Agri-Food System Water Use Database

This database provides information about the amount of water use in agriculture food systems covering all sectors from farming to food processing industries. The data are presented at the country level with sectoral disaggregation following the Nexus Social Accounting Matrix (SAM) sectoral specifications. The database also differentiates the type of water in each sector based on water sources. The green water refers to type of water originated from precipitation or rain, while the blue water refers to all water that comes from irrigation covering both surface and groundwater. Both types of water are consumed by plants or animals during the production process. The grey water on the other hand is the amount of water generated as an implication from production activities that cause the water polluted. Since it has loads of pollutants created from production activities, this type of water can be seen as a waste in the whole production system.本数据库提供农业食品系统的用水量相关数据，覆盖从农业种植到食品加工业的全部部门。数据以国家层级为统计单元，并严格遵循关联社会核算矩阵（Nexus Social Accounting Matrix, SAM）的部门分类标准进行部门细分。本数据库同时依据水源类型，对各部门的用水类别进行区分：绿水（green water）指源自自然降水的水资源；蓝水（blue water）则涵盖所有用于灌溉的水资源，包括地表水与地下水。上述两类水资源均会在生产流程中被植物或养殖生物消耗利用。而灰水（grey water）则是指因生产活动造成水体污染后所产生的污染性水量，由于其携带生产活动产生的大量污染物，此类水资源可被视为整个生产系统中的废弃物。