黄土高原地区土地利用时空动态特征OA

The spatio-temporal dynamics of land use on the Loess Plateau hold significant research value,driven by multiple human activities including rapid urbanisation,ecological restoration projects,and agricultural restructuring.This study employs land use dynamics,land use intensity,and land use transition matrices to reveal the spatio-temporal characteristics of land use on the Loess Plateau from 2000 to 2020.Findings indicate①Significant shifts in land use structure occurred:grassland,arable land,and forest land constituted the primary land types,accounting for approximately 89%of the total area.During this period,construction land and forest land areas increased markedly,while arable land area continued to decline,reflecting an overall trend of intensified human activity coexisting with ecological development.②Phased differences emerged in land use dynamics:construction land expanded rapidly,exhibiting the highest dynamic intensity;the decline in arable land slowed progressively;forest land growth accelerated initially before stabilising.Spatially,this manifests as a seesaw effect between arable land and construction land,with ecological land use remaining broadly stable.③Land use conversion predominantly follows the arable land→ grassland → construction land pathway:total land conversion accounted for 12.51%of the total area.Arable land primarily converted to grassland and construction land,while grassland mainly transformed into arable land and forest land,illustrating significant competition between agricultural,ecological,and urban land uses.