scholarly journals Computer Intelligent Comprehensive Rapid Risk Assessment System of Barrier Dam by Fuzzy Analytic Hierarchy Process and Big Data

2021 ◽  
Vol 2083 (4) ◽  
pp. 042046
Author(s):  
Danxuan Xue ◽  
Yan Duan ◽  
Weiwei Meng
Keyword(s):  
Risk Assessment ◽  
Economic Loss ◽  
Assessment System ◽  
Dam Failure ◽  
Hierarchy Theory ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Barrier Lake ◽  
Barrier Dam ◽  
The Stability

Abstract Barrier dam overall stability and dam break influence degree are the two risks. In order to comprehensively and quickly evaluate the risk of barrier dams, the dam height, the capacity of the barrier lake and the material composition of the dam body are selected as the stability evaluation indexes; the dam failure degree and the risk population and the potential economic loss are taken as the evaluation indexes. Based on the fuzzy hierarchy theory, this comprehensive and rapid risk assessment system of barrier dam is obtained, which is clear, intuitive and rapid, combining qualitative indexes and quantitative indexes.

scholarly journals Urban Flooding Risk Assessment Based on Numerical Simulation of Sub-catchment Area: A Case Study From Chengdu, China

2021 ◽  
Author(s):  
Xuejin Ying ◽  
Ting Ni ◽  
Mingxia Lu ◽  
Zongmin Li ◽  
Yi Lu ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Evaluation Method ◽  
Flood Hazard ◽  
Evaluation Model ◽  
Assessment System ◽  
Urban Flooding ◽  
Fuzzy Evaluation ◽  
Evaluation Indexes ◽  
Flooding Disaster ◽  
Flooding Risk

Abstract Urbanization and climate change usually result in frequent urban flooding. Since the floods cannot be avoided, the scenario simulation combined with risk analysis is an effective way to assess the disaster level and reduce direct damage loss when facing the emergency management problems. Different from the whole city dimension, the paper proposed a sub-catchment multi-index hesitant fuzzy evaluation model for the community planning level, and takes Jinjiang District of Chengdu city as the research object. Firstly, based on the PSR (Pressure-State-Response) model, the risk assessment system has been established in three aspects, including the current situation of urban drainage, the basic geographic information, and the social influence. Secondly, A total of 14 evaluation indexes were selected, among which the pressure index came from the calculation results of ArcGIS and EPASWMM5 model such as runoff coefficient, maximum water depth, etc. Thirdly, the expert hesitate fuzzy evaluation method was used to obtain the weight of 14 indexes of each sub-catchment. Finally, the 224 evaluation results were compared, and the urban flooding disaster risk map has been drawn. It is mainly concluded that 160 medium-higher risk areas were mainly concentrated in high built-up area in study area. Furthermore, the evaluation model is very useful as a decision-making tool for mitigation of the flood hazard and its associated risk.

Monitoring and Stability Evaluation of the Damaged Landslide Based on Multiple Monitoring Technologies

2021 ◽  
Author(s):  
Wei Huang ◽  
Chang Zhou ◽  
Hong Xu ◽  
Lichuan Chen ◽  
Yunping Liao ◽  
...  
Keyword(s):  
Rock Mass ◽  
Accumulation Rate ◽  
Airborne Lidar ◽  
Stability Evaluation ◽  
Displacement Monitoring ◽  
Rescue Work ◽  
Weak Layer ◽  
Barrier Lake ◽  
Barrier Dam ◽  
The Stability

Abstract The stability evaluation of the damaged landslide is important for rescue work and emergency operation. This paper investigated a predisposing geological emergence, inducing the factors and deformation processes of the Zhongbao landslide, which happened on 25 July 2020. The stability of the damaged landslide was evaluated by an integrated monitoring system consisting of ground-based radar, unmanned aerial vehicles, airborne Lidar, thermal infrared temperature monitoring, GNSS displacement monitoring, deep displacement monitoring and rainfall monitoring. The strata and weak layer controlled the landslide failure, and topography defined the boundary of the failed rock mass. A continually intensive rainfall caused the deformation and accelerated failure of the landslide. The shallow and steep deposit (Part I) firstly slid at a high velocity, and then pushed the rear part of the landslide (Part II) to deform, forming numerous cracks, and the rainfall infiltrated into the rock mass. Finally, the rock and soil mass sliding along the weak layer, a barrier dam and a barrier lake were formed. The monitoring results showed that after the landslide failure, there were still local collapse and deformation occurrence which threatened rescue work and barrier lake excavation. Therefore, the barrier dam wasn’t excavated until the accumulation rate gradually stabilized on July 28. Moreover, most of the reactivated deposits still accumulated in the transportation and source areas. Thus, in August, the displacement of the damaged landslide gradually accelerated in a stepwise manner, and responded strongly to rainfall, especially in the accumulation area, so that it was inferred that the damaged landslide could slide again and caused a more threatening and severe failure. The analysis results of the study area can provide references for the failure mechanism of a rainfall-induced landslide and the stability evaluation of a damaged landslide.

scholarly journals Water Inrush Risk Assessment Based on AHP and Advance Forecast Approach: A Case Study in the Micangshan Tunnel

