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(一)2020年全国水资源需求量预测1.按分类用水定额法预测。受水资源条件的约束 ,未来20年用水效率需要大幅度提高 ,城乡生活用水和生态环境用水量将有所增加。估计全国万元农业增加值用水量由2000年的2665m3下降到2020年的1100m3(2001—2020年万元农业增加值用水量年均下降4.3%
(A) 2020 national water demand forecast 1. According to the classification of water quota forecast. Constrained by the conditions of water resources, the water efficiency needs to be substantially increased in the next 20 years, and water consumption for urban and rural living and ecological environment will increase. It is estimated that the water consumption per 10,000 yuan of agricultural added value in China will drop from 2,665 m3 in 2000 to 1,100 m3 in 2020 (the average annual water consumption of 10,000 yuan of agricultural added value dropped by 4.3%