# OneMap Drought Monitoring Analysis Based on Statistical Models
## 3 Results and Discussion
### Evaluation of the Applicability of the Integrated Drought Map  
Using the 2019 drought forecast and warning operation information, drought monitoring information by field was illustrated, and the applicability of the integrated drought map calculated based on the drought index was evaluated (Figure 8). In 2019, the cumulative  
Figure 6: Results of correlation analysis for the application of the integrated drought index. Figure 7: Comparison of drought index calculation results based on satellite data and ground data in 2017.  
precipitation from January to July was 569.5 mm, corresponding to 75.8% and 78.4% of the cumulative precipitation in a normal year and the previous year, respectively. A total of 15 cities and counties were subjected to limited water supply, and the number of victims of transport water supply was estimated to be 9789. Based on the operation information of the drought forecasts and warnings, a caution level was announced, mainly in the central region, from June to September, which gradually eased after October. According to the spatial illustration results of SPI, a meteorological drought index based on ground data, the attention level was issued in May, and an alert level was issued in the central region in August. Similar to the forecast and warning operation information, the drought stage gradually eased after October. In the case of the operation of agricultural drought forecasts and warnings, caution-level was issued in some areas in July and August, but most cities, municipalities, and districts did not exhibit any particular changes. In the case of the SDI drought index based on ground data calculated from agricultural reservoir information, the alert and severity stages occurred mainly in the central region in July and August. The information on the operation of hydrological drought forecasts and warnings showed that attention and caution levels were issued in the southwestern part of the Han River and the Chungcheong-do area beginning in August. However, in the case of ground data-based hydrological drought indices SDI and SRI, attention-level warnings were issued in the central region beginning in May, and severe warnings occurred in July and August. As drought intensifies due to climate change and the frequent disruption of the supply of agricultural, living, and industrial water, the government of South Korea is advancing various measures to strengthen the response to drought. Accordingly, since 2016, ministries such as the Ministry of Public Administration and Security, the Ministry of Agriculture, Food and Rural Affairs, the Ministry of Environment, and the Meteorological Administration have formed a joint task force to examine the government's drought response procedures, announce drought forecasts and warnings, and prepare comprehensive drought response measures. In 2019, the Ministry of Public Administration and Security decided to reflect drought information in national statistics with Statistics Korea and various related ministries and has been publishing collections of statistics since 2020. Furthermore, the National Disaster Management Research Institute of the Ministry  
Figure 8: Evaluation and analysis of the OneMap drought index drought based on ground data (2019 drought forecast and warning operation information). of Public Administration and Security is planning measures to establish an integrated national drought information forecast and warning platform, to improve the accuracy of water supply evaluation, enabling efficient drought information management. However, since it is difficult to intuitively understand drought situations because various maps are provided based on the division of business fields under the authority of each ministry, technology is needed to integrate the available information and comprehensively assess drought situations.