Journal of Geo-information Science ›› 2023, Vol. 25 ›› Issue (10): 1968-1985.doi: 10.12082/dqxxkx.2023.230178

Previous Articles     Next Articles

Modelling Gradient Changes of Non-linear Dynamic Coupling Relationships between Urban Expansion and Ecological Land

MA Lisha1(), LIU Dianfeng1,2,3,*(), LIU Yaolin1,2,3   

  1. 1. School of Resource and Environmental Sciences, Wuhan University, Wuhan 430079, China
    2. Key Laboratory of Digital Cartography and Land Information Application Engineering, Ministry of Natural Resources, Wuhan University, Wuhan 430079, China
    3. Luojia Laboratory, Wuhan University, Wuhan 430079, China
  • Received:2023-04-05 Revised:2023-06-28 Online:2023-10-25 Published:2023-09-22
  • Contact: * LIU Dianfeng, E-mail:;
  • Supported by:
    National Natural Science Foundation of China(42171414);Fundamental Research Funds for the Central Universities(2042023kfyq04)


Exploring the coupling between urban development and ecological protection plays a key role in promoting the new urbanization strategy. The existing studies have largely focused on the coupling of urban system elements, structures, and functions, and the ecological environment at the macro scale, while their nonlinear dynamic relationships have been rarely explored across the spatial gradient. Here, we established a multi-criteria indicator system to quantify the urban-ecological composite system and proposed an integrated analytical framework to assess the dynamic coupling of this composite system. Taking Wuhan city as an example, we investigated the dynamic coupling between the urban expansion processes and the ecological space changes at different spatial domains (i.e., the area within the third-ring road, the area around the high-speed ring road, and the urban center) during the period of 1985-2020. The results show that the area of construction land experienced a continuous growth from 1985 to 2020 with an increasing rate from the urban center to rural areas, while the area of ecological land decreased rapidly. The urban center had a more significant decline in ecological land than other areas. With the rapid urban expansion, the coupling of the urban expansion process and ecological degradation presented a S-shaped change in the urban center area and the area around the high-speed ring road in Wuhan city, which was less obvious before 2010 and afterwards became significant. In the area of the high-speed ring road, the coupling level showed an overall increase with fluctuations, e.g., it fluctuated between the phase of highspeed development and the phase of spiral rise after 2005. For the area between the high-speed ring road and the urban center, the coupling level exhibited an approximate S shape, with a transition from a slow coordination state to the spiral-up state before 2010 and then a decline to the high-speed development state. In the urban center area, the coupling level was already at the stage of the high-speed development during the period of 2000-2005, and then fluctuated around high values. There were significant differences in the changes of coupling of urban-ecological system across spatial gradients of a city, which indicated that future urban space management and green infrastructure planning should be adapted to local conditions.

Key words: urban expansion, ecological space evolution, urban ecological systems, dynamic coupling relationship, nonlinear analysis, spatial gradient, urban space controlling, Wuhan city