估计中国灌作物的人工灌蒸发转化率
Han Gao1,2, Jiahong Liu3, Hao Wang1,2
1College of New Energy and Environment, Jilin University, Changchun, 130021, China.
Scientific reports
|July 12, 2024
概括
人工灌蒸发是农业水循环的关键组成部分,占中国农作物蒸发总量的41.3%. 本研究量化了这一重要的用水量,对于有效的农业水资源管理至关重要.
科学领域:
- 水文学的水文学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 农业占全球取水量的70%.
- 蒸发转化是农业水循环中的一个关键过程.
- 灌作物利用降水和灌水.
研究的目的:
- 在中国为灌作物引入和量化人工灌蒸发转化 (AIIET).
- 评估AIIET在耕地双重水循环中的作用.
- 为改善农业用水管理提供数据.
主要方法:
- 开发了一种新的定量模型系统,集成传统的蒸发透气和土壤水平衡模型.
- 从2013年到2017年,中国17种作物类别的年度AIIET计算.
- 分析了AIIET在不同农业用水管理地区的分布.
主要成果:
- AIIET占作物蒸发总量的41.3%,总量为228.1公里3年-1.1.
- 区域AIIET:90.0公里3年−1 (东北),86.0公里3年−1 (东南),和52.2公里3年−1 (西).
- 证明了灌对耕地水循环的重大影响.
结论:
- 人工灌蒸发是农业用水的一个实质性和可量化的方面.
- 研究结果为水资源管理和灌农业区政策制定提供了关键的见解.
- 强调人类活动对耕地水文学的影响.
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