STUDY ON THE ESTIMATION OF CROP PRODUCTION AND REQUIRED IRRIGATION WATER BASED ON LONG-TERM DROUGHT SIMULATION BY USING THE COUPLED LAND AND VEGETATION DATA ASSIMILATION

Abstract

 After 2000, the northeastern Brazil has been suffering by serious droughts. Particularly, the reservoirs reduced to only 6 % of the total water storage in Ceará State caused by the severe drought in several years after 2012. In this study, the long-term agricultural drought (2003-2017) was simulated by the coupled land and vegetation data assimilation system (CLVDAS) over the northeastern Brazil. Simultaneously, we could recognize that the annual crop production and the irrigation water volume, which is necessary to obtain a target yield, are estimated by using LAI’s deviation from CLVDAS.