Analysis on Establishment of Strategies for Flood Risk Evaluation and Flood Defense Criteria against Climate Change(Ⅰ)
- Author Jung, Kichul
- Researchers Lee, Moonhwan; Han, Daeho; Jeong, Ayoung; Yoo, Jonghyun
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Date
2022-12-31
Ⅰ. Introduction
1. Climate change and flood disaster
ㅇA report published by the Korea Meteorological Administration (KMA, 2015) stated that global surface temperature is expected to increase throughout the 21st century and that several regions will be highly likely to encounter an increase in the frequency and duration of heat waves and the frequency and intensity of extreme precipitation events.
ㅇThis report also indicated that temperature and precipitation will increase by 3 to 14% according to a degree of greenhouse gas emissions and that such increase at the end of the 21st century from 2081 to 2100 will be more considerable than that at the beginning of the 21st century from 2021 to 2040. In this regard, it is predicted that damage caused by disasters, such as flooding, will increase gradually.
ㅇThe occurrence of localized heavy rainfalls in South Korea (Korea) has shown a trend of increase since the early 1900s. Based on this trend, it is analyzed that the scale of flood damage may increase due to extremely heavy rainfall in a short period and localized torrential rainfall.
ㅇHeavy rain that poured in the last ten years (from 2011 to 2020) resulted in loss of lives of 139 people, and the death toll increases to 182 persons when the number of deaths caused by flooding is also counted. Heavy rain that poured in the corresponding period caused damage equivalent to 2.1557 trillion won (KRW), and the total cost of damage increases to 4.1126 trillion won when damage caused by flooding is also counted. As such, Korea has constantly suffered from damage caused by flooding.
1. Climate change and flood disaster
ㅇA report published by the Korea Meteorological Administration (KMA, 2015) stated that global surface temperature is expected to increase throughout the 21st century and that several regions will be highly likely to encounter an increase in the frequency and duration of heat waves and the frequency and intensity of extreme precipitation events.
ㅇThis report also indicated that temperature and precipitation will increase by 3 to 14% according to a degree of greenhouse gas emissions and that such increase at the end of the 21st century from 2081 to 2100 will be more considerable than that at the beginning of the 21st century from 2021 to 2040. In this regard, it is predicted that damage caused by disasters, such as flooding, will increase gradually.
ㅇThe occurrence of localized heavy rainfalls in South Korea (Korea) has shown a trend of increase since the early 1900s. Based on this trend, it is analyzed that the scale of flood damage may increase due to extremely heavy rainfall in a short period and localized torrential rainfall.
ㅇHeavy rain that poured in the last ten years (from 2011 to 2020) resulted in loss of lives of 139 people, and the death toll increases to 182 persons when the number of deaths caused by flooding is also counted. Heavy rain that poured in the corresponding period caused damage equivalent to 2.1557 trillion won (KRW), and the total cost of damage increases to 4.1126 trillion won when damage caused by flooding is also counted. As such, Korea has constantly suffered from damage caused by flooding.