ANNUAL CONGRESS 2025

Research on Ecological Space Management and Control of Mountain City Based on Ecological Sensitivity Evaluation -- Take Fuling, China, As An Example

Not scheduled

20m

Yildiz Technical University, Istanbul

Poster Track 05 | ENVIRONMENT AND CLIMATE

Speaker

Dr Xuchen ZHANG (Tongji University)

Description

Along with rapid urbanization, China's urban and rural ecological environment is facing a great threat, especially in mountainous cities where ecological problems are already prominent. The report to the 20th National Congress of the Communist Party of China approved on October 16th 2022, clearly proposes to vigorously promote the construction of ecological civilization, promote green development in urban and rural areas, and create resilient cities. How to achieve social progress and economic development in urban and rural areas while protecting the ecological space of mountainous cities and rural areas is a hot and challenging issue of urban and rural planning in the new era. As a widely applied technical method, ecological sensitivity evaluation can analyze and predict the possibility of regional ecosystem imbalance and environmental problems; at the same time, as an essential content and link of ecological and environmental impact analysis and urban ecosystem construction regulation, it can provide an effective basis for scientific control of urban and rural ecological space.

Fuling, which has unique mountainous features and good ecological resources, was selected as the main study subject. Fuling is located in southwestern China, and its topography is dominated by hills and terraces (54.4%), followed by low mountains (31.1%) and mesas (13.3%), with flat dam topography being extremely rare. At the same time, it has good ecological conditions and high ecological conservation value, with two rivers (Yangtze and Changjiang) running through it, numerous tributaries, a forest area of 130,100 m2 and a forest cover of 45.2% (the Chinese average is 22.96%).

The data used in this study mainly include DEM data, land use data, soil data, vegetation type data, etc. And this paper selects five factors, including terrain sensitivity(S1), soil erosion sensitivity(S2), rocky desertification sensitivity(S3), ecosystem sensitivity(S4) and acid rain sensitivity(S5), to construct a comprehensive evaluation system of ecological sensitivity. Each factor is classified as insensitive, mildly sensitive, moderately sensitive, highly sensitive and extremely sensitive according to its impact on ecological sensitivity and assigned the values 1, 3, 5, 7 and 9, respectively, to quantify each factor. Then, the individual factors are weighted (AHP method) and stacked through the GIS platform to obtain a comprehensive ecological sensitivity evaluation result.
The results show that Fuling City presents an ecological sensitivity pattern of "two belts, one area and multiple points" as a whole, and the "two belts" refers to the "T" ecological sensitive belt formed by the Yangtze River and Wujiang River as the backbone, the "one area" refers to the ecologically sensitive area of the Wuling Mountains in Wuling Mountain Township and Damu Township, and the "multiple points" are the ecologically sensitive points formed by elements such as high disaster-prone areas and water conservation areas scattered in Fuling District.
Furthermore, it can be divided into four levels: ecological highly sensitive area(14%), ecological moderately sensitive area(38%), ecological low sensitive area(32%) and ecological non-sensitive area(13%). The higher the ecological sensitivity is, the more vulnerable the ecosystem is and the more it needs to be protected and controlled. Based on the results, this paper divides the urban ecological space of Fuling City into four ecological function regions, puts forward different ecological function orientations and critical points of ecological environment protection, and points out other management and control strategies.

This paper highlights the differences between plain cities from the selected case, evaluation factors, and control strategies, aiming to provide a reference for other mountain cities' ecological space management and control.

References

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