MODIS 인공위성영상을 이용한 수분이용효율 산정 및 검증

Abstract

Water Use Efficiency (WUE) is a hydrological new index that how amount of evapotranspiration (ET) is used for vegetative productivity. The WUE is defined as the ratio of Gross Primary Productivity (GPP) and ET per unit area. Recently, the WUE has been applied for hydrologic analysis on ecosystem productivity and energy balance in global scale while the previous studies focused on the applied researches in crop science, agricultural and forestry science. In this study, we extracted GPP and estimated ET using Moderate Resolution Imaging Spectroradiometer (MODIS) image data to compute spatio-temporal distribution of the WUE in Korea. This study will contribute to understand the role vegetative activity on hydrologic cycle in the ecosystem.