Urban “blue-green” space is the basic element of urban natural ecological space. The rapid urbanization process has a significant impact on the pattern of urban blue-green space and seriously threatens the urban ecological environment. It is of great significance for urban ecological protection and sustainable development to study the change in characteristics of blue and green space during urban expansion. In this paper, a comprehensive method of remote sensing image, landscape pattern analysis, sector analysis, and coupling analysis is applied to analyze the spatio-temporal evolution characteristics and coordinated development level of the blue-green space and built-up area in central Wuhan from 1987 to 2018. The results showed that the land use and landscape pattern in the central city of Wuhan underwent a drastic change process, and the dominant change was the occupation of blue-green space by urban built-up areas, which led to the increase of landscape fragmentation and the decrease of heterogeneity. Urban green space is gradually marginalized and concentrated in local areas. The blue space has an obvious blocking effect on the expansion of the built-up area, and its spatial pattern tends to be stable gradually. In addition, the coupling degree between urban blue-green space and urban built area presents an inverted U-shape, and the coordinated development level among the three has entered a stage of moderate imbalance. It is urgent to strengthen the protection of blue-green space, curb the disorderly expansion of cities, and improve the quality of urban development.

中文翻译：

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基于耦合模型的城市蓝绿空间与建成区交互作用分析——以武汉中心城区为例

城市“蓝绿”空间是城市自然生态空间的基本要素。快速的城市化进程对城市蓝绿空间格局产生重大影响，严重威胁城市生态环境。研究城市扩张过程中蓝绿空间特征的变化对城市生态保护和可持续发展具有重要意义。本文应用遥感影像、景观格局分析、扇区分析、耦合分析等综合方法，对武汉市中心蓝绿空间与建成区的时空演化特征及协调发展水平进行分析。 1987—2018年，结果表明武汉中心城区土地利用和景观格局发生了剧烈变化，主要变化是城市建成区对蓝绿空间的占用，导致景观破碎化加剧，异质性降低。城市绿地逐渐边缘化，集中在局部地区。蓝色空间对建成区扩张具有明显的阻滞作用，其空间格局逐渐趋于稳定。此外，城市蓝绿空间与城市建成区的耦合度呈现倒U型，三者协调发展水平进入适度失衡阶段。迫切需要加强蓝绿空间保护，遏制城市无序扩张，提高城市发展质量。导致景观破碎化加剧，异质性降低。城市绿地逐渐边缘化，集中在局部地区。蓝色空间对建成区扩张具有明显的阻滞作用，其空间格局逐渐趋于稳定。此外，城市蓝绿空间与城市建成区的耦合度呈现倒U型，三者协调发展水平进入适度失衡阶段。迫切需要加强蓝绿空间保护，遏制城市无序扩张，提高城市发展质量。导致景观破碎化加剧，异质性降低。城市绿地逐渐边缘化，集中在局部地区。蓝色空间对建成区扩张具有明显的阻滞作用，其空间格局逐渐趋于稳定。此外，城市蓝绿空间与城市建成区的耦合度呈现倒U型，三者协调发展水平进入适度失衡阶段。迫切需要加强蓝绿空间保护，遏制城市无序扩张，提高城市发展质量。蓝色空间对建成区扩张具有明显的阻滞作用，其空间格局逐渐趋于稳定。此外，城市蓝绿空间与城市建成区的耦合度呈现倒U型，三者协调发展水平进入适度失衡阶段。迫切需要加强蓝绿空间保护，遏制城市无序扩张，提高城市发展质量。蓝色空间对建成区扩张具有明显的阻滞作用，其空间格局逐渐趋于稳定。此外，城市蓝绿空间与城市建成区的耦合度呈现倒U型，三者协调发展水平进入适度失衡阶段。迫切需要加强蓝绿空间保护，遏制城市无序扩张，提高城市发展质量。