농업적 물부족 대응지수를 활용한 시군단위 가뭄 대응역량 평가 = A quantitative assessment framework for regional drought response using the agricultural water deficit response index

다국어 초록 (Multilingual Abstract)

Agricultural drought poses a growing threat to crop production and regional water systems. Despite its significance, regional disparities in drought impacts, damages, and adaptive capacities remain inadequately understood. This study develops a quantitative framework—the Agricultural Water Deficit Response Index (AWDRI)—based on five standardized indicators to evaluate regional drought response capacities. Utilizing data from 167 administrative regions in South Korea, the study employs Principal Component Analysis (PCA) and K-means clustering to identify structural differences and classify regional response typologies. PCA results indicate that two principal components—representing physical and administrative dimensions—account for 56.7% of the total variance. Clustering analysis reveals three distinct regional response types: Balanced, Physical-Dominant, and Exceptional. Regions classified as Balanced generally exhibit low AWDRI scores, whereas Physical-Dominant regions experience moderate levels of drought damage despite considerable physical response capacity. These findings highlight that drought severity alone does not fully explain regional outcomes. Rather, the structural composition of drought response mechanisms plays a critical role. The AWDRI framework enables a multidimensional assessment of agricultural drought vulnerability and adaptive capacity, offering a scalable and transferable model for informing future drought policy and regional resilience planning.