• Title, Summary, Keyword: vulnerability assessment

Search Result 433, Processing Time 0.052 seconds

Urban Flood Vulnerability and Risk Assessments for Applying to Urban Planning (도시계획 적용을 위한 도시홍수 취약성 및 리스크 평가)

  • Lee, Sang-hyeok;Kang, Jung Eun
    • Journal of the Korea Planners Association
    • /
    • v.53 no.5
    • /
    • pp.185-206
    • /
    • 2018
  • This study conducted two flood assessments and compared their methods, procedures, and outcomes for applying to urban planning: a flood vulnerability assessment in accordance with the Climate Change Vulnerability Assessment adopted by the government and a probabilistic risk assessment stressed by IPCC. The flood vulnerability assessment employed the indicator method based on the manual and guidelines. The probabilistic risk was defined as a product of the probability of occurrence and its effect. It used Markov Chain Monte Carlo (MCMC) simulation, which is effective in random number generation and machine learning based on the Bayesian concept. The results of two evaluations focused on Busan show that while spatial distributions of risk areas are quite similar, risk area calculated by flood vulnerability assessment is a little larger than risk assessment due to different units of analysis, used data, and assessment methodology. Risk assessment provides more accurate results, but assessment method is complicated, while vulnerability assessment is easy to use, results cannot be quantitatively validated. Therefore, the combination of vulnerability and risk assessment is considered meaningful as it could improve existing flood assessments and contribute to decision making to establish safer cities.

Design of Climate Change Vulnerability Assessment Database System for Heat wave and Drought (폭염과 가뭄을 위한 기후변화 취약성 평가 데이터베이스 시스템 설계)

  • Jung, Eun-Hwa;Kim, Chul-Won;Park, Jong-Hoon
    • The Journal of the Korea institute of electronic communication sciences
    • /
    • v.13 no.4
    • /
    • pp.813-818
    • /
    • 2018
  • In this paper, the assessment items were selected for water by drought, water quality by drought, and thermal diseases by heat wave. We described the selection background for these assessment items. and then we weighted the selected vulnerability assessment items. The vulnerability assessment procedures also describe the calculation methods applied in phases and the actual cases. The vulnerability assessment database was analyzed and a climate change vulnerability assessment system for heat waves and droughts using these vulnerability assessment procedures was designed.

Vulnerability Assessment and Analysis of Gangwon Provincial Forest Sector in Response to Climate Change (기후변화 대비 강원 지역 산림부문 현황 분석 및 취약성 평가)

  • Chae, Hee-Mun;Lee, Hyun-Ju;Um, Gi-Jeung
    • Journal of Forest and Environmental Science
    • /
    • v.28 no.2
    • /
    • pp.106-117
    • /
    • 2012
  • In an effort to analyze the impact of climate change, Gangwon provincial forest was divided into three sectors; forest ecology, forest disaster, and forest productivity and analysis of their current status from 2000 to 2009 and vulnerability assessment by climate change has been carried in this study. In case of vulnerability assessment, except for the forest ecology, forest disaster (forest fires and forest pests) and forest productivity sectors were analyzed in current status, the year of 2020, and 2050. It turned out that vulnerability of forest fires in the field of disaster would become worse and forest pests also would make more impact even though there is some variation in different areas. In case of the vulnerability of forest productivity there would be not a big difference in the future compared with current vulnerability. Systematic research on the sensitivity index used for vulnerability assessment is necessary since vulnerability assessment result greatly depends on the use of climate exposure index and adaptive capacity index.

A Cost-Optimization Scheme Using Security Vulnerability Measurement for Efficient Security Enhancement

  • Park, Jun-Young;Huh, Eui-Nam
    • Journal of Information Processing Systems
    • /
    • v.16 no.1
    • /
    • pp.61-82
    • /
    • 2020
  • The security risk management used by some service providers is not appropriate for effective security enhancement. The reason is that the security risk management methods did not take into account the opinions of security experts, types of service, and security vulnerability-based risk assessment. Moreover, the security risk assessment method, which has a great influence on the risk treatment method in an information security risk assessment model, should be security risk assessment for fine-grained risk assessment, considering security vulnerability rather than security threat. Therefore, we proposed an improved information security risk management model and methods that consider vulnerability-based risk assessment and mitigation to enhance security controls considering limited security budget. Moreover, we can evaluate the security cost allocation strategies based on security vulnerability measurement that consider the security weight.

