scholarly journals Assessment of Aggregation Frameworks for Composite Indicators in Measuring Flood Vulnerability to Climate Change

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Hyun Il Choi
Keyword(s):  
Climate Change ◽  
Comparative Analysis ◽  
Vulnerability Assessment ◽  
Coastal Areas ◽  
Composite Indicators ◽  
Flood Vulnerability ◽  
Vulnerability To Climate Change ◽  
Assessment Outcomes ◽  
The Republic ◽  
Flood Vulnerability Assessment

AbstractThe IPCC Third Assessment Report presents a conceptual framework for vulnerability to climate change with the three attribute components of exposure, sensitivity, and coping. Since the vulnerability assessments have been conducted mainly by the composite indicators aggregated from the IPCC’s components, it is necessary to assess aggregation frameworks for constructing the composite indicators that have an influence on vulnerability assessment outcomes. This study therefore investigates the robustness of assessment outcomes for flood vulnerability to climate change through a comparative analysis of the six vulnerability indicators aggregated from the IPCC’s components by the conventional aggregation frameworks. The comparative analysis has been illustrated through both the possible combinations of reference values for vulnerability attribute components and a case study on the flood vulnerability assessment to climate change for coastal areas in the Republic of Korea. The study demonstrates that there can be large fluctuations and reversals in ranking orders across the six vulnerability outcomes by different aggregation frameworks. It concludes that for flood vulnerability assessment to climate change in coastal areas, the vulnerability indicator needs to be aggregated by a multiplicative utility function from all the three assessment components with positive elasticity to vulnerability.

scholarly journals Comparative Analysis of Flood Vulnerability Indicators by Aggregation Frameworks for the IPCC’s Assessment Components to Climate Change

2019 ◽  
Vol 9 (11) ◽  
pp. 2321 ◽  
Author(s):  
Jong Seok Lee ◽  
Hyun Il Choi
Keyword(s):  
Climate Change ◽  
Comparative Analysis ◽  
Composite Indicator ◽  
Composite Indicators ◽  
Causality Analysis ◽  
Intergovernmental Panel ◽  
Flood Vulnerability ◽  
Relative Contribution ◽  
Vulnerability To Climate Change ◽  
Vulnerability Indicators

As severe flood damages have been increasing due to climate change, the flood vulnerability assessment is needed in the flood mitigation plans to cope with climate-related flood disasters. Since the Intergovernmental Panel on Climate Change Third Assessment Report (IPCC TAR) presented the three assessment components, such as exposure, sensitivity, and adaptability for the vulnerability to climate change, several aggregation frameworks have been used to compile individual components into the composite indicators to measure the flood vulnerability. It is therefore necessary to select an appropriate aggregation framework for the flood vulnerability assessments because the aggregation frameworks can have a large influence on the composite indicator outcomes. For a comparative analysis of flood vulnerability indicators across different aggregation frameworks for the IPCC’s assessment components, the composite indicators are derived by four representative types of aggregation frameworks with all the same proxy variable set in the Republic of Korea. It is found in the study site that there is a key driver component of the composite indicator outcomes and the flood vulnerability outcomes largely depend on whether the key component is treated independently or dependently in each aggregation framework. It is concluded that the selection of an aggregation framework can be based on the correlation and causality analysis to determine the relative contribution of the assessment components to the overall performance of the composite indicators across different aggregation frameworks.

scholarly journals Flood Vulnerability Assessment for Prioritizing and Evaluating Rehabilitation of Ungauged Reservoirs Considering Climate Change

Water ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1901
Author(s):  
Sang-Min Jun ◽  
Moon-Seong Kang ◽  
Soonho Hwang ◽  
Jihoon Park ◽  
Jung-Hun Song
Keyword(s):  
Climate Change ◽  
Adaptive Capacity ◽  
Vulnerability Assessment ◽  
Hydraulic Structure ◽  
Vulnerability Index ◽  
Hydraulic Structures ◽  
Flood Vulnerability ◽  
Before And After ◽  
Flood Vulnerability Assessment ◽  
Flood Vulnerability Index

The objective of this research was to apply the flood vulnerability assessment to ungauged reservoirs for prioritizing and evaluating the reservoir rehabilitation according to climate change. The flood vulnerability index (FVI) can quantitatively compare the flood vulnerabilities of the analysis targets and can be used for the relative comparison of hydraulic structures to determine the reinforcement priority. In this study, we proposed a simple FVI that contained exposure and adaptive capacity of the hydraulic structure. We selected ten dam heightening reservoirs in Korea and constructed data for flood vulnerability assessment. The FVI was calculated before and after the dam heightening to analyze the priority and effect of reservoir rehabilitation under climate change. Flood vulnerability indices were estimated for four periods (1995s: 1981–2010, 2025s: 2011–2040, 2055s: 2041–2070, 2085s: 2071–2100) and before/after the dam heightening project. As a result, flood vulnerability indices decreased after the dam heightening project for all reservoirs, and the indices have increasing tendencies in the future. The indices developed in this study can be useful to determine the priority and to evaluate the effect of rehabilitation for hydraulic structures.

Development of a Flood Vulnerability Assessment Methodology for Coastal Areas

2017 ◽  
Vol 17 (2) ◽  
pp. 397-402 ◽  
Author(s):  
Jong Seok Lee ◽  
◽  
Soojeong Myeong ◽  
Hyun Il Choi ◽  
◽  
...  
Keyword(s):  
Vulnerability Assessment ◽  
Coastal Areas ◽  
Assessment Methodology ◽  
Flood Vulnerability ◽  
Flood Vulnerability Assessment
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