[1]L Tiangui,Qiu Rong,Zhao Qiao,et al.Temporal-Spatial Evaluation of Regional Ecological Security and Obstacle Diagnosis of the Urban Agglomerations in the Middle Reaches of the Yangtze River Based on DPSIRM Model[J].Research of Soil and Water Conservation,2024,31(02):379-388.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 02
Page number:
379-388
Column:
Public date:
2024-03-20
- Title:
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Temporal-Spatial Evaluation of Regional Ecological Security and Obstacle Diagnosis of the Urban Agglomerations in the Middle Reaches of the Yangtze River Based on DPSIRM Model
- Author(s):
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Lü Tiangui1, Qiu Rong1, Zhao Qiao1, Li Rui1, Chen Anying1, Xiao Jia2
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(1.School of Public Finance and Public Administration, Jiangxi University of Finance and Economics, Nanchang 330013, China; 2.Jiangxi Provincial Science and Technology Affairs Center, Nanchang 330046, China)
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- Keywords:
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ecological security; spatiotemporal evolution; obstacle model; DPSIRM model; urban agglomerations in the middle reaches of the Yangtze River
- CLC:
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X826
- DOI:
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- Abstract:
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[Objective] The aims of this study are to objectively identify the spatial and temporal evolutionary characteristics of ecological security in the middle reaches of Yangtze River urban agglomeration, to evaluate its ecological security level and diagnose its influencing factors, and to provide a reference for the construction of the regional ecological security pattern. [Methods] The 31 municipal administrative units in the middle reaches of Yangtze River urban agglomeration were used as research samples, and an ecological security evaluation index system was constructed based on the DPSIRM model. The spatial and temporal evolution characteristics of ecological safety in the study area were evaluated using exploratory spatial data analysis, and the factors impeding ecological safety were analyzed in conjunction with the barrier degree model. Finally, based on the evaluation and diagnosis results, the optimization path was proposed. [Results](1)The ecological safety level of cities in the study area had generally been improving from 2006 to 2020, and the ecological safety level varied spatially, but the overall difference was not large.(2)The results of the ranking of the ecological safety barrier degree of the study area were management factors>influence factors>pressure factors>response factors>driving factors>state factors. The improvement of its ecological safety level was mainly governed by six specific indicators, namely, the proportion of investment in fixed assets, the amount of water resources per capita, education expenditure within the general budget of local finance, the area of green areas and squares, the area of soil erosion control, and GDP per capita.(3)There was a certain positive spatial autocorrelation in the ecological safety level of the study area, with the formation of a high-value agglomeration area in central Jiangxi Province and a low-value agglomeration area in central Hubei Province.(4)It suggested that the most cities in the urban agglomeration in the middle reaches of the Yangtze River were at the critical safety level(Ⅲ), and there was still a large gap from reaching the overall safety level(Ⅴ). [Conclusion] The ecological security level of the city cluster in the middle reaches of the Yangtze River showed an overall positive trend, and more attention should be paid to the response of economic countermeasures, the utilization of ecological resources as well as the construction and management of ecological systems, so as to help build an ecological security barrier for the city cluster in the middle reaches of the Yangtze River.