Evolution and driving force analysis of landscape ecological risk in Guanzhong Plain urban agglomeration
In order to explore the evolution characteristics and driving forces of landscape ecological risks in large-scale urban agglomerations,taking Guanzhong Plain urban agglomeration as an example,landscape pattern index method was used to construct landscape ecological risk assessment model,and spatial autocorrelation,geographic detector and other relevant methods were combined to explore the temporal and spatial evolution characteristics and main driving factors of ecological risk in Guanzhong Plain urban agglomeration.The results showed that:The cultivated land was the dominant landscape type from 1990 to 2020,and the transfer changes of all landscape types were obvious,and the transfer of cultivated land was the largest,with a transfer of 7 402.11 km2 in 20 years.The high risk areas were mainly distributed in the joint areas around the city,the low and slightly low risk areas decreased,the medium and slightly high risk areas increased,and the overall landscape ecological risk level was continuously improved;The landscape ecological risk index has a strong positive correlation in spatial distribution,and has significant agglomeration characteristics.The distribution characteristics are mainly low-low and high-high aggregation.The driving force shows that the degree of human disturbance is the most important driving factor causing the dynamic change of landscape ecological risk.The research results can provide reference for the optimal allocation of land resources and ecological environment protection in this region.
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万方数据