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Tao Song ◽  
Jun Zeng ◽  
Jiaji Ma ◽  
Chunchi Ma ◽  
Tianbin Li ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Evaluation Model ◽  
Water Inrush ◽  
Prediction Method ◽  
Assessment Method ◽  
Early Assessment ◽  
Analytic Hierarchy ◽  
Effective Prevention ◽  
Evaluation Indexes ◽  
Tunnel Design

Water inrush is a serious geological disaster in tunnel. For the effective prevention and control of the occurrence of water inrush, a static-dynamic water inrush risk assessment method is proposed by considering the Micangshan tunnel as an example. First, four possible types of water inrush phenomenon are identified based on the geological and hydrogeological conditions of the tunnel: water inrush in water-bearing cracks, fault fracture zones, karst pipelines, and karst caves. Next, evaluation indexes that affect water inrush are determined. By combining the index weight value calculated by analytic hierarchy process (AHP) with the index quantitative value, the static water inrush disaster evaluation model is established, which provides a basis for tunnel design. Finally, with the combination of the static evaluation model and advanced forecast method, a dynamic risk prediction method of water inrush is established, which provides guidance for safe construction. The results confirm that the proposed method is a reliable theoretical basis for early assessment and prediction of tunnel water inrush disasters.

scholarly journals Emergency Survey and Stability Analysis of a Rainfall-Induced Soil-Rock Mixture Landslide at Chongqing City, China

2021 ◽  
Vol 9 ◽  
Author(s):  
Chang Zhou ◽  
Dong Ai ◽  
Wei Huang ◽  
Huiyuan Xu ◽  
Liwen Ma ◽  
...  
Keyword(s):  
Rock Mass ◽  
Stability Analysis ◽  
Airborne Lidar ◽  
Displacement Monitoring ◽  
Rescue Work ◽  
Weak Layer ◽  
Barrier Lake ◽  
Barrier Dam ◽  
The Stability ◽  
Landslide Debris

The stability analysis of damaged landslides and unstable debris is important for rescue work and emergency operations. This paper investigates a predisposed geological emergence, inducing the factors and deformation processes of the Zhongbao landslide, which happened on July 25, 2020. The stability of the landslide debris was evaluated by an integrated monitoring system consisting of ground-based radar, unmanned aerial vehicles, airborne Lidar, thermal infrared temperature monitoring, GNSS displacement monitoring, deep displacement monitoring, and rainfall monitoring. The strata and weak layer controlled the landslide failure, and topography defined the boundary of the failed rock mass. A continually intensive rainfall caused the deformation and accelerated failure of the landslide. The shallow and steep deposit (Part I) firstly slid at a high velocity, and then pushed the rear part of the landslide (Part II) to deform, forming numerous cracks, which accelerated the rainfall infiltrating into the rock mass. The moisture content increase could decrease the strength of the shale rock within the bedding planes. Finally, with the rock and soil mass sliding along the weak layer, a barrier dam and a barrier lake were formed. The monitoring and numerical simulation results showed that after the landslide failure, there was still local collapse and deformation occurrences which threatened rescue work and barrier lake excavation, and the stability of the accumulation area gradually decreased as the rainfall increased. Therefore, the barrier dam was not excavated until the accumulation rate gradually stabilized on July 28. Moreover, most of the reactivated deposits still accumulated in the transportation and source areas. Thus, in August, the displacement of the landslide debris gradually accelerated in a stepwise manner, and responded strongly to rainfall, especially in the accumulation area, so that it was inferred that the damaged landslide could slide again and cause a more threatening and severe failure. The analysis results of the study area can provide references for the failure mechanism of a rainfall-induced landslide and the stability evaluation of a damaged landslide.

Engineering of Xinjiang Non Electricity Area and the Project Risk Assessment

2013 ◽  
Vol 411-414 ◽  
pp. 2537-2541
Author(s):  
Yuan Sheng Huang ◽  
Chun Yan Jia
Keyword(s):  
Risk Assessment ◽  
Economic Development ◽  
Analytic Hierarchy Process ◽  
Daily Life ◽  
Good Choice ◽  
Analytic Hierarchy ◽  
Project Risk ◽  
New Energy ◽  
The Stability ◽  
Hierarchy Process

By the end of 2010, Xinjiang has 2754 000 families (10753 000 population) who are not allowable to use electricity. This project is related to the economic development of these areas and is of great importance to enhance people,s welfare. It is also an important project in the Twelfth Five-Year plan. This paper supplies us two realization modes for non electricity area through electric grid extension and new energy power. It is appropriate to seek help from the main grid to extend electricity problems and ensure the stability and security of the electricity in these areas, in which population is relatively dense, or places are good prospects for the development or mineral rich. But for a considerable number of scattered or not fixed farmers and herdsmen, the utilization of new energy to realize the power of their daily life is a good choice. On this basis, this paper carried out the risk assessment of the implementation of the project by using fuzzy analytic hierarchy process.

scholarly journals Set pair analysis for karst waterlogging risk assessment based on AHP and entropy weight

