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城市化影响中国七个典型城市聚集区的蒸发转化变化
Wanqiu Xing1, Zhiyu Feng2, Xin Cao3
1The National Key Laboratory of Water Disaster Prevention, Hohai University, Nanjing 210098, China; College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China; Joint International Research Laboratory of Global Change and Water Cycle, Hohai University, Nanjing 210098, China.
The Science of the total environment
|August 10, 2024
概括
城市化显著改变了城市和非城市地区之间的蒸发转化 (ET) 差异. 这项研究量化了中国各地的这些变化,揭示了气候变化.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 城市规划 城市规划
背景情况:
- 城市和非城市区域 (∆ET) 之间的蒸发透气 (ET) 差异对于城市规划和水资源管理至关重要.
- 了解城市化在中国不同气候条件下如何影响∆ET至关重要,但尚未确立.
研究的目的:
- 为了估计由于中国各地城市化而发生的 ∆ET 变化的大小.
- 确定影响主要城市聚集区 (UA) ∆ET变化的主要驱动因素.
- 分析不同回归周期下的极端∆ET事件的非静止特征.
主要方法:
- 利用远程探测ET数据以1公里分辨率用于中国7个国家级UA (2003-2020年).
- 估计的∆ET大小和量化驱动因素,包括气候和社会经济变量 (GDP,NDVI).
- 使用回归周期分析分析了极端∆ET的非静止特性.
主要成果:
- 所有UA都显示城市ET (ETurban) 比周围的非城市ET (ETnon-urban) 低.
- 南华UA通常表现出比北华UA更高的绝对∆ET值.
- 城市化增加了广州平原,中央平原和GHKMGBA的∆ET;气候变化减少了成都-重庆和YRDUA的∆ET.
- 极端的∆ET事件因城市化在回归期 (5,20,50年) 中加剧.
结论:
- 城市化是增加∆ET的重要驱动因素,影响城市水循环.
- 气候变化也起着至关重要的作用,区域差异很大.
- 为了有效管理,需要进一步分解影响城市水循环的因素.
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