Land Use Change and Landscape Ecological Risks in Typical Counties under the Background of Migration:taking Hanzhong City as an Example
This paper takes Hanzhong City as an example,based on the land use status in 2010,2015 and 2020,this paper uses land dynamics,landscape pattern index and ecological risk index to analyze spatiotemporal characteristics of the land use change and landscape ecological risk in different counties and districts under the background of migration,so as to reveal the impact of migration projects on land use and landscape pattern in different counties and districts far from the central city.The results have shown,(1)there is a large area of forest and grassland in Hanzhong,accounting for more than 85%.The area of urban land has increased significantly,and the dynamic degree of land use has declined in distance.(2)With the increase of the distance from the central city,the area of urban land gradually decreases,the patches of woodland and grassland decrease,and the index of landscape dominance increases.(3)From the perspective of time scale,the relocation of ex-situ pro-poor has a greater impact on the degree of land use change than the relocation in southern Shaanxi.(4)The overall ecological risk of the landscape is good,with local deterioration.High ecological risks are mainly concentrated in the central area of counties and their vicinity,and distributed in patches or bands.The conclusion has shown:the urban land in the suburbs has rapidly increased under the background of migration.The ecological land of forest and grass have been paid more attention to in the middle and far suburbs.The relocation of ex-situ pro-poor has a more significant impact on land use structure than the relocation of southern Shaanxi.
land uselandscape patternecological riskresettlement
万方数据
