摘要
基于成都市2005—2020年土地利用、城镇化率、绿化覆盖数据,利用景观格局指数、回归分析等方法探究成都市近15年景观格局演变及其影响因素。结果表明:以耕地、森林和人工建设用地为主要景观类型,三者面积变化较显著;耕地景观是最大优势景观但面积有所减小,破碎化程度不断上升;森林景观面积逐年增大,破碎化程度降低;人工建设用地面积显著增加,破碎化程度上升,景观优势度逐渐增大;城市景观总体呈破碎化趋势,优势景观类型连接度逐渐降低,团聚度下降、复杂性增加,各类型景观所占比例趋于均衡。城镇化率与景观蔓延度、多样性指数显著相关,随着城市化水平的上升,成都市各类景观团聚程度下降;政策因素对景观格局演变起到重要作用,受“公园城市”政策的影响,2018年绿化覆盖率明显增加,森林、灌木和草地面积增长;土地利用政策是影响人工建设用地和耕地面积变化的主要因素,未来土地利用规划应重视对耕地的保护。
Based on the data of land use,urbanization rate and green cover in Chengdu from 2005 to 2020,landscape pattern index and regression analysis were used to explore the evolution of landscape pattern and its influencing factors in Chengdu in the past 15 years.The results showed that arable land,forest and artificial construction land were the main landscape types,and the area of the three landscape types changed significantly.Arable land landscape was the most dominant landscape,but its area decreased and the degree of fragmentation increased.The area of forest landscape increased year by year,and the degree of fragmentation decreased.The area of artificial construction land increased significantly,the degree of fragmentation increased,and the landscape dominance gradually increased.The overall trend of urban landscape fragmentation was that the connection degree of dominant landscape types gradually decreased,the degree of agglomeration decreased and the complexity increased,and the proportion of each type of landscape tended to be balanced.Urbanization rate was significantly correlated with landscape spread and diversity index.With the increase of urbanization level,the agglomeration degree of various landscapes in Chengdu decreased.Policy factors played an important role in the evolution of landscape patterns.Influenced by the“Park City”policy,the green coverage rate and the area of forest,shrub and grassland increased significantly in 2018.Land use policy was the main factor affecting the change of artificial construction and cultivated land area.The future land use planning should pay attention to the protection of cultivated land.
作者
徐婧琳
张军梅
陈凡
张洪森
XU Jing-lin;ZHANG Jun-mei;CHEN Fan(Faculty of Geography,Yunnan Normal University,Kunming,Yunnan 650500)
出处
《安徽农业科学》
CAS
2023年第19期80-85,89,共7页
Journal of Anhui Agricultural Sciences
基金
云南省省级大学生创新创业计划项目(S202110681042)。
关键词
景观格局
演变特征
城市化
影响因素
景观格局指数
成都市
Landscape pattern
Evolutionary characteristics
Urbanization
Influencing factors
Landscape pattern index
Chengdu City