Vulnerability Assessment of a Large Sized Power System Using Neural Network Considering Various Feature Extraction Methods

  • Haidar, Ahmed M. A;Mohamed, Azah;Hussian, Aini
    • Journal of Electrical Engineering and Technology
    • /
    • v.3 no.2
    • /
    • pp.167-176
    • /
    • 2008
  • Vulnerability assessment of power systems is important so as to determine their ability to continue to provide service in case of any unforeseen catastrophic contingency such as power system component failures, communication system failures, human operator error, and natural calamity. An approach towards the development of on-line power system vulnerability assessment is by means of using an artificial neural network(ANN), which is being used successfully in many areas of power systems because of its ability to handle the fusion of multiple sources of data and information. An important consideration when applying ANN in power system vulnerability assessment is the proper selection and dimension reduction of training features. This paper aims to investigate the effect of using various feature extraction methods on the performance of ANN as well as to evaluate and compare the efficiency of the proposed feature extraction method named as neural network weight extraction. For assessing vulnerability of power systems, a vulnerability index based on power system loss is used and considered as the ANN output. To illustrate the effectiveness of ANN considering various feature extraction methods for vulnerability assessment on a large sized power system, it is verified on the IEEE 300-bus test system.

Vulnerability assessment of drought of small island areas in Korea (읍면 단위 도서지역의 가뭄 취약성 평가)

  • Shim, Intae;Hong, Bongchang;Kim, Eunju;Hwang, Tae-Mun
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.33 no.5
    • /
    • pp.341-351
    • /
    • 2019
  • The purpose of this study was to evaluate vulnerability of drought in small island areas. Vulnerability assessment factors of drought were selected by applying the factor analysis. Ninety Eup/Myon areas in small island were evaluated to vulnerability of drought by entropy method adapting objective weights. Vulnerability consisted of climate exposure, sensitivity, and adaptive capacity. A total of 22 indicators were used to evaluate and analyze vulnerability of drought in small island areas. The results of entropy method showed that winter rainfall, no rainfall days, agricultural population rate, cultivation area rate, water supply rate and groundwater capacity have a significant impact on drought assessment. The overall assessment of vulnerability indicated that Seodo-myeon Ganghwa-gun, Seolcheon-myeon Namhae-gun and Samsan-myeon Ganghwa-gun were the most vulnerable to drought. Especially Ganghwa-gun should be considered policy priority to establish drought measures in the future, because it has a high vulnerability of drought.

An Assessment of Groundwater Contamination Vulnerability and Priority Areas for Groundwater Management Using GIS and Analytic Hierarchy Process (GIS 및 계층분석법을 이용한 지하수 오염 취약성 평가 및 관리 우선 대상 지역 평가)

  • LEE, Moung-Jin;HYUN, Yun-Jung;HWANG, Sang-Il
    • Journal of the Korean Association of Geographic Information Studies
    • /
    • v.18 no.3
    • /
    • pp.35-51
    • /
    • 2015
  • The purpose of this study is to improve the previous groundwater contamination vulnerability assessment method, apply it to the study area, and select priority areas for groundwater management based on the quantitative analysis of groundwater contamination vulnerability. For this purpose, first, the previous 'potential contamination' based on groundwater contamination vulnerability assessment method was upgraded to the methodology considering 'adaptation capacity' which reduced contamination. Second, the weight of groundwater contamination vulnerability assessment factors was calculated based on the analytical hierarchy process(AHP) and the result of survey targeting groundwater experts. Third, Gyeonggi-do was selected as the study area and the improved methodology and weight were implemented with GIS and actual groundwater contamination vulnerability assessment was carried out. Fourth, the priority area for groundwater contamination management was selected based on the quantitative groundwater contamination vulnerability assessment diagram. The improved detailed groundwater contamination vulnerability assessment factors in this study were a total of 15 factors, and 15 factors were analyzed as new and improved weight with higher 'adaptation capacity' than the assessment factor corresponding to the previous 'potential contamination' in the weight calculation result using AHP. Also, the result of groundwater contamination vulnerability assessment in Gyeonggi Province using GIS showed that Goyang and Gwangmyeong which were adjacent to Seoul had a high groundwater contamination vulnerability and Pocheon and Yangpyeong County had a relatively low groundwater contamination vulnerability. In this study, the previous groundwater contamination vulnerability assessment was improved and applied to study areas actually. The result of this study can be utilized both directly and indirectly for the groundwater management master plan at national and local government level in the future.

