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 An Application of Fuzzy Analytic Hierarchy Process in Risk Evaluation Model

2021 ◽  
Vol 12 ◽  
Author(s):  
Geng Peng ◽  
Lu Han ◽  
Zeyan Liu ◽  
Yanyang Guo ◽  
Junai Yan ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Analytic Hierarchy Process ◽  
Evaluation Model ◽  
Fuzzy Analytic Hierarchy Process ◽  
Analytic Hierarchy ◽  
Land Conflicts ◽  
System A ◽  
Medium Level ◽  
Hierarchy Process ◽  
Controllability Index

Conflicts in land exploration are incisive social problems which have been the subject in many studies. Risk assessment of land conflicts is effective to resolve such problems. Specifically, fuzzy mathematics and the analytic hierarchy process were combined together to evaluate risk in land conflicts in our work, which is proved useful to solve uncertainty and imprecision problems. Based on the analysis of the principles for the risk assessment of a land conflicts index system, a set of risk assessment indexes using the fuzzy analytic hierarchy process (FAHP) was presented. The results show that the overall risk is at medium level, and the risk of the feasibility index and controllability index need to be paid more attention to. The contribution of this article is reflected in two aspects: (1) the application of FAHP in risk assessments of land conflicts is effective and valid; (2) it is helpful for governments to establish a stricter management system of work safety for conflicts in land exploration based on the risk assessment results.

scholarly journals Water Richness Zoning and Evaluation of the Coal Seam Roof Aquifer Based on AHP and Multisource Geological Information Fusion

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Ke Zhou
Keyword(s):  
Coal Seam ◽  
Coal Mine ◽  
Evaluation Model ◽  
Mine Safety ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Control Factors ◽  
Geological Information ◽  
Borehole Water ◽  
Water Disaster

Roof water disaster is one of the most serious disasters in the process of coal mine safety mining in China. The thickness of modern comprehensive mechanized coal mining is large, which has a great impact on the roof aquifer, and the threat degree of water disaster is also increasing. Therefore, the evaluation of the water richness of the roof aquifer is an important work for coal mine water prevention and control. In order to systematically evaluate the water-rich property of an aquifer in a coal seam roof, this paper couples multisource geological information based on an analytic hierarchy process (AHP). The characteristics of the roof aquifer, hydrogeology, and structure are determined to be the main control factors of K2 limestone water richness evaluation. Under the main control factors, seven independent water richness evaluation indexes, including aquifer depth, aquifer thickness, borehole water level, borehole water consumption, faults, folds, and collapse columns, are divided, and a normalized water richness coupling evaluation model is constructed, which realizes the zoning and evaluation of a water-rich aquifer in a coal seam roof.

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.

Safety Assessment for Single-Tower Self-Anchored Suspension Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 2738-2741 ◽  
Author(s):  
Xiao Fei Liang ◽  
Ying Chun Fu ◽  
Yue Xu
Keyword(s):  
Risk Factor ◽  
Safety Assessment ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Safety Evaluation ◽  
Suspension Bridge ◽  
Assessment Method ◽  
Grey Theory ◽  
Analytic Hierarchy ◽  
Risk Ranking

Connected with the practical construction and considering Structural properties of single-tower self-anchored suspension bridge, the multi-level safety evaluation model is established according to the main risk factor and weighting rate of risk factor is analyzed by the analytic hierarchy process. A safety assessment method with qualitative analysis and quantitative analysis is proposed based on the grey theory and fuzzy mathematics theory for the practical problem of multi-index comprehensive evaluation, and risk ranking is given.

