# Rainfall Standard of Disaster Prediction for Agricultural Droughs in S. Korea
## 5 Conclusions  
A drought is a natural disaster resulting from the decreasing rainfall attributable to long-term hydro-meteorological imbalance, affecting a range of areas including farming, living and some industries. Moreover, prolonged droughs cause water shortages, crop failure and depletion of reservoirs on a yearly or seasonal basis. In this study, we established integrated reference points of disaster-prediction rainfall for disaster prevention and reduction to help drought relief, based on South Korea's agricultural droughs. The rainfall criteria, considering the disaster prevention of agricultural drought, was compared to the annual rainfall amount of agricultural drought damage and the total annual rainfall of municipality by year for municipality and the whole country. The annual rainfall of agricultural drought damage was calculated by municipality to be higher than the national average. The annual rainfall of agricultural drought damage was analyzed to be 1199 mm for municipality and 1154 mm for the whole country. In addition, as a result of comparing with the annual average rainfall in the year when the agricultural drought damage occurred, it was observed that the difference in rainfall occurred 97 mm. Therefore, the rainfall considering the disaster prevention of agricultural drought was set to be less than about 1200 mm annual rainfall or about 100 mm less than the previous year, based on annual average rainfall. Monthly rainfall in the month before and after the end of the drought was compared to the municipality and the whole country based on the rainfall considering the disaster reduction of agricultural drought damage. Municipality and the whole country of monthly rainfall to solve agricultural drought damage were analyzed similarly. Based on date of end of drought to solve the agricultural drought damage, the monthly rainfall was analyzed by municipality 152 mm and the whole country 154 mm. Therefore, the monthly rainfall for disaster reduction of agricultural drought was set to be more than about 150 mm. In this study, we set up the reference points for disaster-prevention rainfall relevant to the occurrence of damage from agricultural droughts and disaster-reduction rainfall for droughts to end in South Korea. The present findings should be applicable to not all countries but those whose climatic impacts are comparable to South Korea's or whose drought season lasts for less than a year. Moreover, the proposed reference points for disaster prediction relevant to agricultural droughts may be conducive to central and local governments' decision making on disaster management. Conceptualization, Y.S. and M.P. ; methodology, M.P. ; validation, Y.S. and M.P. ; formal analysis: Y.S. ; resources, Y.S. ; data curation, Y.S. ; writing--original draft preparation, Y.S. ; writing--review and editing, M.P. ; visualization, Y.S. ; supervision, M.P. ; project administration, M.P. All authors have read and agreed to the published version of the manuscript. This research was funded by the Korean Ministry of Interior and Safety, grant number 2019-MOIS31-010, and the APC was funded by the Korean Ministry of Interior and Safety. This research was supported by a grant (2019-MOIS31-010) from the Fundamental Technology Development Program for Extreme Disaster Response, funded by Korean Ministry of Interior and Safety (MOIS). The authors declare no conflict of interest.