气候变化领域集成服务门户

Virtual water (VW) is increasingly used to understand water consumption related to goods and services in a country. This study estimated the virtual water flow (VWF) for the import and export of agricultural crops in Saudi Arabia. In 2012, Saudi Arabia imported 16.5 million ton (MT) of 58 different crop items from more than 70 countries, while the country exported 0.80 MT of 55 different crop items. The overall import and export were 1.6 and 0.08 kg per person per day, respectively. In 2012, the country imported approximately 22,922 million m(3) (Mm(3)) of VW in the form of crop and crop products, in which the major contributors were barley (44.5%), rice (15.1%) and wheat (13.7%). The country exported 970 Mm3 of VW, associated mainly with dates (30.3%), potatoes (13.6%), sunflower seed (8.6%) and corn (8.2%). The net VWF into the country was 21,952 Mm(3), which was equivalent to 776 m(3) per person per year. The export of VW was 4.2% of VW import. Through better management of imported animal feed and adjusting the import from source countries, import of subsidized crop and VWF into Saudi Arabia can be reduced, which can lower the expenditure and protect the global water resources.