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[1]WANG Jieyun,LUO Zhijun,QI Song.Coupling Relationship Between Urban Spatial Expansion and Landscape Ecological Risk[J].Research of Soil and Water Conservation,2021,28(05):142-151.

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Coupling Relationship Between Urban Spatial Expansion and Landscape Ecological Risk

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 05 Page number: 142-151 Column: Public date: 2021-08-20

Title:: Coupling Relationship Between Urban Spatial Expansion and Landscape Ecological Risk

Author(s):: WANG Jieyun^1,2,LUO Zhijun^1,2,QI Song^1,2; (1.College of Land Resources and Environment,Jiangxi Agricultural University,Nanchang 330045,China; 2.Jiangxi Provincial Key Laboratory of Poyang Lake Basin Agricultural Resources and Ecology,Nanchang 330045,China)

Keywords:: urban expansion; landscape ecological risk; geostatistical analysis; GWR; Yuanzhou District

CLC:: P901

DOI:: -

Abstract:: Based on the intensity coefficient of urban expansion,landscape ecological risk index,geostatistical analysis and GWR Model,the spatial and temporal dynamic characteristics of urban expansion and landscape ecological risk in Yuanzhou District from 2000 to 2018 were analyzed,and the coupling relationship between urban expansion and ecological risk in Yuanzhou district was revealed. The results are as follows.(1)From 2000 to 2018,the urban land area of Yuanzhou District increased by 2.65 times,and the expansion intensity coefficient was 0.14%; the space presented as the inverted T-shaped development pattern in the east and west along Shanghai Kunming Expressway and Yuanhe River,and northward along Wanyi highway. At the same time,Cihua,Wentang and Xinfang were also expanding obviously;(2)As the most dominant landscape type in Yuanzhou District,woodland was gradually losing its advantages. The areas of cultivated land and construction land were increasing significantly. In addition,the losses of unused land and water landscape was very high.(3)The range of medium and above ecological risk areas significantly reduced,and the scope of low ecological risk areas significantly increased. The central urban area completed the transformation from high ecological risk to low ecological risk.(4)Urban land use and landscape ecological risk were positively correlated,and the regression coefficient of central urban area was lower than that of other areas in the same period. There were positive and negative regression coefficients between urban expansion intensity coefficient and landscape ecological risk change rate,and there was a positive correlation between urban expansion intensity coefficient and landscape ecological risk change rate. This research conclusion can provide reference for the coordinated optimization of urban development and ecological protection.

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Last Update: 2021-08-20