网络结构和河流连接的稳定性在一个快速城市化的地区
Zhihui Yu1, Miao Lu2, Youpeng Xu1
1School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China.
The Science of the total environment
|June 23, 2023
概括
城市化严重损害了河流网络的连接,影响了生态系统的功能. 保护关键的河道节点对于保持快速发展地区的网络稳定性至关重要.
科学领域:
- 环境科学 环境科学
- 水文学的水文学
- 城市生态城市生态学
背景情况:
- 河流连接对于河流网络的功能至关重要,但在城市化地区恶化.
- 之前的研究发现,由于城市化,河流网络结构和连接性发生了变化.
- 在了解河流连接的网络结构和城市化的具体影响方面存在差距.
研究的目的:
- 用复杂网络理论分析河流网络结构和连接性.
- 在节点破坏下评估河流连接的稳定性.
- 研究河流网络对太湖平原城市化的空间反应.
主要方法:
- 应用复杂网络理论来分析河流网络结构和连接性.
- 检查了节点程度,枢纽和连接度量.
- 模拟节点移除以评估网络稳定性和确定关键值.
主要成果:
- 太湖平原的河流网络呈现中度节点程度,但枢纽和连接性较低.
- 成天茂 (YCDM) 地区的河流网络枢纽和连接性比成西 (WCXY) 和杭家胡 (HJH) 地区更好.
- 随着节点的破坏,网络稳定性显著下降;关键值因地区而异 (例如,太湖平原5% ,HJH7%).
- 城市化对网络特征产生了负面影响,主要是节点程度 (45%),其次是枢纽 (21%) 和连接性 (18%).
结论:
- 河流网络连接易受城市化影响,对结构和稳定性产生重大影响.
- 针对性地保护重要的河道节点对于保持网络完整至关重要.
- 这些发现为城市化地区的河流网络识别,保护和恢复提供了理论支持.
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