Study on Evaluation Methods of Disciplines in Universities

2013 ◽  
Vol 423-426 ◽  
pp. 2930-2933
Author(s):  
Cong Jun Rao
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Scientific Research ◽  
Fuzzy Comprehensive Evaluation ◽  
First Grade ◽  
Evaluation Index System ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Research Achievement

The level and status of disciplines are the important indexes in universities. The evaluation of multiple disciplines plays an important role in the disciplines development. This paper mainly studied the problem of disciplines evaluation in higher education. Firstly, it established the evaluation index system with eight first-grade evaluation indexes, i.e., discipline construction, teaching award, research funding, the scientific research achievement award, team construction, scientific research, talent training, and initial investment, and then used the method of Analytic Hierarchy Process (AHP) to solve the weight of each index. Thirdly, it established a disciplinary evaluation model based on fuzzy comprehensive evaluation method, and analyzed the rationality of the model. The study in this paper provides a new way for the evaluation of university disciplines.

scholarly journals A Bayesian Network-Based Integrated for Flood Risk Assessment (InFRA)

2019 ◽  
Vol 11 (13) ◽  
pp. 3733 ◽  
Author(s):  
Hongjun Joo ◽  
Changhyun Choi ◽  
Jungwook Kim ◽  
Deokhwan Kim ◽  
Soojun Kim ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Bayesian Network ◽  
Disaster Management ◽  
Flood Risk ◽  
Principal Component ◽  
Assessment Method ◽  
Flood Damage ◽  
Flood Risk Assessment ◽  
Operating Characteristics ◽  
Analytic Hierarchy

Floods are natural disasters that should be considered a top priority in disaster management, and various methods have been developed to evaluate the risks. However, each method has different results and may confuse decision-makers in disaster management. In this study, a flood risk assessment method is proposed to integrate various methods to overcome these problems. Using factor analysis and principal component analysis (PCA), the leading indicators that affect flood damage were selected and weighted using three methods: the analytic hierarchy process (AHP), constant sum scale (CSS), and entropy. However, each method has flaws due to inconsistent weights. Therefore, a Bayesian network was used to present the integrated weights that reflect the characteristics of each method. Moreover, a relationship is proposed between the elements and the indicators based on the weights called the Integrated Index for Flood Risk Assessment (InFRA). InFRA and other assessment methods were compared by receiver operating characteristics (ROC)-area under curve (AUC) analysis. As a result, InFRA showed better applicability since InFRA was 0.67 and other methods were less than 0.5.

The Application of Fuzzy Comprehensive Evaluation in Risk Assessment of Incremental Launching Bridge

2012 ◽  
Vol 204-208 ◽  
pp. 2028-2033 ◽  
Author(s):  
Zhong Chu Tian ◽  
Lei Yang ◽  
Tian Yong Jiang
Keyword(s):  
Risk Assessment ◽  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Fuzzy Comprehensive Evaluation ◽  
Assessment Model ◽  
Analytic Hierarchy ◽  
Assessment Index ◽  
Comprehensive Evaluation Model ◽  
Assessment Index System ◽  
Hierarchy Process

The risk factors of continuous incremental launching bridge during construction stage are specialized. The risk in incremental launching stage is analyzed and identified. A risk assessment index system is built. A fuzzy comprehensive evaluation model is developed. The results obtained from the risk assessment model verifies the validity and practicality of the developed method by the combination of analytic hierarchy process and fuzzy mathematics theory. Moderate risk assessment results are developed to provide references for incremental launching construction method.

Evaluation and Forecasting: Urban Sustainable Development of Wuwei City in Gansu Province

2010 ◽  
Vol 113-116 ◽  
pp. 343-346 ◽  
Author(s):  
Hai Yang Shang ◽  
Fang Su
Keyword(s):  
Sustainable Development ◽  
Analytic Hierarchy Process ◽  
Future Development ◽  
Evaluation Model ◽  
Gansu Province ◽  
Experimental Results ◽  
Analytic Hierarchy ◽  
Evaluation Indexes ◽  
Urban Sustainable Development ◽  
Hierarchy Process

Evaluation for urban sustainable development is very significant to improve the future development of urban. The analytic hierarchy process (AHP) is very suitable for evaluation of urban sustainable development. In the study, AHP is applied to evaluate urban sustainable development. On the basis of analyzing the evaluation indexes, evaluation model for urban sustainable development is constructed based on AHP. And we take Wuwei city in Gansu province as an example to study the evaluation performance of AHP. The result of the urban sustainable development is getting better and better towards 2020. The experimental results indicate the effectiveness and correctness of the proposed method.

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