In this study, a drought impact inventory was constructed by collecting text-based data on South Korea from 1990 to 2019 (Table 1). In South Korea, past drought impact data are predominantly available from government reports. The National Drought Information Analysis Center (http://www.drought.go.kr/) was established in 2015 and manages a database of drought impact information related to the public water supply. In addition, data from news articles were collected using a web crawling method (Manning et al. 2008). The portal site Naver (http://www.naver.com) was selected as it is the most popular search engine in South Korea, providing many news articles. All news articles related to the drought were collected based on keywords, including drought, drought impact, drought damage, impact, and damage, using the ‘including’ filters on the portal site. Morphological analysis was performed on the articles collected, and nouns were extracted by removing unnecessary text, such as symbols and special characters. Subsequently, the extracted nouns were then compared with specific keywords from drought impact categories, such as fire, agriculture, livestock, green algae, and outage. The articles were classified based on relevant sectors, and the drought impacts were classified into categories of public water supply, wildfire, water quality, and agriculture and livestock farming, in line with the EDII technical report (Stahl et al. 2012) for 17 provinces (Figure 2). Finally, duplicate drought impact data were removed based on the date of occurrence of the drought impact.
Table 1

Sources used to construct the drought impact inventory

Reference typeSources
Database National Drought Information Portal www.drought.go.kr 
Korea Water Resources Corporation Emergency Water Supply Statistics Database, 2019 
Newspaper article Naver (largest search portal in South Korea) Web Crawling 
Governmental report Ministry of Environment National Drought Records Survey Report, 1995/2001 
Ministry of the Interior and Safety National Drought Information Statistics Report, 2018 
Korea Water Resources Corporation Drought Information Annual Report, 2018 
Reference typeSources
Database National Drought Information Portal www.drought.go.kr 
Korea Water Resources Corporation Emergency Water Supply Statistics Database, 2019 
Newspaper article Naver (largest search portal in South Korea) Web Crawling 
Governmental report Ministry of Environment National Drought Records Survey Report, 1995/2001 
Ministry of the Interior and Safety National Drought Information Statistics Report, 2018 
Korea Water Resources Corporation Drought Information Annual Report, 2018 
Figure 2

Study area and provinces within the study region. R1, Busan; R2, Chungbuk; R3, Chungnam; R4, Daegu; R5, Daejeon; R6, Gangwon; R7, Gwangju; R8, Gyeongbuk; R9, Gyeonggi; R10, Gyeongnam; R11, Incheon; R12, Jeju; R13, Jeonbuk; R14, Jeonnam; R15, Sejong; R16, Seoul; R17, Ulsan. The three regions that collected large drought impact data on public water supply are highlighted in gray.

Figure 2

Study area and provinces within the study region. R1, Busan; R2, Chungbuk; R3, Chungnam; R4, Daegu; R5, Daejeon; R6, Gangwon; R7, Gwangju; R8, Gyeongbuk; R9, Gyeonggi; R10, Gyeongnam; R11, Incheon; R12, Jeju; R13, Jeonbuk; R14, Jeonnam; R15, Sejong; R16, Seoul; R17, Ulsan. The three regions that collected large drought impact data on public water supply are highlighted in gray.

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