在中国洛斯高原生态系统的储水成本下降的水资源限制
Weiwei Chen1, Zhipeng Wang2, Ben Niu3
1Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an, 710075, China.
Environmental research
|January 10, 2025
概括
在中国,过度的复植.
科学领域:
- 水文和生态系统科学科学 水文和生态系统科学
- 环境可持续性 环境可持续性
- 适应气候变化 适应气候变化
背景情况:
- 表面的绿色显著影响区域的储水和生态系统功能.
- 在半干旱地区,广泛的复植会耗尽水资源,威胁到可持续性.
- 大规模绿化项目的对水资源的长期影响仍未得到充分理解.
研究的目的:
- 评估中国洛斯高原生态系统限制和水储量的变化.
- 调查重新植被,水的限制和陆地储水之间的关系.
- 评估当前绿化战略在半干旱环境中的可持续性.
主要方法:
- 利用生态系统限制指数 (ELI) 来区分水和能源限制.
- 分析了ELI和陆地水储量 (TWS),包括地下水储量 (GWS) 的变化.
- 使用空间趋势分析和融合交叉映射 (CCM) 进行因果检测.
主要成果:
- 在洛斯高原的ELI显著下降表明水资源限制减少.
- 然而,ELI在森林地区增加,而在草原和沙漠地区下降.
- 2000年后加速的绿化与TWS和GWS的大幅减少相关.
结论:
- 在Loess高原上观察到的绿化可能是以区域储水为代价的.
- 减少的水储量,特别是地下水,引发了人们对生态系统长期可持续性的担忧.
- 紧急实施节水战略对于未来的复植计划至关重要.
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