2017 ◽  
Vol 49 (4) ◽  
pp. 1143-1155 ◽  
Author(s):  
Jiajun Zeng ◽  
Guoru Huang
Keyword(s):  
Risk Assessment ◽  
Geographical Information ◽  
Risk Indicators ◽  
Set Pair Analysis ◽  
Entropy Weight ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Indexing System ◽  
Disaster Assessment ◽  
Pair Analysis

Abstract Karst waterlogging is a natural disaster that occurs frequently and it adversely affects the social and economic development of affected areas. An analysis of the causes of karst waterlogging with respect to climate and topography can serve as a foundation for disaster assessment and prevention. In this study, a karst waterlogging risk assessment indexing system was established. The system was based on a comprehensive analysis of risk factors, including the severity of the disaster and the vulnerability of the affected area. DeBao County in GuangXi was used as the study area. Nine risk indicators were chosen as evaluation indexes and combination weights were divided into subjective and objective weights based on the analytic hierarchy process (AHP) and entropy weight. A geographical information system (GIS) was applied to help with the calculations of the set pair analysis (SPA) and to pile up the layers of the evaluation indicators. Then, a risk rating map was drawn using GIS techniques. The results showed that the high risk locations were mainly distributed in the center of DeBao County; therefore, the map could be used as reference for the prevention and management of karst waterlogging risk.

Fuzzy hierarchy analytic method of enterprise supply chain financial risk

2021 ◽  
pp. 1-10
Author(s):  
Huali Deng ◽  
Aoduo Zhang
Keyword(s):  
Risk Assessment ◽  
Supply Chain ◽  
Analytic Hierarchy Process ◽  
Financial Risk ◽  
Assessment System ◽  
Fuzzy Analytic Hierarchy Process ◽  
Financial Risks ◽  
Analytic Hierarchy ◽  
The Impact ◽  
Hierarchy Process

Supply chain finance refers to one or more companies upstream and downstream of the industrial supply chain. According to the core company of each node, based on actual transactions, use customized and standardized financing transaction methods to control capital flows or control assets. The right to provide comprehensive financial products and services between supply chain nodes. This article only needs to introduce the financial risk analysis of the enterprise supply chain based on the fuzzy analytic hierarchy process. This paper proposes a fuzzy analytic hierarchy process, which uses a combination of qualitative and quantitative risk assessment methods to assess financial risks, and designs a financial risk assessment system by constructing a fuzzy judgment matrix. It also proposes a comprehensive judgment of the financial risk assessment method. The impact of various risk factors on financial services provides a basis for risk prevention. The experimental results of this paper show that the fuzzy analytic hierarchy process evaluation method is relatively objective and can effectively evaluate the financial risks of the enterprise supply chain. From the weight analysis, it can be concluded that the technical risk weight value is 0.47, which accounts for the largest proportion and is the most important risk.

Research on Vulnerability Assessment System of Complicated Power System

2011 ◽  
Vol 204-210 ◽  
pp. 622-626 ◽  
Author(s):  
Bo Wang ◽  
Da Hai You ◽  
Xiang Gen Yin
Keyword(s):  
Power System ◽  
Vulnerability Assessment ◽  
Assessment System ◽  
Large Area ◽  
Power Outages ◽  
Analytic Hierarchy ◽  
Factors Analysis ◽  
The Social ◽  
The Government ◽  
The Stability

The factors which lead to large-area power outages are more than ever, when the complexity of the expansion power system is increasing. Therefore, it is important to assess the vulnerability of the complicated power system. This paper first proposes an objective, practical and adaptive vulnerability assessment system of complicated power system by use of Analytic Hierarchy Process, which based on multi-factors analysis of large-area outages. This system can find out the vulnerability point of the power system，and take advantages of the government, who can over-all plan, correspond and organize the social resource to reduce the vulnerability of power system and prevent large-area power outages, and the power enterprises who can maintaining the stability of power system by technology. Finally, the paper gives an assessment example of provincial power system.

scholarly journals Environmental Risk Assessment System for Phosphogypsum Tailing Dams

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Xin Sun ◽  
Ping Ning ◽  
Xiaolong Tang ◽  
Honghong Yi ◽  
Kai Li ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Environmental Risk ◽  
Environmental Risk Assessment ◽  
Management Strategies ◽  
Assessment Method ◽  
Pollution Source ◽  
Assessment System ◽  
Analytic Hierarchy ◽  
Risk Characteristics ◽  
Tailing Dams

This paper may be of particular interest to the readers as it provides a new environmental risk assessment system for phosphogypsum tailing dams. In this paper, we studied the phosphogypsum tailing dams which include characteristics of the pollution source, environmental risk characteristics and evaluation requirements to identify the applicable environmental risk assessment methods. Two analytical methods, that is, the analytic hierarchy process (AHP) and fuzzy logic, were used to handle the complexity of the environmental and nonquantitative data. Using our assessment method, different risk factors can be ranked according to their contributions to the environmental risk, thereby allowing the calculation of their relative priorities during decision making. Thus, environmental decision-makers can use this approach to develop alternative management strategies for proposed, ongoing, and completed PG tailing dams.

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