成渝双城经济圈“六江”生态廊道网络脆弱性诊断与靶向治理策略

Vulnerability Diagnosis and Targeted Governance Strategies for the “Six Rivers” Ecological Network in the Chengdu-Chongqing Economic Circle

中文关键词:  生态网络  生态韧性  拓扑结构  空间异质性  靶向治理

英文关键词:ecological network  ecological resilience  topological structure  spatial heterogeneity  targeted governance

中文摘要:

      成渝双城经济圈“六江”生态廊道是长江上游生态安全的战略屏障，其网络韧性对维系区域可持续发展至关重要。本研究聚焦“六江”生态廊道网络，构建“生态格局—网络结构—韧性评估”分析框架，整合多源空间数据，运用GIS空间分析与复杂网络理论，系统评估网络的源汇格局、拓扑结构与动态韧性。结果表明：①生态安全格局呈现显著空间异质性，水资源安全、石漠化风险等地带性特征明显，中部城镇密集区是人类活动干扰的核心地带。②网络拓扑结构呈现“双核驱动、层级分异”的小世界特征，少数核心枢纽节点（ k-core≥10）主导跨区域生态流，而大量边缘节点构成局部脆弱区域。③网络韧性对关键节点高度敏感，移除核心节点将导致网络连通鲁棒性（ RC）与网络传输效率（ EV）骤降，而网络的冗余结构虽能延缓全局崩溃，却以牺牲生态流路径效率为代价。④关键节点功能影响显著，其失效将直接削弱区域水源涵养能力与农业灌溉效率。最后，基于网络脆弱性诊断，从核心节点保护、冗余通道构建、断裂廊道修复及智能风险监控四个方面提出“靶向治理”优化路径，为完善成渝地区生态环境分区管控制度、筑牢长江上游生态屏障提供科学支撑。

英文摘要:

      The “Six Rivers”ecological corridor within the Chengdu-Chongqing economic circle serves as a strategic barrier for the ecological security of the upper Yangtze River, and its network resilience is crucial for maintaining regional sustainable development. This study focuses on the “Six Rivers” ecological corridor network, constructing an analytical framework of “ecological pattern—network structure—resilience assessment”. By integrating multi-source spatial data and applying GIS spatial analysis with complex network theory, this research systematically assesses the network’s source-sink pattern, topological structure, and dynamic resilience. The results indicate that: ① The ecological security pattern exhibits significant spatial heterogeneity, with distinct zonal characteristics in water resource security and rocky desertification risk, while the central urban agglomeration acts as the core area of human activity disturbance. ② The network’s topological structure displays “dual-core-driven, hierarchical differentiation” small-world characteristics, where a few core hub nodes（k-core ≥ 10） dominate cross-regional ecological flows, while numerous edge nodes form localized vulnerable areas. ③ The network’s resilience is highly sensitive to critical nodes. Removing core nodes leads to a sharp decline in network connectivity robustness（RC） and functional transmission efficiency（EV） . Furthermore, while the network’s redundant structure can delay global collapse, it comes at the cost of sacrificing the efficiency of ecological flow paths. ④ The functional impact of key nodes is significant, and their failure directly weakens regional water conservation capacity and agricultural irrigation efficiency. Finally, based on the network vulnerability diagnosis, this study proposes “targeted governance” optimization pathways from four aspects: core node protection, redundant corridor construction, fractured corridor restoration, and intelligent risk monitoring. This provides scientific support for improving the ecological environment zoning management system in the Chengdu-Chongqing area and reinforcing the ecological security barrier of the upper Yangtze River.