水资源. 在水资源. 水文连接性限制了全球陆地水流的分区
Stephen P Good1, David Noone2, Gabriel Bowen3
1Department of Geology and Geophysics, University of Utah, Salt Lake City, UT, USA. Department of Biological and Ecological Engineering, Oregon State University, Corvallis, OR, USA.
概括
蒸发透气分区揭示了透气占主导地位,使水返回大气层. 大多数蒸发源于土壤,与地表水的连接有限,影响流域水文.
科学领域:
- 水文学的水文学
- 生态生态学 生态生态学
- 大气科学 大气科学
背景情况:
- 大陆降水通过蒸发转化返回大气层.
- 量化蒸发转化子组件对于了解水循环和生态过程至关重要.
- 传统的水文方法难以准确地划分蒸发透气流.
研究的目的:
- 使用联合大规模流量分区方法量化蒸发转化子组件.
- 评估土壤水和地表水之间的水文连接.
- 了解对流域水动态的影响.
主要方法:
- 结合了两个大规模的流量分区方法.
- 量化蒸发透气 (ET) 和其子组件:透气,土壤蒸发和地表水蒸发.
- 评估了植物接入的土壤水对地表水的贡献.
主要成果:
- 在全球范围内,透气占蒸发透气的64%.
- 65%的蒸发来源于土壤,而不是地表水.
- 据估计,38%的地表水来自植物接入的土壤水.
结论:
- 土壤和地表水之间的有限连接从根本上构建了流域中的水路运输.
- 这一发现对物理和生物地球化学过程有重大影响.
- 精确划分蒸发转化是推动水文和生态理解的关键.
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