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[1]HU Mengshan,YE Zhangsheng,GU Moli.Assessment on Landscape Ecological Risk in Nanchang City Based on Impervious Surface Expansion[J].Research of Soil and Water Conservation,2023,30(03):448-459.[doi:10.13869/j.cnki.rswc.2023.03.024]

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Assessment on Landscape Ecological Risk in Nanchang City Based on Impervious Surface Expansion

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 03 Page number: 448-459 Column: Public date: 2023-04-10

Title:: Assessment on Landscape Ecological Risk in Nanchang City Based on Impervious Surface Expansion

Author(s):: HU Mengshan, YE Zhangsheng, GU Moli; (College of Earth Sciences, East China University of Technology, Nanchang 330013, China)

Keywords:: landscape ecological risk; impervious surface; influencing factors; geographic detector; Nanchang City

CLC:: X171.1

DOI:: 10.13869/j.cnki.rswc.2023.03.024

Abstract:: [Objective]Landscape ecological risk is an effective indicator to identify regional ecological risks and measure regional ecological security. Based on the construction of impervious surface, the environmental response of human activities to the formation and exacerbation of risks can be intuitively determined. Regional landscape ecological risk assessment and the influencing factors of the aggravated risk areas are analyzed, which has scientific significance and practical value for curbing the emerging and spreading of risk exacerbation zones. [Methods] Nanchang City was taken as an example, the information of impervious surface was obtained to construct a landscape ecological risk index. The spatiotemporal evolution characteristics of landscape ecological risk were analyzed. The influencing factors of landscape ecological risk in the study area was measured by using geographic detectors. [Results](1)From 2010 to 2020, the area of impervious surface in Nanchang City increased dramatically, from 648.63 km² to 1 075.12 km², and the resources of agricultural land and ecological land continued to decline. The impervious surface was mainly converted from landscapes such as cultivated land, forest land, and water areas, and the degree of interference from human activities increased.(2)From 2010 to 2020, the spatial distribution of Nanchang's landscape ecological risk index was presented as low in the middle and high on both sides. The average value of landscape pattern index decreased as a whole. In 2010, 2015, and 2020, the areas of high-risk areas of landscape ecology in Nanchang City were 519.73 km², 324.82 km², and 365.04 km², respectively. The area of landscape ecological high-risk areas first decreased and then increased. The areas were dominated by landscape ecological medium-high-risk areas and medium-risk areas.(3)The influencing factors of landscape ecological risk in Nanchang City in 2010, 2015 and 2020 were dominated by socio-economic factors and distance factors. The interaction effects of the influencing factors were all larger than the explanation degree of a single factor. The distance factor had a positive effect on natural climate factors and socioeconomic factors.(4)The landscape ecological risk exacerbation zone in Nanchang City was dominated by landscape types such as forest land, water area and cultivated land. Exacerbation zones were caused by multiple factors such as natural environment, socio-economics, and accessibility, but the impact of human activities was more prominent. [Conclusion] The landscape ecological status of Nanchang City has been improving. The impacts of natural environment, social economy, distance and other factors on the landscape ecological risk index and risk exacerbation areas are different and interactive. These research results are of great significance for maintaining regional ecological security and sustainable development.

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Last Update: 2023-04-10