中国的饮食变化将增加农业蓝色和绿色的水足迹
Licheng Liu1, Xintao Hu1, Yijuan Zhan1
1College of Land Science and Technology, China Agricultural University, Beijing 100083, China.
The Science of the total environment
|August 1, 2023
概括
饮食转变显著影响中国农业的水足迹,增加消费. 人口变化影响很小,强调需要管理水资源,考虑到不断变化的饮食.
科学领域:
- 环境科学 环境科学
- 农业经济学 农业经济学
- 水资源管理 水资源管理
背景情况:
- 农业是中国淡水的主要消费者,占总消费量的61%.
- 了解水足迹变化的驱动因素,特别是人口和饮食影响,对于可持续的资源管理至关重要.
研究的目的:
- 根据各种情景,估计中国农业蓝色和绿色水足迹的变化.
- 分析人口动态和饮食结构对农业部门用水量的影响.
主要方法:
- 应用环境扩展的多区域输出输出模型.
- 估计了中国31个省份20个农业部门的水足迹变化.
- 场景分析包括人口和饮食结构的变化.
主要成果:
- 水足迹网络展示了重要的省际贸易,发达省份主导进出口流.
- 人口变化对水足迹的影响很小,而饮食结构的变化是主要的驱动因素.
- 饮食转变使蓝水足迹增加33%,绿水足迹增加12%,改变了从谷物到水果和蔬菜的关键贡献部门.
结论:
- 饮食结构的变化对中国的农业用水量有很大影响,需要有针对性的管理策略.
- 优化饮食模式需要仔细考虑水资源压力和高效管理.
- 发达省份在国家水足迹网络中发挥着主导作用,突出显示了水资源影响的区域差异.
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