Studying the optimization of urban water ecological network from the perspective of resilience and improving the resilience of water ecological space are the important ways to improve the overall resilience level of cities. Firstly, the article combines the objectives of resilient city with water ecological network, and proposes to construct the water ecological space of resilient urban from three dimensions: structural resilience, functional resilience, and regulatory management resilience. Secondly, taking Changsha City as a typical case and applying MSPA model and MCR model, this article identifies and constructs the water ecological network based on the "source-corridor-node". From the perspective of integration of complex network and graph theory, the evaluation index of network resilience is constructed from the structure and function dimensions, and indicators effectively reflecting the structural resilience and functional resilience of the water ecological network are selected to evaluate the resilience of water ecological space in Changsha. The results show that: The overall connectivity of the water ecological network is at good status, a foundation of resilience is preferable, and the landscape fragmentation is manageable, but the long-term urban construction and development damage the connectivity of the water system within the city, and lead to the low-level diversity and single function of the water network. Redundant design of the network is insufficiency, dynamic adaptability of regulation and management is weak. The study further proposes the optimization strategy of the water ecological network in Changsha based on resilience enhancement: speeding up the restoration of natural water corridors and dredging the connection of existing artificial ditches, attaching importance to the implementation of "point-axis development" and multi-functional composite utilization models of ecological nodes and corridors, enhancing the redundancy and modular design of urban water network structure and function, improving the resilience of the regulation and management and forming a dynamic regulation mechanism for multi-channel disaster response.
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