, China, this new approach proves convergent. It is suggested that the minimum sample amount of Monte Carlo simulation should be 63095. The result also demonstrates that sorted results with different weights of factors vary a lot, so it is not convincing to sort samples with a specific weight.

Application of Extension Theory Based on Optimal Combination Weighting Method in Risk Assessment on Geological Hazards

2012 ◽  
Vol 226-228 ◽  
pp. 2284-2291
Author(s):  
Xia Lin Wang ◽  
Bao Wen Yan
Keyword(s):  
Risk Assessment ◽  
Element Model ◽  
Entropy Method ◽  
Optimal Combination ◽  
Extension Theory ◽  
Geological Hazards ◽  
Weighting Method ◽  
Relational Degree ◽  
Matter Element Model ◽  
Combination Weighting Method

Risk assessment on geological hazards and zoning is the foundation of geological hazards prevention. To solve the problem of uncertainty and incompatibility between quantitative and qualitative indicators, and the deficiencies of the indexes weight method, this paper establishes the model for risk assessment on geological hazards binding the extension theory with the optimal combination weighting method. With the matter-element model of the extension theory, the weight coefficients are calculated by using the optimal combination weighting method that can effectively use the experience of expert judgement and accurately reflect the utility value of the data, and can properly resolve the problem of weight allocation. Then, through calculating the correlation function value and relational degree, determine the actual geological hazard grades of study area. Finally, this paper applies this model in Hanyin County of Shannxi Province and gets the predicting results compared with AHP method and entropy method, and the results conform to the fact. It is proved that extension theory based on optimal combination weighting method is quite effective and available in risk assessment on geological hazards.

scholarly journals Risk assessment of Cretaceous water inrush in the Ordos Basin based on the FAHP-EM

Water Policy ◽  
2021 ◽  
Author(s):  
Tingen Zhu ◽  
Wenping Li ◽  
Weichi Chen
Keyword(s):  
Risk Assessment ◽  
Coal Seam ◽  
Ordos Basin ◽  
Water Inrush ◽  
Entropy Method ◽  
Western China ◽  
Analytic Hierarchy ◽  
Water Head ◽  
The Ordos Basin ◽  
Seam Mining

Abstract A study on the risk of Cretaceous water inrush in the Ordos Basin in China is of great significance to the safe production and environmental protection of the western coal seam. This paper selects the following five key influencing factors for Cretaceous water inrush: the coal seam mining thickness, rock quality designation, distance between the top boundary of the water-conducting fracture zone and the bottom boundary of the Cretaceous system, the thickness of the Cretaceous aquifer, and the height of the water head. Furthermore, based on an analysis of geological and hydrogeological conditions of the Yingpanhao coal mine, the comprehensive weights of these factors were found using a fuzzy analytic hierarchy process and the entropy method (FAHP-EM) to be 0.27, 0.25, 0.22, 0.08, and 0.18, respectively. This paper describes the use of ArcGIS's spatial overlay analysis to create a risk assessment zoning map using these weightings. By comparing the evaluation results of the FAHP-EM and the water inrush coefficient method, it is shown that the FAHP-EM provides additional insight in assessing the risk of coal seam roof water inrush. The research results of this paper provide a theoretical basis for coal mining safety in western China to assess water inrush.

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