위성영상기반 농업가뭄 모니터링을 위한 Evaporative Stress Index (ESI)의 적용성 평가

초록

Climate change has caused changes in environmental factors that have a direct impact on agriculture such as temperature and precipitation. Themeteorological disaster that has the greatest impact on agriculture is drought, and its forecasts are closely related to agricultural production and watersupply. In the case of terrestrial data, the accuracy of the spatial map obtained by interpolating the each point data is lowered because it is based onthe point observation. Therefore, acquisition of various meteorological data through satellite imagery can complement this terrestrial based droughtmonitoring. In this study, Evaporative Stress Index (ESI) was used as satellite data for drought determination. The ESI was developed by NASA andUSDA, and is calculated through thermal observations of GOES satellites, MODIS, Landsat 5, 7 and 8. We will identify the difference between ESIand other satellite-based drought assessment indices (Vegetation Health Index, VHI, Leaf Area Index, LAI, Enhanced Vegetation Index, EVI), and useit to analyze the drought in South Korea, and examines the applicability of ESI as a new indicator of agricultural drought monitoring.

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