[1]Wang Bin,Mei Zhixiong,Wei Junchao,et al.Spatiotemporal Characteristics of Land-Use Ecological Risk in the Pearl River Delta Region Based on Spatial Statistics[J].Research of Soil and Water Conservation,2023,30(06):423-431,440.[doi:10.13869/j.cnki.rswc.2023.06.029]
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Spatiotemporal Characteristics of Land-Use Ecological Risk in the Pearl River Delta Region Based on Spatial Statistics
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
423-431,440
Column:
Public date:
2023-10-10
- Title:
- Spatiotemporal Characteristics of Land-Use Ecological Risk in the Pearl River Delta Region Based on Spatial Statistics
- CLC:
- X826
- DOI:
- 10.13869/j.cnki.rswc.2023.06.029
- Abstract:
- [Objective] The aim of this study is to explore the spatial structure pattern and spatial-temporal change rule of land use ecological risk in the Pearl River Delta(PRD)region, and then to provide scientific support for the sustainable utilization of land resources and ecological security. [Methods] A land-use ecological risk assessment model was constructed with landscape metrics, and land-use ecological risk indexes at multiple scales in the Pearl River Delta in 2000, 2010 and 2020 were measured by this model. Then, the semi-variogram, spatial autocorrelation and GIS spatial analysis methods were used to determine appropriate research scales and explore the spatiotemporal characteristics of land-use ecological risk at these scales. [Results](1)The 3 km quadratic scale was the best research scale, and the small watershed scale was also appropriate. At both scales, the spatial variability of land-use ecological risk from 2000 to 2010 was mainly influenced by structural factors, i.e., there was a strong spatial autocorrelation.(2)The land-use ecological risk in the study area generally had strong positive spatial agglomeration characteristics, but the degree of agglomeration trended to weaken. The local spatial agglomeration characteristics of most units were relatively stable. The distribution of high-high agglomeration and low-low agglomeration areas were obvious, and the distribution of low-high agglomeration and high-low agglomeration areas were sporadic and did not change much.(3)The degree of land-use ecological risk had gradually decreased. Low-risk level and lower-risk level were dominant risks and the distribution areas were increasing, while the areas above medium-risk level were decreasing. [Conclusion] The overall land use ecological risk in the PRD region showed positive spatial clustering characteristics, and the level of land use ecological risk gradually decreased, and the results of this study can provide decision-making reference for the optimal use of regional land space and ecological risk control.
- References:
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Last Update:
2023-10-10