DEVELOPMENT OF AGRICULTURAL DROUGHT EVALUATION SYSTEM IN KOREA

摘要

There are two ways to mitigate drought, structural and nonstructural measures. Structuralrnmeasures include storage of irrigation water and development of emergency wells, nonstructuralrnmeasures involve water saving management by early warning system.rnTo predict and evaluate drought for agriculture, we need to develop drought indices. Presently,rndrought preparedness are be classified by precipitation, reservoir storage, soil moisture in paddyrnand upland, and the growing status of crops. However, the indices lack clear quantitative criteriarnfor consistent judgment. Consequently, improvements are needed in selection and utilization ofrnproper drought indices to warn of oncoming drought.rnThe objectives of this study were to develop an Agricultural Drought Evaluation System, and tornevaluate indices for current agricultural status using the system.rnWe considered several existing drought indices for application to Korea: Reservoir Storage Indexrn(RSI), Standardized Precipitation Index (SPI), Mean Rainfall Index (MRI), Dry Day Index (DDI),rnPalmer Drought Severity Index (PDSI), Crop Moisture Index (CMI), Percent of Normal, Deciles,rnand Percent of Median. We determined that four indices are applicable to Korea RSI, SPI, MRIrnand DDI.rnThe Agricultural Drought Evaluation System was developed using these four indices to analyzerntemporal drought status.