Global agricultural green and blue water consumptive uses in the context of water scarcity and climate change

Agriculture, including rainfed and irrigated systems, is the single largest water user amongst all the economic sectors.There is an intrinsic linkage between water availability, food production and food security.This study takes a green and blue water perspective to model the water-food relations at the global level and on a high spatial resolution with a focus on Sub-Saharan Africa (SSA).The major issues investigated include: 1) green and blue water consumptive uses in crop production, particularly staple food crops at the global level; 2) possible impact of soil nutrient improvement and climate change on crop water uses and water productivity in SSA.