估计水预算组成部分及其干旱草原的驱动因素分析
Yunfei Chen1, Xiuhua Liu1, Ce Zheng1
1School of Water and Environment, Chang'an University, Xi'an 710054, China; Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an 710054, China; Key Laboratory of Eco-hydrology and Water Security in Arid and Semi-arid Regions of Ministry of Water resources, Chang'an University, Xi'an 710054, China.
The Science of the total environment
|October 9, 2023
概括
了解草原水预算对于干旱地区生态系统至关重要. 蒸发和透气主导了水消耗,降雨门影响了用水效率和干旱动态.
科学领域:
- 水文学的水文学
- 生态生态学 生态生态学
- 环境科学 环境科学
背景情况:
- 草原水资源预算对于干旱地区生态系统的可持续性至关重要.
- 环境因素极大地影响了水资源预算的组成部分.
研究的目的:
- 用Hydrus-1D模型模拟42年的草原水预算.
- 为了分析土壤干旱和水使用动态在干燥和潮湿的年份.
- 澄清水预算组成部分对环境因素的依赖.
主要方法:
- 草原水资源预算 (1980-2021) 的Hydrus-1D模型模拟.
- 使用标准化降水蒸发透气指数 (SPEI) 和土壤水分缺陷指数 (SMDI) 对土壤干旱的分析.
- 结构方程建模 (SEM) 用于确定因子依赖.
主要成果:
- 蒸发 (E) 和透气 (Tc) 是主要的水消费者 (96.5%在干旱年,86.1%在潮湿年).
- 降水值为380-400毫米,最大限度地提高了用水效率 (Tc/ET = 0.52) 并表明干旱/透转折点.
- 透气 (Tc) 对气象因素 (R2=0.63) 比蒸发 (E) (R2=0.27) 更敏感.
结论:
- 草原水资源预算的组成部分高度依赖于气象因素.
- 对于水预算门来说,SMDI比SPEI更为关键的指标.
- 这些发现增强了对不同气候条件下的沙地区草原水文学的理解.
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