School of Architecture and Art, Central South University, Changsha 410083, China.
Int J Environ Res Public Health. 2023 Mar 14;20(6):5095. doi: 10.3390/ijerph20065095.
The Chengdu-Chongqing city group (CCCG) is one of the regions with acute human-land conflicts in China at present. The current rapid development of CCCG has caused a large negative impact on regional land ecosystem services. Land ecosystem is the basis of economic development. Reasonable economic development is also the inherent requirement of land ecosystem and an important support for land ecosystem protection. Promoting the coordinated development of the economy and land ecosystems is a prerequisite for this city group to achieve ecological protection and high-quality development. Taking CCCG as an example, this paper constructs a coupling evaluation model of economic-social development and land ecosystem service by using the entropy weight method, coupling coordination degree model, gravity center model, and standard deviation ellipse model, and explores the coupling coordination degree and spatial-temporal evolution rule of the above two systems. The study found that, from 2005 to 2020, the overall economic-social development of the CCCG showed an upward trend with a regular pattern of a 'High in the east and west, low in the central', and the 'dual-core' spatial structure with Chengdu and Chongqing as the core ; the overall performance of land ecosystem services had a gentle slope downward trend with a 'U'-shaped spatial pattern of "high around and low in the middle". The results also show that the coupling coordination degree of economic-social development and land ecosystem services in CCCG continues to rise steadily. Overall, the level of coupling coordination is low, and the type of coupling coordination has gradually evolved from severe and moderate imbalance to moderate coordination and mild imbalance. Therefore, the CCCG should make full use of the advantages of the "dual-core" cities to improve the level of peripheral economic linkage, increase investment in science and technology to enhance the endogenous power of economic development, establish cooperation mechanisms to narrow the urban gap, and integrate ecological resources to promote ecological industrialization to better realize the synergistic promotion of land ecological protection and high-quality economic development.
成渝城市群是当前中国区域人地矛盾较为尖锐的地区之一。当前成渝城市群的快速发展对区域土地生态系统服务造成了较大的负面影响。土地生态系统是经济发展的基础，合理的经济发展也是土地生态系统的内在要求，是土地生态系统保护的重要支撑。推动经济与土地生态系统协调发展，是该城市群实现生态保护与高质量发展的前提。以成渝城市群为例，运用熵权法、耦合协调度模型、重心模型和标准差椭圆模型，构建经济社会发展与土地生态系统服务的耦合评价模型，探讨了两系统的耦合协调度及其时空演变规律。研究发现：2005—2020 年，成渝城市群经济社会发展整体呈上升趋势，格局为“东西高、中间低”，“双核”空间结构以成都、重庆为核心；土地生态系统服务整体呈平缓下降趋势，空间格局为“四周高、中间低”的“U”型。结果还表明，成渝城市群经济社会发展与土地生态系统服务的耦合协调度持续稳步上升，整体耦合协调水平较低，耦合协调类型逐渐由严重失调和中度失调演化为中度协调和轻度失调。因此，成渝城市群应充分发挥“双核”城市的优势，提升外围经济关联水平，加大科技投入以增强经济发展的内生动力，建立合作机制缩小城市差距，整合生态资源促进生态产业化，从而更好地实现土地生态保护与高质量经济发展的协同推进。
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