Development of a Climate Change Vulnerability Assessment Analysis Tool: Based on the Vulnerability Assessment of Forest Fires in Chungcheongnam-do (기후변화 취약성 평가 분석도구 개발에 관한 연구: 충남지역 산불 취약성을 중심으로)

  • Yoon, Soo Hyang;Lee, Sang Sin
    • Journal of Climate Change Research
    • /
    • v.8 no.3
    • /
    • pp.275-285
    • /
    • 2017
  • Chungnam region has established and executed the 2nd Climate Change Adaptation Initiative Execution Plan (2017~2021) based on the Framework Act on Low Carbon, Green Growth. The Execution Plan is established based on the results of climate change vulnerability assessment using the CCGIS, LCCGIS, and VESTAP analysis tools. However, the previously developed climate change vulnerability assessment tools (CCGIS, LCCGIS, VESTAP) cannot reflect the local records and the items and indices of new assessment. Therefore, this study developed a prototype of climate change vulnerability assessment analysis tool that, unlike the previous analysis tools, designs the items and indices considering the local characteristics and allows analysis of grid units. The prototype was used to simulate the vulnerability to forest fires of eight cities and seven towns in Chungcheongnam-do Province in the 2010s, 2020s, and 2050s based on the RCP (Representative Concentration Pathways) 8.5 Scenario provided by the Korea Meteorological Administration. Based on the analysis, Chungcheongnam-do Province's vulnerability to forest fires in the 2010s was highest in Seocheon-gun (0.201), followed by Gyeryong-si (0.173) and Buyeo-gun (0.173) and the future prospects in the 2050s was highest in Seocheon-gun (0.179), followed by Gyeryong-si (0.169) and Buyeo-gun (0.154). The area with highest vulnerability to forest fires in Chungcheongnam-do Province was Biin-myeon, Seocheon-gun and the area may become most vulnerable was Pangyo-myeon, Seocheon-gun. The prototype and the results of analysis may be used to establish the directions and strategies in regards to the vulnerability to wild fires to secure each local government's 2nd execution plan and attainability.

Climate Change Adaptive Implementation Assessment Proposal for Local Governments Utilizing Vulnerability Index

  • Lee, Sangsin
    • Journal of Forest and Environmental Science
    • /
    • v.35 no.1
    • /
    • pp.47-53
    • /
    • 2019
  • This study applies the concept of climate change vulnerability assessment in order to suggest climate change adaptation effects in a quantitative manner, given that previous studies have hitherto rely on qualitative assessment, as climate change adaptive policies are currently being implemented by local governments of Korea. The vulnerability assessment tool used in this study is VESTAP ("Vulnerability assESsment Tool to build a climate change Adaptation Plan"), which was developed by the Korea Adaptation Center for Climate Change (KACCC), and applied to gauge the vulnerability of pine trees to diseases and pests within Chungcheongnam-do. The climate change adaptation project for vulnerability improvement was assessed only in terms of forest disaster prevention and change in regional climate change vulnerabilities within 16 regions of Chungcheongnam-do as the result of 2016 Climate Change Adaptation Project (Forest Disaster Prevention Project). As a result, it was observed that climate change adaptive capacity has improved according to change in the area of forestland with disaster prevention, and the vulnerability indicator decreased, confirming the impact of the climate change adaptation (forest disaster prevention) project. Also, analysis of regional climate change adaptation project scales and change in vulnerabilities allowed us to determine the regional propriety of climate change adaptation (forest disaster prevention) projects launched in 2016.

Vulnerability assessment index at process-level for the identification of adaptive strategies in wastewater treatment plants under climate change

  • Kim, Dongwoo;Jacome, Gabriel;Lee, SeungChul;Moya, Wladimir;Nam, KiJeon;Yoo, Changkyoo
    • The Korean Journal of Chemical Engineering
    • /
    • v.34 no.12
    • /
    • pp.3054-3066
    • /
    • 2017
  • Many studies have been conducted on climate change vulnerability assessments to develop adaptive strategies for climate change on a national or global scale. The development of an assessment tool for climate change on a process-level is necessary for evaluating vulnerability and to suggest an effective adaptive strategy in wastewater treatment plants (WWTP). Therefore, we proposed a vulnerability assessment index at the process-level in a WWTP to evaluate adaptive strategies for climate change in this study. The suggested process-level vulnerability assessment index is based on three performance WWTP indices: the effluent quality index (EQI), global warming potential (GWP), and operational cost index (OCI). Four different advanced WWTP processes were evaluated using the suggested vulnerability assessment index based on the A2 scenario, which is one of the carbon emission scenarios making predictions out to 2100 developed by the intergovernmental panel on climate change (IPCC). The adaptive strategies were evaluated at four conventional treatment processes to see the improvement of vulnerability of their processes, where the changes of their vulnerabilities are compared together. Suggested adaptive strategies in case studies showed that the process-level vulnerabilities were significantly decreased in the anaerobic/anoxic/aerobic ($A_2O$) and Virginia initiative project (VIP) processes, especially during the flood and winter seasons. Therefore, it is expected that the proposed vulnerability assessment index can be useful as a decision-supporting tool for selecting the appropriate adaptive strategy for each process.