| 摘要: |
| 【目的】分析西北干旱地区城市绿色空间格局时空演化特征及其驱动因素，以期为该地区绿色空间优化与管理、可持续维持和健康发展提供参考。【方法】以兰州市为例，将兰州市空间划分为绿色空间和非绿色空间两类，基于该城市2000，2010，2020年土地利用数据和《兰州统计年鉴》，分析2000－2020年兰州市绿色空间格局演变特征；以兰州市绿色空间面积为因变量，选取自然因素（高程、坡度、坡向）和社会经济因素（人口密度、地区生产总值、第一产业值、第二产业值与第三产业值）为自变量，采用因子探测器对影响兰州市绿色空间变化的主要驱动因素进行分析。【结果】2000－2020年，兰州市绿色空间面积呈递减趋势，且呈现明显的阶段性特征，2000－2010年，绿色空间面积减少1.14 km2，占总面积比例下降0.11%，土地利用动态度为－0.01%；2010－2020年，绿色空间面积减少103.67 km2，占总面积比例下降9.91%，动态度为－1.14%。2000－2020年，兰州市106.99 km2绿色空间向非绿色空间转移，2.22 km2非绿色空间向绿色空间转移。2000－2020年，兰州市绿色空间以及各土地利用类型的景观格局指数发生了明显变化。随着时间的推移，兰州市绿色空间景观斑块数、斑块密度、景观形状指数均降低，聚集度指数先增加后降低，香农多样性指数和香农均匀度指数均先下降后增加。因子探测器分析结果表明，2000－2020年，自然因素和社会经济因素对兰州市绿色空间的变化有明显影响，其中社会经济因素中的人口密度、地区生产总值、第一产业值、第二产业值是主要驱动因素。【结论】2000－2020年兰州市绿色空间被非绿色空间侵占，致使绿色空间景观破碎化加剧，社会经济是影响绿色空间变化的重要因素。 |
| 关键词: 绿色空间 景观格局 时空演变 驱动力 兰州市 |
| DOI：10.13207/j.jnwafu.2026.03.015 |
| 分类号: |
| 基金项目:甘肃省教育厅创新之星项目（GS202234）；兰州市科技局项目“兰州市主要造林树种固碳能力研究”（2024-3-63） |
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| Spatial-temporal evolution characteristics of green space pattern in arid areas of Northwest China:a case study of Lanzhou City |
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LI Na1, TANG Hong1, YANG Chongjian2
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1.Colloge of Forestry,Gansu Agricultural University,Lanzhou,Gansu 730070,China;2.College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou,Gansu 730070,China
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| Abstract: |
| 【Objective】This research aimed to analyze the spatial-temporal evolution characteristics and driving factors of urban green space patterns in the arid regions of Northwest China,to provide references for the optimization and management of green spaces,as well as their sustainable maintenance and healthy development in this region.【Method】With Lanzhou City as an example,the city’s space was divided into two categories:green space and non-green space.Based on the land use data of the city in 2000,2010 and 2020 and the Lanzhou Statistical Yearbook,the evolution characteristics of the green space pattern in Lanzhou City from 2000 to 2020 were analyzed. With the green space area of Lanzhou City as the dependent variable,and natural factors (elevation,slope,aspect) and socio-economic factors (population density,regional gross domestic product,value of primary industry,value of the secondary industry and value of the tertiary industry) as independent variables,the factor detector was used to analyze the main driving factors influencing the change of green space in Lanzhou City.【Result】From 2000 to 2020,the area of green space in Lanzhou City showed a decreasing trend and presented obviously different characteristics in different phases.From 2000 to 2010,the area of green space decreased by 1.14 km2,with the proportion of green space area in the total area dropping by 0.11%,and the land use dynamic degree was －0.01%.From 2010 to 2020,the area of green space decreased by 103.67 km2,with the proportion of green space area in the total area dropping by 9.91%,and the dynamic rate was －1.14%.From 2000 to 2020,106.99 km2 of green space in Lanzhou City were converted to non-green space,while 2.22 km2 of non-green space were transformed into green space.From 2000 to 2020,the landscape pattern indices of green space and various land use types in Lanzhou City had undergone significant changes.Over time,landscape patch number,patch density and landscape shape index of green space in Lanzhou City all decreased,while the contagion index first increased and then decreased,and Shannon diversity index and Shannon evenness index both first decreased and then increased.Factor detector analysis results showed that from 2000 to 2020,both natural and socio-economic factors had a significant impact on the changes in green space in Lanzhou City.Among the socio-economic factors,population density,regional gross domestic product,value of primary industry,and value of the secondary industry were the main driving forces.【Conclusion】From 2000 to 2020,the green space in Lanzhou City was encroached upon by non-green space,leading to an intensified fragmentation of the green space landscape.Social and economic factors significantly influenced the changes in green space. |
| Key words: green spaces landscape pattern evolution space and time motivation Lanzhou City |
